Author: AnonyMPC

Title: Magic Marker, Book Two: Indelible

Summary: Life as her brother's fuck toy is a mixed blessing for Susan... it sure is a lot of fun, but he's just so irresponsible, always pushing boundaries, both hers, and those of the magic marker that makes whatever is written with it come true. The marks on her may only last a week, but a week is a long time, and some of the changes her brother makes... they might just be indelible.

Keywords: mg, Mg, mc, fg, bond, anal, inc, Mdom, humil, magic, oral, spank, toys

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Previously, in Magic Marker, Book One: Felt: Two kids found a magic marker, and discovered it really was magic... anything written on a person or object becomes true, until it wears off. Unfortunately, twelve-year-old Susan wrote "Jerk" on her brother to try to prove its powers, and he took control from there, writing a series of marks on her... like "super-horny", "loves anal stuff", "addicted to cum", "cock sucker" and "fuck toy." She thought the changes would be temporary, that when the mark "jerk" wore off he'd be back to normal... until she found out that he rewrote the word on himself, because he liked being a jerk.

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### Magic Marker, Book Two: Indelible by AnonyMPC (mg, Mg, mc, fg, bond, anal, inc, Mdom, humil, magic, oral, spank, toys)

***

Chapter One:

Susan wondered if her life was ever going to change back to the way it was, or if this was the way it was going to be from now on. Obviously some things wouldn't... some changes couldn't be changed back, lines couldn't be uncrossed. Losing virginity, for example. And some lessons stayed with you forever. But sometimes you could pretend the changes didn't happen, decide not to make mistakes again, and go back to living the way you did before, couldn't you? Or was this the new normal?

The question crossed her mind as she lay spread eagle, each of her limbs bound to one post of a twin-sized bed (her arms cuffed to the headboard, her ankles tied with ropes to the foot). Semen was drying on her face leaving a sticky, flaky mess everywhere her tongue couldn't reach, and there was a slim rod in her ass, a feeling that she loved except that she knew it could also be made to vibrate, but only if somebody turned it on. That was something she was in no position to do, no matter how much she wanted it. And she wanted it... in fact, she craved it. Even at twelve years old, Susan was super horny, her hairless pussy practically throbbing with need, and she was unable to do much of anything about that need, aside from clenching her ass around the inactive vibrator for the faintest hint of stimulation. It wasn't enough, not by a long shot.

It was her brother's fault she was stuck like this, that this might be her life from now on. Keith was a jerk.

And that was Susan's fault, that he was a jerk. She couldn't escape that. She was the one who wrote the word on him, with a magic marker - a marker that made almost anything you wrote on somebody a true description. In writing those word 'Jerk' she turned him into one.

Since that moment, the marker was in Keith's hands, and he'd used it to turn their family life upside down, and Susan's life in particular. Now, in addition to being super horny, she was addicted to cum, she loved anal stuff, and she was both a cocksucker and a fuck toy. All of that was because of the marker, and a heavy burden to bear for a preteen girl who was a virgin who'd never been kissed the day before. At least he also made her infertile, so she wouldn't have to worry about getting pregnant, although she'd begun to think about that while lying there, waiting for her brother to return from downstairs and hopefully uncuff her... maybe it was because she was super horny, but the idea of giving birth to her brother's baby made her heart flutter and thighs clench even more. Even though that would be another one of those permanent changes that she could never come back from, a part of her nonetheless wanted it. It wasn't even so much the birth itself that excited her most. It was the thought of everybody seeing her pregnant, knowing she'd had sex, maybe everybody in school seeing her with a baby bump. Sometimes she even fantasized that they knew it was her brother behind it, but of course she didn't really want that, unless it was some fantasy world where he couldn't get in trouble.

That could be the case at home, she realized with a squeeze of her ass, at least now that her brother had used the marker on their parents... if he kept marking them every time what he'd written had started to fade, at least. Because right now both Mom and Dad had magic words on their bodies that forced them to have complete faith in Keith. If he got her pregnant, they would believe him if he told them he wasn't the father. They'd probably believe him if he said he was the father, but she seduced him and so it was her fault, or there was some other reason it was okay. Maybe he could even convince them they should be married, or act like it... who knows how the far the magic would take it.

Susan grunted, and tried to pull her hand to the toy inside her once more, completely forgetting the cuff that yanked back at her as it clattered against the wooden headboard. When was Keith coming back? What if he forgot about her?

No, that was a ridiculous fear... it was his room, after all, he'd have to be back eventually. And she didn't hear the front door slamming shut like it usually did when he left the house. He might be downstairs watching TV, after enjoying whatever it was he was making himself to eat. She had detected the unmistakable delicious, greasy smell of bacon wafting up a few minutes ago, and some other scents too. Maybe he was making something extremely elaborate and complicated, and that's what was taking so long. Maybe he'd just gotten bored of her and decided to experiment with how far the magic words "Good Cook", written on his arm, in magic marker, carried him beyond his normal skills. Before writing that, he'd never cooked bacon himself, or much of anything. He wouldn't even fry an egg. Now he was making, or had already made, what smelled like a delicious lunch.

Hopefully, he'd make enough for her, too, because Susan was starting to get super hungry as well as super horny. And super bored. Judging by what she read in those Shades of Grey books her mother liked, bondage was supposed to be exciting. And maybe it was while Keith was right there with her, doing anything he wanted without her even being able to resist a little... unable to close her legs and force him to prove how easily he could pry them apart, or even to control things enough to assume a more comfortable position, just open to be taken and used. Even when he was cruelly denying her, not cumming inside of her so she could have her fuck toy orgasm, and jacking off on her face while the restraints prevented her from fulfilling her cocksucker nature, there was some level of excitement to it... she had, even before the marker, wanted to watch what it looked like when he squirted, just for curiosity's sake. But then he left, and all she could do was lie there, waiting. And that was starting to get boring.

Normally, if she was stuck somewhere, like on a long car ride or waiting for a doctor's appointment, what she would do is work on one of the stories in her head, work out the details of a plot twist or try out various ways of describing a person, place, or action. Here, though the ever-present horniness didn't even grant her that escape... every time she tried to divert her thoughts, they soon fled back to how she wanted... no, needed to cum really bad. Her mind may have been like a ping-pong ball, back and forth between her needs, and what Keith was doing, and whether she might be able to squeeze her hand out of the handcuffs and escape, and whether she should... but it was a boring ping-pong ball all the same. For a time she occupied herself by seeing if she could on turn the vibrator in her ass, by rubbing it along the sheets underneath her in a way that might twist the knob. She tried that again, but without luck, and puffed out a frustrated breath of air that tossed her bangs out of the way of one of her eyes.

Finally, after what seemed like an impossibly long time (her panties were covering the face of the clock by Keith's bed so she couldn't say for sure, but it felt like an hour or more since he first left), she heard a series of plodding steps ascending the stairs, and waited, flexing her butt and arching her back slightly to raise her pussy and give him as tempting a sight as she could... maybe he'd want to play with her.

Her brother pushed open the door with a sock-covered foot and entered, his hands full with two plates. On one was a half-finished sandwich, toasted and full of gooey cheese. A grilled cheese sandwich, but not just a conventional one, there was bacon and something else... closer, now, she could smell mustard somewhere in there. The other plate was covered in a pot lid. Susan licked her lips, hoping it was for her, another one of those delicious smelling sandwiches, or maybe something else. Probably something else, or why hide it?

As long as it wasn't something disgusting... he might be enough of a jerk to like humiliating her by making her eat something icky. If he did that, she hoped it would be a cum sandwich... she could pretend not to like that but enjoy eating it anyway due to her addiction, which, after a certain amount of time, made swallowing cum, in any form, as refreshing as a thirsty man in the desert finally finding water. If Keith provided something really disgusting, her only hope might be to pretend she really wanted it... reverse psychology was a good tool on a jerk, or at least she thought it might be... though too often she only thought of it too late, like the moment after he smiled and walked out of the room immediately after she suggested that he couldn't leave her tied up. It seemed like forever that he was gone.

But now he was back. Keith put the covered plate on his desk, the other on a chair, without saying anything about it. Susan couldn't take the mystery anymore. "What'd did you make?" she asked.

"This?" he asked, and picked up one half of the sandwich, the half with a bite already taken out of it. "Grilled cheese with bacon and apple."

"Apple?" she asked. She liked apples, but... in a cheesy sandwich? Still, it smelled pretty good.

"Yeah, I know, sounds weird, but it tastes really good." He took another bite... it crunched, although when he pulled his mouth away the cheese trailed back to the sandwich until it finally fell away. Keith chewed a few times, then continued, mouth full, "Mom really needs to go shopping though, I could do a lot more if I had some decent ingredients." He swallowed. "Shit, I should audition for Masterchef or something. Just have to write it on me and I'm a shoe-in."

Susan wasn't sure whether she should point out that if he went on a reality show, he'd have to go alone, and stay alone for several weeks... which meant any of the marks on her or their parents would disappear before he came back. That would be one way for her life to get back to normal... although, she wasn't sure whether she even wanted that anymore. Some changes, sure, but she'd be happy to keep a few of the marks on her. The only ones she absolutely wanted gone were on his body, not hers... the ones that said "Jerk." There were two of those, one she wrote, and one he wrote himself in a more convenient place and was free to renew for as long as he had the marker. If he did audition for Masterchef, she figured they'd probably choose him... "Yeah," she finished the thought out loud. "They always chose a few jerks for the show, to create drama."

He grinned, and leaned over her, tugging at one of the handcuffs with one finger. "So how are you liking bondage so far?"

Was now a time for reverse psychology, or not? She wasn't sure, and so chose the middle path. "It's okay," she said. "But boring. And I'm hungry. What's under the tray? Is that one for me?"
"It is," he said, his face animating in a smile. "But it's not a delicious bacon and apple grilled cheese sandwich."

Okay, this was definitely a time for reverse psychology. "It's not a cum sandwich or anything like that, is it?" She make an effort to wrinkle her nose in disgust, even though right now she craved cum so much it hurt, she'd even eat it on wax green beans, her least favorite vegetable. Mostly she just didn't like Keith knowing how much she liked it now, he'd make fun of her for it and, probably, withhold it even more, just to be a jerk.

"No," he said. "Although that is a good idea." Susan deliberately grimaced, so she wouldn't see her delight in the idea. "Anyway, I was just thinking, you're right..."

"I am?"

"Yeah... about bondage. It has its appeal, but mostly, it's boring. What's the point of having a fuck toy if I have to do all the work? It's more fun if you can move around some, don't you think?"

Susan didn't think you needed to use reverse psychology when someone was asking you to agree with them, so she nodded. "Yeah."

Keith reached into his pocket and retrieved the keys, unlocking each of the handcuffs, and then turned back towards where he'd left the plate. Susan's arms, which had been experiencing a dull ache from being above her head for so long, began to suffer brief stiff pains as she lowered them to her chest... never enough that she felt close to crying out, but she winced before twisting her arms in every direction to both make sure the pain wasn't too bad, and also to see if she could take it if it did. But, as there were no lingering problems, she immediately bent forward to start untying her feet. These were easy... they were only tied tightly enough that it was difficult to escape without hands, and even then, if she really kicked, she might have been able to pull it loose. She just never tried because the benefits of her legs being free to move didn't outweigh the risk of accidentally making the knot tighter, or angering Keith, or the vibrator falling completely out of her butt while she tried to work herself free.

Speaking of the vibrator, after freeing her legs she immediately pushed it back inside that little bit... she hadn't even thought of it, it just seemed like it needed to be deeper in her ass than it was, and fixed the mistake. That settled, she looked over to her brother, who had the mysterious covered plate in his hand. He was obviously waiting for her to ask again, so she didn't, but that didn't stop her from eying it warily. "So if we're done with bondage, do you want to have sex with me again?"

"What makes you think I'm through with bondage?"

She frowned. "But, you just said..."

"I said it's more fun if you can move around."

"So... you want me to tie you up?" Her heart beat a little faster. If he was tied up, he couldn't stop her from taking and using the marker... but no, of course he couldn't actually want to be tied up. What made more sense was that he wanted to tie up just her arms or something, maybe so she'd have to be standing up.

"Of course not. I just think we should try a different way." He lifted the pot-lid, revealing beneath it a pile of smooth black stuff that at first gave off the impression of a coiled snake... but of course, it wasn't, it was too thin for that, except for a few larger lumps, and Susan quickly realized that it was some kind of restraints, and on the top of it was what looked like....

"That's a dog collar," she said.

***
Chapter Two

It was made of dark leather, with little metal studs, although there was definitely more to it than that, the collar merely sat atop a pile of other stuff that she hadn't identified. "Yes, it certainly looks like one, doesn't it?"

"Where did you even get that?" They didn't have a dog. Could he have taken it from the neighbors?

He picked up the collar, and she could see that it was attached to a leash, which made up much of the pile... but not all of it. Beneath that, there were other things she still wasn't sure about, but they looked like they might be boots or gloves or something. Those didn't come from the neighbor's dog. "Apparently, Mom is more of a freak than I ever imagined," Keith said. "Or maybe it's Dad. But I think it's probably Mom. She reads those stupid books."

The Fifty Shades books, he must mean. Susan had read some of it, but she didn't remember anything like this in them. Of course she flipped back and forth a lot while trying to find out the appeal, rather than reading straight through. There was just a lot of Christian being a controlling jerk, which she didn't like (although there were times when it seemed like him looking out for her because she didn't care about herself enough, and that tickled something inside of her), and some tying up and hitting. A leash? That seemed especially weird for people having sex to do to each other. Like who'd want to have sex with a dog?

Keith, apparently... or at least, like somebody he could treat like a dog. He leaned forward and attached the collar to her neck. She remained still for this, knowing that fighting it was only going to lead to more trouble later. And what did it matter, if he used the leash while having sex with her doggy-style, he could pull her head back without grabbing her hair. She always liked how that felt, him pulling her back, and at the same time pulling her more onto him, but with her short hair sometimes he had to grab too close and pulled too hard and it hurt.

When she put a finger between her neck and the collar, Keith asked, "Too tight?" She shook her head, taking some comfort in the fact that he cared. It might be uncomfortable if she had to wear it for a really long time, but probably it wouldn't be long before Keith got bored, and even if he didn't, Mom and Dad would be back that afternoon. Both their eyes lingered on the other stuff on the platter. Keith held one up and it looked like a mitten made of leather. She could now tell beneath them were some boots that had weird long straps and buckles, but whatever they were for, Keith looked at them and put them aside on the bed, saying, "I think we'll do without these, for now. As long as you're good." Before she could think about what that meant, he ruffled her hair, then stroked her side with surprising tenderness that gave her goosebumps. "Come on," he said, then stood up and pulled on the leash. Susan climbed off the bed and stood, enjoying the feeling after being on her back for so long. Keith took a step out of the room, and Susan followed.

They only got a couple steps for her brother looked back. "What are you doing?"

"What?"

"Dogs don't walk like that. Get on your hands and knees."

She did this without complaint. She'd done that before, fully clothed, once in a while, run around on her hands and knees for fun. This time, she even had a tail to wag.

Or had, anyway. When she wagged it to demonstrate, the vibrator clattered to the floor.

"Oops," she said, and reached back to grab it. It wasn't so bad, at least now she could turn it on.

"No," Keith said, his voice firm and forceful. She looked up at him, hopeful. Did he want to fuck her already? Instead, though, he said, "You can't pick things up with your hands. You're a dog, remember?"

Susan rolled her eyes with her head lowered so he couldn't see. This was just getting silly. What next, was he going to make her eat out of a bowl on the floor? "Come on, Keith, you can't make me..." She wasn't trying to stand up to him, though, she said it more to try and convince him how silly it was.

"Of course I can," he interrupted. "I could get you to put on the rest of the outfit so you can't use your hands or walk on your feet, but I think it's more fun this way. Remember... I can make you do anything I want. I can write 'acts like a dog' on you and you won't have any choice. You'd follow me out to the yard and lift your leg to pee on the fencepost if I wanted it. Or I could breed you to the dog next door and make you love it. And maybe I will do that if you won't be a good doggy inside the house." Susan gulped. "But, see, the fun part of being a master is watching you do things not because you have to, but just because I ask you to. And if I'm not having fun... well, let's just say that the more bored I get, the more time I'll have to think about other things the marker could force you to do."

By now she knew when she was defeated. "Okay, fine," she said. She let go of the vibrator, and hoped he'd put it back in.

"No talking, either," he said. "Dogs don't talk. And they certainly don't talk back. If you need my attention, you can bark."

Susan sighed automatically, belatedly wondering if dogs did that, if that would get her punished. Keith didn't call her on it, though. Instead, he tugged on her collar again. But... she almost spoke the word aloud, then remembered, and let out a little bark, like a dog asking a question, and nudged her head to the vibrator.

Keith bent down, took it, then put it on his dresser. "No, I don't think you've earned this yet."

Surprisingly, Susan found she didn't mind it being out after all. She loved anal stuff, but that being inside of her for so long, and on for a large part of their bondage play, she'd started to feel used to it, almost numb to it. In fact, with it out, her butt actually was tingling even more than it had before, as it got used to trying to be tight again. She still craved the feeling of something inside of her, but the feeling of it first going in, stretching her was one of the best parts. And it was like almost anything... if you don't take a break, you take it for granted. Like how eating feels good, but it's so much better if you're actually hungry.

That comparison made her tummy rumble to remind her that she was still actually hungry, but if she couldn't talk, it was going to be hard to satisfy that urge, unless Keith let her off the leash... or unless he let her suck his cock. But although she craved that too, it wasn't very filling, and it didn't seem to be part of Keith's immediate plans anyway, since he had his pants on.

Instead, he led her downstairs on the leash, while she shuffled forward on her hands and knees, which she might have done on her own sometimes, but it got old fast, particularly when you went down stairs. Going upstairs wasn't too bad, but down was surprisingly slow and awkward, particularly when somebody's walking in front of you and you have to keep your speed low.

On the ground floor, he walked her around in a circle, just to seemingly tease her and show off his power. After the second repeat, Susan decided to make a barking noise and pull at the leash when they neared the kitchen entrance.

He deliberately missed the point. "What's that, girl?" he asked. She barked again and jerked her head towards the kitchen. "You want to go for a walk outside?" He started towards the front door, which they were nowhere near, and she waited until he tugged hard on the leash to finally follow, a big frown on her face. "Okay," he said. "If you want me to walk you out outside, I guess I can."

A blush formed on Susan's face, despite her knowing how unlikely it was that her brother would follow through with the threat. She could see him maybe doing that in the back yard... it was a risk, but there were fences and most of the time nobody was looking in anybody's yard. But out front? Somebody would see. And it didn't matter that Keith had a magic marker, he had to know that if he took her out naked in the front yard on a leash, he'd be arrested. Still, just the thought... everybody seeing her... thinking she was some kind of freak for going along with her brother. Maybe he wouldn't even be risking himself... what if he just took the leash off, opened the door, and told her to run around outside without him, so it looked like her idea? He'd never do that, would he?

Maybe. And maybe her flushed face might give him the idea that she wanted it, like it sometimes seemed to. So Susan shook her head defiantly and barked again. "I don't know what you want," he said, like he was disappointed, but the smirk on his face proved that was a lie.

Fine, she'd play that game. She sat up on her knees, and then put her hands up by her mouth, palms down, like she really was a dog and doing the "begging" trick. Dogs did that when they wanted food, right?

"Oh, you want some food, do you?" Susan nodded, and barked. "Oh, okay, fine. Let's get you some food."

Finally, he walked her to the kitchen, and started looking through the cupboards. Since they didn't have a pet, Susan at least didn't have to worry that she was going to have to eat dog food or something gross like that. He'd have to give her real food.

Keith must have been thinking along similar lines, but more inventively, because he pulled out a bowl and a box of cereal, and poured the cereal in the bowl. It was Reese's Puffs, which, in a bowl without any milk, did actually look a lot like dog kibble. Even more when he put it on the floor like he expected her to eat it from there. Which, Susan supposed, he did.

Eating the dry cereal didn't bother her... sometimes she liked eating it without milk more. But eating without her hands was going to be difficult and humiliating. Then again, she was so hungry. All she'd had for breakfast was some cum, an under-the-table blowjob her brother demanded. And although that satisfied one kind of hunger, it was only took up a tiny amount of actual space in her stomach.

So she glared up at him, and then planted her mouth in the bowl, slurping as much as she could into her mouth and then chewing them into tiny bits and swallowing. On her second mouthful, just as she was starting to need a drink, her brother read her mind again, and put his usual degrading spin on it. He half-filled a bowl with water and put it beside the food bowl. She knew she'd get punished for using her hands, so she lapped up what she could with her tongue, while occasionally looking up at her brother who had a smirk on his lips.

Going back and forth between the cereal and the water, it took what felt like ten minutes to finish off the bowl, and her stomach felt better, but she still wasn't full. Yet she couldn't ask him for more, not directly. Even if she made a sound, she'd probably just get more cereal, and she was getting sick of that. So when he asked "All done?" she gave a little shrug, and he tugged her leash to get her to follow him back to the living room.

There, she finally got something she wanted, a reward for obedience. Her brother patted the couch, like he wanted her up on it, and when she complied, he used his free hand to pull apart one lip of her pussy while the one that held the leash fumbled for his crotch. Finally. She let out the happiest bark she could make. "Yeah, you're going to be a good doggy, aren't you?" Another happy bark greeted that, and seconds later, felt the warm head of his cock pressing into her, prying her apart, and her fuck toy instincts took over, her hole relaxing just enough to allow him easy entry while still being tight. Soon he was thrusting up into her, filling her, while she let out a little moan that sounded close to a growl. A few seconds later, she let out a bark. Maybe it was because he was treating her like a dog, her fuck toy nature forced her to act like one... or maybe it was just the only thing that seemed natural, considering he asked her to pretend. It was hard to tell sometimes... that was the scariest part of the marker's writing. How much would go back to normal if the words faded, and how much was not a permanent part of her soul. Maybe now that she'd experienced sex and how good it could be, she'd always be super horny. For all she knew she was a natural fuck toy and the marker just awakened that instinct for the first time.

At least she enjoyed getting fucked, and continued letting out animal noises, usually right at the end of a firm thrust, or when he first did tug back on the leash, forcing her neck back into an uncomfortable position, and yet liking the feeling even as it made her yelp.

Keith seemed like an animal too, at these times, the way he took her, pounded against her, like instinct had completely taken him over, and the only thing that set them apart was that he was the alpha, the one who was unquestionably in charge, the one whose pleasure came first. It was a relief losing herself in that secondary role, especially knowing that as a fuck toy, her pleasure would come when his did. Why not let him take charge, use her body to get what he wants as quickly as possible? After all, she'd get it at the same time, and if she expended any thought beyond reacting to his movements, she might just get in the way and delay things. When she gave her will over to his, it was like they were one.

Before long, they were one in orgasm too, as she felt that squirt inside her that triggered an explosion of pleasure, her eyes rolling back in her head and not even caring that she felt like she couldn't breathe because he'd reflexively pulled back on the leash so hard it was choking her airway. He let go just as she was starting to feel like she might pass out, but in some ways that was what it was always like, towards the end, as the pleasure receded. He let the leash drop and they both breathed out firmly as he pressed his crotch into her to make sure every last drop landed inside. "Good doggy," he said finally, as he let himself slide out of her, pulling a river of slime with him. He let go of the leash and backed away, pulling his cock back into his underwear. "You stay and clean up, I need to go to the bathroom."

Susan started to do what was instinctual by then, satisfying her cum addiction with what was already inside of her. But when she reached towards the goo dripping down her legs, her brother's voice stopped her cold. "No," he said. She looked up to see a grin on him. "No hands, remember?"

"Bu..." she started to ask, but he shot her one more warning glance and she corrected herself. "Buh-ark," she said. How was she supposed to clean herself up without scooping up the cum and licking it off her fingers?

Like dogs clean themselves, she decided instantly, as Keith continued on to the bathroom. It was easier said than done. She was flexible, but it was hard to bend in half and get close enough to lick. To smell, that was easy, that pungent (yet somehow now pleasantly intoxicating) aroma was tantalizingly in reach, but her tongue wouldn't reach. It wasn't just a matter of bending over... she could touch her toes without problem, but that would put her head nearer to her knees, still too far from her pussy. By trying to curve her spine and neck in an awkward position, she could get close, not quite make contact. It always came down to two parts of her body needing to pull in different directions.

She let out an exasperated sigh, blowing up a lock of her hair in the first puff, and as she watched it drift down she had another idea. Instead of bending to reach it, she lay on her back and pulled her legs in the air, dangling over her, like she was in the middle of a somersault and stopped.

She still couldn't reach it... but now gravity was working in her favor. Only... not fast enough. Though she opened her mouth and extended her tongue, it was mostly sliding along her body, rather than dripping down. She did manage to squeeze her pussy in such a way that a white drop from inside dangled temptingly, it was like waiting for stuck ketchup in a bottle.

"Well, you're trying," her brother said, having returned from the bathroom. "I'll give you that." She hadn't been paying attention to the sounds, so it surprised her, and turning her face enough to see him caused a long strand of liquid to land on her cheek. Luckily, that was within range of her tongue. "Maybe I should write 'flexible' on you so you can do it exactly like dogs do."

She couldn't answer him, not without breaking his rules, so she gave him a shrug and a smile. That really wasn't something dogs did either (they always looked like they were smiling), but he never complained about that. Still, being more flexible was one of the better things he could write on her. It would be like a super power. She didn't want to either overly encourage him or discourage him.

"Maybe later," he said. "Could be fun to try out a few new positions, but right now it's still too fun watching you struggle."

Susan rolled her eyes, but went back to trying to lick herself, until a growing pressure, one she'd been feeling for a while but suddenly kicked up intensity, made her turn over and crawl on her hands and knees. She needed to go pee.

When she made it to the bathroom, she frowned and realized that Keith had closed the door on the way out. She looked back at him, but he was watching her with a curious interest, and he'd be pissed if she used her hands to open the door. So instead, she summoned up a whine from the back of her throat, like a dog who wanted something urgently. It wasn't quite that bad yet, but probably it would be in a few minutes.

Keith stood up and slowly moved towards her, a smirk on his face. "Shouldn't you be scratching at the door to the backyard?" he asked. "That's what dogs do."

She stared at him with a pleading look. The backyard? That would be so embarrassing, and maybe messy too if she had to do it like a dog, which she'd never tried before. But especially embarrassing, and worse, dangerous if anybody actually did see. How could he ask her to do that?

It turned out, he couldn't... or, at least, he wouldn't, yet. "But okay, you've been a good doggy so far, I guess I'll let you be a human in the bathroom." He opened the door and stepped out of her way, and Susan took him literally. When she crossed into the bathroom, she stood up and closed the door, then sat down on the toilet. She did have to pee, but why waste the chance to use her fingers and get more of that delicious cum her addiction told her that she still needed.

After she finished relieving herself, she washed, opened the door, and got on her hands and knees again to walk out. Keith smiled at her over the arm of the couch, then patted his side, out of her view, but loud enough that she could hear it. "Come on, girl."

She rushed, as best as she could not actually having four legs, and hopped up on the couch beside him. He continued to pat his side, and tentatively, she leaned against him, then lay against him, as he put his arm around her and stroked her gently. "Good girl," he said. "Let's watch some TV."

Except for the sex, being a dog was largely a pain, but this... she liked this, snuggled up against her big brother, watching TV. She felt... loved. Maybe it was the way his fingers played along her skin, like even when he was distracted he wasn't willing to let her go... or maybe it was that he turned on Nickelodeon, and they watched shows she liked but he, supposedly, didn't. Why do that, except because, even as a jerk, he still wanted to make her happy, like she'd made him happy? And that didn't just feel good, it felt warm and safe. For that feeling, and of course, for the sex, it would be worth being a dog. She could keep her mouth shut for that.

When she returned to her room, she decided she would write about this moment in the story she was writing about her experience, to never forget that he loved her. Or she might, if she got the chance. If Keith made her give herself over to being a pet as well a fuck toy, that might become impossible. Dogs don't write, after all.

The thought scared her, but so did the knowledge that, this, too, she could probably accept, if it meant the rest came along with it. It was like she was being simplified, reduced, from a person with dreams, hobbies, and conflicting opinions on things, into something that only existed for pleasure, hers, yes, but most importantly, somebody else's. There was something alluring in that, too. She had already enjoyed her transformation into fuck toy... maybe all those extra things, they were just clutter, getting in the way of her true role in life. Maybe she was wrong to want them.

It didn't stop her from actually doing so, though... she wanted her freedom and to be able to speak, and not give up the orgasms Keith had been giving her either... but she could do without freedom for a while, anyway. She could lay with her brother and be his faithful dog.

After about an hour of TV, Susan felt Keith shift beneath her, followed by him standing up so abruptly that she fell to the couch. "Okay, that's enough television." He tugged on her collar, and led her to the kitchen, still walking on her hands and knees. "Still hungry?" She nodded, a little warily. "Well, you've been a good dog, so I think I can give you a treat." He dropped the leash. "Stay." She did, and sat on her hind legs, watching as he prepared what looked like another sandwich. She waited eagerly. If she had a tail, she knew she'd be wagging it right now.

It didn't take long... he didn't make her exactly what he made for herself, but a far simpler version that at least wasn't something you'd feed a dog... a grilled cheese sandwich. But she liked those well enough, even if only Dad had ever cooked them for her before. When he was done, he put it in a shallow bowl and said, "Sorry, I finished all the bacon myself." Susan brightened that he actually apologized... it was uncharacteristically nice, but maybe it was jerky enough to hog all the bacon in the first place that apologizing over it still satisfied the marker. Or maybe he remained a jerk by how he gave it to her. "You want?" he asked, keeping it just out of her reach.

She opened her mouth to speak, but caught herself, and barked. "What's that?" She barked again. Then she realized, and so she sat on her hind legs and pulled her arms up and her fists balled up under her chin, making whimpering sounds, begging like a dog. "Okay, here you go," and put the sandwich on the ground.

That was when she realized how much of a jerk he still was. How was she supposed to eat a sandwich without using her hands, particularly a gooey one that stuck together. She looked down at it, then up at Keith, but her eye caught on the fridge behind him. There was a magnet on it that said "Don't Just Complain About Problems, Find Solutions! Think outside the box." Mom had brought it home from work one day a couple months ago as some kind of motivational saying... it seemed like good advice, especially now. She couldn't trust her brother to help, so she had to try and find a solution. After a moment's thought she scooted over to the bowl on her belly and bit into one corner, trying to take a small piece and lift it over the edge. Once it hung over, she figured she could take small bites.

Her plan didn't work... her first few tries when she tugged on the sandwich with her teeth it would just tear off edges of bread, and when she finally got a good grip and pulled, she pulled too hard... the whole sandwich moved and the bowl clattered as it overbalanced one end.

Her brother's hands ruffled her hair. "Okay, you know what, I don't want you making a mess on the floor, and I've got other things to do, so until I say otherwise, you can walk and use your hands again." Having Keith solve her problem wasn't exactly thinking outside the box, but considering he was the one who caused the problem in the first place, she wasn't going to beat herself up over it. Before she could grab the sandwich, Keith bent down at his knees, grabbed the leash, and followed it with his hands to her collar, gave it a tug. "But you keep this on, you understand? So you understand who you belong to." Susan nodded, savoring the idea, that she belonged to him. Her brother wouldn't make such a claim on something he didn't want, right? "And no clothes, and no talking. Otherwise, you can do what you want."

He dropped the leash, stood, and left the room, just like that.

Susan remained sitting on the floor for a few seconds, then picked up the sandwich with her hands. She waited at first, looking back to see if her brother would come and change his mind, but when she heard him going up the stairs, she leaned in and took a bite. It was probably one of the best examples of grilled cheese she'd had, the light crunch of the bread when her mouth closed over it somehow still managing to ooze butter, and then reaching the savory, gooey cheese inside. The only thing that might have made it better was bacon, and maybe apples, though she still wasn't sure about that. And maybe some ketchup. She liked ketchup for her grilled cheese.

But then, she could just get it, couldn't she? She realized that despite the fact that she'd been given the freedom to do what she wanted, she still felt constrained. She was, after all, still sitting on the cold floor, like a dog, butt naked with a collar on her. The last two, she might not have been able to do anything about, not without violating her brother's orders and risking his wrath and, perhaps, another unwelcome enforced change from the magic marker, but she could still sit like a person and eat off a plate rather than a bowl, with ketchup and keep a little bit of dignity.

Dignity, it had seemed, was no longer something she cared much about. When you've lost so much of it, it just seems crazy to spend so much energy holding on to the rest. Maybe it'd even be better to go all the way and give it up rather than have it taken away... if she got up and sat at the table and act like a person, maybe that would just make it harder the next time her brother decided to take that right away from her.

She compromised and sat cross-legged on the floor, which was more comfortable and certainly not something she'd ever seen a dog do, and with the bowl in her lap. Now if she could just get something in her ass...

***
Chapter Three:

Keith didn't come back for Susan, so she had to go fetch him. She'd gradually allowed herself more human pursuits after her sandwich, from washing her hands after her meal like a person, to sitting on the couch and watching her favorite shows while idling working fingers into her ass, to finally walking upstairs and enjoying some time on the computer in her room, writing up the newest part of her life story, listening to music, watching funny videos, and other things she could do with her hands free and her rectum flexing regularly around a pen. That included touching base with her friends through messaging, although she kept it brief and vague. Her friend Dana saw her online and wanted to talk on a video chat but Susan was afraid to violate her brother's spoken rules... no talking, and no clothes. Who knew how he might punish her? She didn't need the leash she was wearing, she realized, the threat of the marker--or even just the threat of being unable to satisfy the words on her skin--kept her on a short leash. With her friends, she stuck to text (that didn't count as talking, she decided) and turned Dana down quickly then hid her online status so no one else could contact her. Talking to them just reminded her that she couldn't afford to make plans with friends, her needs would yank her back to her brother at any moment.

Was it her super-horniness or her cum addiction that got to her first? She couldn't say, it all crept up on her subtly but when she found herself surfing for porn just to pick up some techniques, she realized that she had better submit herself to her brother then or she might never get any peace... their parents would be home before too long and it might be her last chance.

His door was closed. Susan hesitated outside of it. He'd said that she could use her hands, so knocking was an option... but he seemed to like things better if she played along. Maybe she should try to get his attention like a dog, scratch at the door, whine wordlessly to be let in. It could backfire though, make him keep up the dog act, which was already wearing a bit thin for her and, she hoped, him too. What she wanted to do was just open the door, bend over in front of him and spread the lips of her pussy and beg him to fuck her, or maybe, if he was busy, to just nurse on his cock until he filled her mouth with his delicious semen. But that was too bold, and besides, entering his room without knocking always pissed him off.

Finally, she couldn't wait any longer and decided to take him at his word... he said she didn't have to act like a dog except for the collar, so she knocked. He could always change his mind after. Keith didn't invite her to come in, so she waited, and gave some thought to trying to pose herself in an alluring way. Without talking, how could she try to subliminally suggest to her brother that he should fuck her right away, other than being naked and wearing a collar like she already was, and yet not as desperate as just bending over in front of him like she expected him to serve her?

She settled for backing against the wall and sliding down to her butt, bending her legs and sliding her fingers through her warm, wet pussy. Maybe it'd make him think he'd left her for so long that she tried to take care of it herself.

It certainly wasn't the first time she'd touched herself down there. She'd had to, in order to clean herself, or to gather cum to eat later, and sometimes while she was doing something sexual with her brother it seemed like the natural thing to do, to enhance the sensations. However, this was the first time she'd rubbed her own pussy in such a determined way, when she was all alone, just to please herself. Her ass, she'd played with that a lot on her own, shoving fingers or other solid objects in to satisfy the magic words her brother had written on her buttcheek, but it wasn't quite the same thing. That was just fun, the words said she loved anal stuff, and it was only natural to do stuff you loved. This was actually masturbating like they did on the porn videos she'd just started to watch now that her life had taken such a turn for the sexual.

The concept of masturbation wasn't new to her, but now she felt like she truly understood it for the first time. It wasn't just a relief to urges she didn't understand before she had them, it didn't just enhance pleasure. Even as it relieved the desire to be touched it somehow also made her need greater and harder to resist. The more she did, the more she wanted... what started as a slight rubbing, soon that wasn't enough and she stuck two fingers right in the hole, as far as she could, wiggling them while the palm of her hand rubbed the area outside. It certainly didn't feel as good as her brother fucking her, but it was something, and heightening her super-horniness, getting close to the point of orgasm on her own. Maybe if she triggered it herself, she wouldn't need Keith anymore, except for the occasional dose of cum to feed her addiction.

The thought was a pipe dream, she knew she couldn't seriously deny her brother, she was already a fuck toy and even if she could somehow turn herself into an uncooperative fuck toy... if he wanted her he could force it on her, or force her to accept a new magic marker curse. Still, as she used her fingers like a cock and fucked herself, a part of her played with the idea, unsure whether this independence was something she should crave or be afraid of.

As she brought herself closer to the edge, she scooted forward, and her outstretched leg began to kick at her brother's door, partly just to move--she wanted to move, to toss her body around violently if nobody else would do it--but partly to get his attention again, too, to warn him. Better come quick, she thought. Or I won't need your cock anymore. I'll have an excuse to not come here. And I don't want that excuse. It was a revelation, even if she didn't know yet whether she'd use the excuse. While she was becoming more and more familiar with her body, her soul was becoming more and more a stranger. She sometimes didn't know what she would do until she did it.

What she did know, what her body was telling her, was that she was coming very close to the orgasm point, her breath was coming in shorter and shorter bursts, and her thighs seemed to want to clench down on something.

The door opened, her brother stood over her, grinning down at her, but there was a little meanness in the grin. "What are you doing?"

She opened her mouth, and as one part of her mind warned her of the trap, her lips and tongue were already in motion. "I... I'm.... uhhh.. cumming..." The last word was distorted, maybe not even finished as her body went into full twitch mode, the wave of pleasure overwhelming her, a fuck toy who'd managed to push her own buttons.

Keith watched her the whole time... or at least he was watching her when she couldn't help but close her eyes, and he was watching her when she finally opened them, breathing deeply to get air back into her body. Finally, he said, "You done?"

Susan shrugged and blew some of her hair out of her eyes with one of her big exhalations. She'd talked, but he must have missed it. She wasn't going to make the mistake again.

He held out a hand, and she reached for it, not with her own right, which was still resting along her still twitching pussy but with her left, and finally got to her feet, more with her brother pulling her than through her own efforts. The leash attached to the collar made a slap as it hit against the wall. "You know, traditionally, when dogs want to pleasure themselves, they just lick themselves."

I'm not a dog. Way to give mixed messages, expect me to act like your dog, while you help me to my feet. Her right hand fell to her outer thigh, wiping the wetness against her more dry skin there. She shrugged then, hoping he'd get the hint and tell her she could talk.

Instead, he took the leash in his hands and walked her into his room. She could see the work on his desk, the hentai manga he was working on now that the magic marker had turned him into a great artist. The page currently in progress did indeed show a girl who looked much like an anime-girl-version of herself in a collar bent over in the kitchen. Now that he'd almost caught up, did that mean he needed more inspiration?

"Did you enjoy that?" he asked, though she didn't know if he meant the recent orgasm or the recent dog-play, or perhaps even the time she'd had to herself. He did look at her like she was expecting an answer. She pointed to her mouth. "Oh, now you remember you can't talk?" The smile returned, the mean smile, the jerk smile. "Don't think that gets you off, I know you disobeyed me." She swallowed heavily. So hard to tell his mood when he was like this, whether it was a serious infraction or he was just trying to scare her. "Fine, you can speak, for now."

"I... you asked me a question, so I thought you wanted me to answer. I didn't mean to disobey, I'm sorry, I just got confused."

"I see. Well, I guess I should be forgiving, I mean... you were a little distracted, weren't you?" She nodded, able to breathe more easily. "You took care of yourself, then?" She shrugged. "So I guess you don't need me."

"I don't know. I'm still addicted to cum, thanks to you." She looked down at her chest. "And I'm still your fuck toy. So if you wanted..." She trailed off.

"Get on the bed," he said, and she let a smile form as she hopped into his sweaty-smelling but surprisingly comfortable mattress. The smile faded as she saw him reach into his pocket and pull out the familiar purple magic marker.

"What are you doing...?"

"I haven't decided yet. I've gotta punish you somehow, though."

"For what?" she cried, indignantly.

"I told you no talking, and you talked."

"You said you were going to be forgiving."

"I said I SHOULD be forgiving. But I won't. Guess I'm just a jerk." His eyes lit up. "Now, what new mark should I give you? Don't worry, it won't be anything TOO bad... unless you fight it, of course."

Susan had no intention of fighting it. She'd already made that mistake too many times. So she just lay back and watched as her brother loomed over her, inspecting her naked body as though trying to choose just the right spot to write on. She was concerned about that, hoped for somewhere that wasn't visible, but she was more concerned about what he wrote, which would define her until it washed off.

If he'd just gone and done it, it wouldn't have been so bad, but he drew the process out, talked about it to himself. "Let's see, what should I do? You got in trouble for talking, so maybe I should just make you mute. It certainly would save me a lot of trouble. Then again, what really got you in trouble was that brain of yours." He tapped her forehead with the writing end of the pen... luckily, the cap was still on. "Maybe I should just make you too stupid to do anything but follow orders. Maybe 'brainless'? Or 'spineless'?"

"You can't!" she said, despite knowing it was a mistake, the way his eyes grew dark even as his smile looked casually amused.

"Can't?"

She licked her lips nervously, then spoke. "I just mean... if you were going to write that... you have to be very careful, you know. If you wrote 'brainless' or 'spineless'... I mean, I might die. It's magic, it might make my brain go poof. If you're going to do it... I mean, at least write 'stupid', or... 'metaphorically brainless' or something like that."

"Hmm."

"I mean, unless you want me to die or something." If he did, maybe it'd be best to go out quickly... she loved her brother, even after all of this, and she thought he loved her, but if he really wanted her to die, would it be worth living? Maybe if she was just dead she could talk to God and ask what the hell he was thinking making a marker like that.

Instead though, he relaxed, smiled more naturally, tapped the marker against her forehead and then used his other hand to mess up her hair in that brotherly way she bother hated and loved. "Relax, dummy, I wasn't really going to write it like that. But maybe you're better off with your brain after all." That filled Susan with a proud warmth in her chest, and a feeling that maybe this would be okay after all. She even risked a smile. "Don't get too comfortable, I'm still going to write something on you." He looked away for a few seconds, then said, "Actually, you know what? Since you only spoke because you were cumming..." She brightened again... forgiveness after all? "...I think that's what we should do. I don't like the idea of you cumming on your own. You're only twelve, too young to be getting yourself off, and besides, you're my fuck toy. Really you should only cum when I say, right?" She remained still, not wanting to risk jinxing this... it wasn't a total pass, but it was better than she could have expected. He slid back along the bed so he could grab hold of her right ankle with his left hand, and lifted her leg up. He then put the marker to his mouth, held the cap in place with his lips, then withdrew the rest of the marker. Susan didn't struggle, even though it tickled as he wrote. The very first thing he wrote on her with the marker, before they knew it was magic, was 'Stinky Feet' and that was embarrassing enough, probably more embarrassing than anything else he'd written since, since everybody nearby knew. This time, she had a feeling it wasn't going to be as bad, unless he worded it poorly.

It felt long, whatever the words were, long enough that she started to feel a twinge of pain from being held in the awkward position for so long... but that was nothing new to her, she'd been held in more awkward positions for longer, since her brother developed his interest in bondage.

Finally, he let go, and while he recapped the marker and put it away, Susan scrambled into a partly seated position once more and lifted her foot to read what it said, exactly. "Can't Cum Without Permission," she read aloud.

"Yeah, well, you're my fuck toy," Keith said again.

Was she? The words on her chest only said 'fuck toy,' they didn't say whose she was. This was the same way. It didn't say whose permission she needed. Maybe it even meant nothing... could she give permission to herself? That didn't seem like it worked for anything else, but still, she'd have to try it while alone sometime... not with Keith, or he might amend it. It still made a decent punishment... it meant she would have to beg for her fuck toy orgasms, the one she'd previously achieved every time Keith came, which would probably do wonders for her brother's ego, but the conditions were better than she ever hoped, and her mind cycled through the possibilities, different shades of meaning of the words.

"Something wrong?"

Susan shook her head quickly. "No, but I was just thinking. Mom and Dad are going to be home soon. So it might be your last chance to fuck me before I have to get dressed and take off the collar."

"I wouldn't be so sure about that," he said, but he did reach for the button on his pants and then unzipped. "Edge of the bed."

Susan scooted over, turned on her back and raised her knees to her chest, spread slightly, so that he could have access to either her ass or her pussy. Both certainly had their advantages in her book. But he didn't penetrate her, instead he got on his knees, put his thumb to her first, sliding along with the rest of his hand along her slit but then dipping into the hole. At least she was still wet (even though her recent self-induced orgasm had beaten back her 'super-horny'ness for a little while), and already used to much bigger things, she just let out a gasp of surprise. "I've been thinking of what comes next," he said.

"Next?"

"I mean, you being my fuck toy is fun and all, but... you're so high-maintenance, you know?"

"That's kind of your fault. What you wrote. You could always change it."

"Hmmm," he said, like he was considering it, as he worked his thumb in and out. "You know you made me write those things. I'm not taking them back. Maybe, maybe I'll let them expire on their own, when the ink wears off." Her heart jumped, and not just from the stimulation. "If I get bored of you by then." Now she felt sick, like a sudden spike of fear combined with nausea, as she knew she wasn't sure she wanted him to get bored with her, even if it also meant her freedom. And, of course, if he was starting to think about that now, that meant he was already getting bored... it could leave her super-horny and addicted to cum for the last few days before the mark finally wore off. That would be a rough few days.

"What do you want me to do?" she asked, her voice unsteady. "So you won't get bored?"

"You? I'm not sure there's anything you can do. I mean, other than do whatever I say, whenever I say, but you're already willing to do that, aren't you?" She nodded. "I'm mostly just thinking out loud. But, you know what?" She waited until he continued on his own... it wasn't like what she said mattered much to him these days. "I think I'll skip fucking you right now. Save it for a little later, stretch out the fun, you know?"

"Okay, but..." she hesitated a second, then continued, "I need... you know, I need a..." What was the word Keith used before? The thing the junkies call it in the cop shows. "...A fix. Of cum. For my addiction." It was probably part of the reason she was feeling nauseous, that need, something wrong in her body that needed to be put right. It was easy enough to ignore when she thought her brother was going to fill her with cum that she could then fish out and slurp off her fingers, but now that he was telling her to wait, it was taking over her mind, like a mold growing over her conscious thoughts, threatening to become all she was aware of.

He withdrew his thumb, then leaned over her body and thrust it towards her lips. She opened them automatically, knowing he'd want that, accepting the thumb into her mouth and sucking on it like it was his penis, which she'd vastly prefer. "Here, have some girlcum then."

Girlcum? Was that a thing? Even at twelve she knew enough about biology that cum was mostly sperm, and that girls didn't make sperm, but both boys and girls were described as "cumming" when they had an orgasm. Maybe whatever came out when you were cumming was cum.

She began to suckle greedily, licking along his thumb trying to get every drop. Yes, maybe it was all in her head, but it did seem to be helping... it wasn't quite the same thing, she finally decided, there was no instant rush of pleasure and relief as when she drank her brother's cum, but it was close enough to push back the nausea, the all-consuming need, maybe like the stuff they give to drug addicts so they don't go through withdrawal, but don't get high either. If was comforting to know she could fight back her addiction with her own cum...

... if only she had figured it out before her brother took away her ability to cum without permission.

***
Chapter Four:

Keith left her alone after that first taste, not by leaving, but let her gather her own girlcum and drink as much as she could, while he sat at his desk, turned towards the computer and began to watch anime videos on it. He didn't kick her out of his bed though, so Susan, once she felt she'd gotten all she could, lay there, relaxing, watching his screen over his shoulder, and trying not to disturb him. At times she thought he'd forgotten about her entirely, but in a good way... like he was so comfortable that he'd let his guard down and let her see what he was like when he was alone.

Was a jerk still a jerk when he was just doing his own thing? Or was it a peek at the truer soul underneath?

Judging by what he was watching, her brother's truer soul liked dirty things an awful lot. The anime was of the hentai variety, though she wasn't sure if the word applied to cartoons or just comics. She couldn't tell exactly what was going on in the cartoon either... the subtitles were too small to read at that distance, and she certainly didn't understand Japanese, but there was a tiny girl with a much larger man and some kind of sex machine involved. Maybe he was looking for ideas of things to do with her, to not get bored. That thought that he planted in her head was already beginning to gnaw at her soul... she might not be enough for him. Even if the marks stopped working, she didn't want her brother to be bored with her, she wanted him to want her, to keep wanting sex whenever their parents weren't home.

Which was going to be a factor once more, soon. Her eyes darted back and forth to the clock every minute or so, and when she thought she couldn't safely wait any longer, she cleared her throat to get his attention from the girl on the screen who was screaming like an animal in pain or going through orgasm, she really wasn't sure. "I better go get dressed, they're going to be home soon."

She rolled her lower body off his bed and then pushed off. While she regained the balance of her feet, she noticed Keith had paused the video and rotated his chair around. "I'll come with you," he said. "To make sure you wear something I like."

He let her walk in front, which made her wonder whether she was supposed to get down on all fours and try to walk like a dog, but she didn't and he didn't say anything, so she just walked, trying to put a little bit of a sexy sway that her friend Dana had once tried to teach her, in case he was watching her butt. Maybe he could be tempted into giving her one last dose of the good cum after all.

Inside her room, Keith took up a spot holding up the wall holding her light switch, seemingly untempted. Trying not to look disappointed, Susan went to her dresser. He just watched, so she assumed she was free to choose something, at least as long as it was something he would like.

She made her first mistake when she went for her underwear drawer. She pulled out one of her normal pairs, pink with black trim, but before she could step into it, he said, "No..." It was the tone of voice you give a dog, not one who was doing something immediately bad like peeing on the carpet, but that you were trying to train to do the right thing and they weren't quite getting it. She dropped that pair and picked another one, then looked again to her brother. This time he merely shook his head, and Susan got the picture, or thought she did. No underwear.

That could be fun, sometimes, but in front of her parents? It wouldn't be so bad, she thought, if she was wearing shorts or something, but a quick test revealed that wasn't going to be an option either. As soon as she got some shorts, her brother said, "No, wear a skirt."

After a few more choices getting rejected, for being too long, she finally broke. "Well, if you're so concerned, why don't you come and choose something?"

Keith smirked, pushed himself off the wall. "Fine. But don't say I didn't give you a chance." He joined her at her closet, picked through what she had there, got an evil grin and made two selections, then handed them to her.

They were clothes she hadn't worn in a while, since before her last growth spurt at least. They were almost certainly due to be donated to charity when back-to-school shopping began. The skirt was pleated, pastel pink in alternating horizontal stripes, one slightly darker than the other. The shirt was a lime green shirt with a glittery blue outline of unicorn and the words, "Love This Life!"

The skirt once came down to mid-thigh, and the shirt comfortably to her waist, but that was before a growth spurt. "That's too small," she said.

"I think it'd look cute. Try it on."

Susan sighed, but knew better than to argue... she only hoped that he'd see how stupid she looked after a demonstration. Her hands went to the collar on her neck, with the attached leash, so she could remove it, only to find another unpleasant surprise. "Who said you can take that off?"

"They're going to be home soon..."

"And they're going to see you wearing that," Keith said calmly, and her heart sank. She had an idea of what he was planning... maybe not the specifics, but in general terms, he was going to push the line of whatever spell the magic marker had cast on their parents

So far, ever since the marker gave them complete faith in him, they had never questioned him even when things had gotten really suspicious. But that didn't mean he could get away with anything, did it? Faith only went so far, Susan assumed. She didn't think that if, for example, Keith told them Susan wasn't wearing a collar and leash, they'd believe their own eyes over him. So, she tried to protest, make him see sense, "This collar is Mom's." Or Dad's, maybe, but it made more sense that Mom wore it. Either way, it rose a lot of questions, but it would raise even more if they suddenly saw Susan wearing it. It would have to mean that one of them went digging around their drawers, in the hidden box Keith described which contained things like the vibrators and cuffs, and where they were most certainly not allowed.

But again, she knew better than to argue. He had the marker, and when he got annoyed at her, he was willing to use it. So she just gave him her best grumpy glare, and attempted to pull her already-too-small shirt on over the collar. It wasn't really that difficult... it was short but loose, and it had a wide neck hole, the kind where if she leaned over in front of someone she had to worry that they could see her training bra, if she was wearing one. That was the chief reason she hadn't worn it in so long, rather than the size. Maybe, she thought, her heart bubbling with excitement, it was one of the reasons her brother chose it, that he used to take sneak peeks at her, even back before he was a jerk. Now, it was a little less loose on her, and left her belly button exposed, and, looking down, she could tell that it was low enough that, while it may have covered her nipples when she wasn't bent over, anyone could clearly read "Fuck toy" on her chest. Together, it looked like the life she professed to love was that of a fuck toy. Or at least, that might have been the intent. The truth was, if she kept the neck hole properly centered and kept her back straight, it really only looked like it said "uck to." And to their parents, they wouldn't see anything at all... thanks to another creative inscription by her brother, they didn't notice any of the marker's writing on themselves or anyone else.

She took the skirt from his hands next, stepped into it and pulled it up. The waist was still stretchy enough that it wasn't uncomfortable, but it was definitely going to be too short, especially without underwear. It came down just to the blow where her butt began, and that meant bending over too far you'd probably see everything, unless she bent at the knee. Even worse, the colors didn't really go together, in her mind... bright lime green and pastel pink? "Can't I wear something more normal?" It wasn't arguing, she told herself, but maybe he'd respond to a request.

"Normal's boring. Besides, you're already wearing a leash, normal's pretty much gone out the window."

"Fine," she said. "But if I get in trouble, I'm going to tell them it was your idea." She wasn't serious... what good would it do after all?

Keith made the point explicit. "Yeah, but then I'll just say it was yours, and who are they going to believe? They don't have total faith in YOU."

No good response, so she just made a face, in one last hopeless effort to subtly plead to her brother to change his mind. He was a jerk, after all, and he seemed to love making her uncomfortable... and sometimes that was fun, when it was just the two of them. She didn't expect she'd get any pleasure out of it when it was in front of her parents, though.

Hiding in her room wasn't going to work either. Best case scenario she'd be called down for dinner and have to answer embarrassing questions then, but even that was denied, for when she tried to stay put as her brother left she realized, with a sudden lurch, that he'd grabbed the dangling leash. "No, let's go downstairs." When she didn't move right away, he added, "Come on, if you're good, I'll let you suck on my cock until they come home."

She hesitated a moment longer, just to try and make sure he didn't think that was a tempting offer, then started down the stairs. Of course it was a tempting offer, probably was going to be as long as she was a cock sucker and addicted to cum, but she didn't want him to know that, and she was dreading the things Keith might make her do in front of their parents. Half-dreading, anyway. At the very least, one-quarter dreading.

She did not wind up sucking her brother's cock, because he didn't unzip and whip it out. If he did, Susan knew that unless he started taking charge and doing something else with her, she'd revert to her cocksucker label and start doing that. But instead he just sat beside her watching daytime TV, and looking anxiously at Susan as the time that their parents usually returned approached. It seemed that, for all his jerky bravado, he did seem to have some last minute doubts about getting caught openly doing dirty things. How far did faith in one's son go, even if it was 'complete faith'?

When the front door finally opened, their parents trudged in, first Mom, then Dad, and this time not talking. It was a Friday, and although that meant they were finally free of work for a couple days, it also seemed to be when they were at their most irritable. Mom especially. Susan guessed that it was a matter of outlook... it was the same with school, you could either look at it like "Yay, it's finally the weekend," or look at it like "Ugh, I've just had to go through a whole week." Dad was more outwardly happy, but he could get angry if you got in the way of his attempts to unwind.

So they were distracted and a little tense, and maybe as a result, it took them about a full minute before they noticed Susan was wearing a collar and leash.

"What the..." her mom said first, freezing in the middle of the living room to stare at Susan as the young girl felt a blush flood over her whole face, maybe her whole body. Mom seemed perplexed for a moment, but her mouth worked soundlessly. Her face seemed to be getting red too. "What are you wearing?"

Susan responded with a shrug, so her mom asked again. "Where did you get that?"

"Get what?" Her dad walked into the room, looked her over, then quickly locked his eyes onto her neck. "Oh."

Awkward silence dominated for the next few seconds, although her mother looked like she was waiting for an answer. But Susan didn't know what to say. She certainly couldn't tell them the truth.

Finally, Keith broke the silence. "What? It's not that weird."

Their parents both looked at him, like there was a struggle going on in their minds between what they knew to be true and what Keith was telling them. "It's not that it's weird, son," Dad said. "It's that she shouldn't be wearing it."

"Sure she should." He said it full of self-assurance, and Susan knew he was testing the power of the marker, the faith they had in him. Would it mean they would never contradict him? "I mean, if she wants to, why not let her?"

Evidently not, or at least not completely, because Mom said, "It's not appropriate. Do you know where she found this?" Maybe they believed he was right but were too afraid of what the other one might say.

"Yeah, she found it in your room," he said, and he couldn't help to put a little smirk in it. "She said she was bored and went snooping. I don't think she knew what any of the other stuff was for..." He winked, then. "But she thought it might be fun to play doggy for the day and I didn't see the harm."

Mom exhaled sharply, then directed her attention right at Susan. "I'm disappointed in you, Susan. You had no right to go snooping around in our room. I expected more from you."

"I'm sorry," she said in a small voice, somehow feeling extra ashamed despite, or maybe because, she wasn't really responsible.

"You're grounded for the next two weeks." Susan's face turned into a grimace, but she didn't argue. Sometimes the same strategies she used on Keith applied to Mom and Dad. Not the sexual ones, obviously, but arguing with a punishment always made things worse.

To her surprise, Keith argued for her. "Whoa, isn't that a little unfair?"

"I know it looks that way but she has to learn that people's private possessions are..."

"No, no, I mean... isn't it unfair to me?" She stared at him, and he continued. "I mean, if you ground her, that means I have to stay home to watch her. And it's not like I did anything wrong."

"He has a point," Dad said.

"Well, she needs to be punished! This is not okay."

Dad put up his hands defensively. "I never said it is!"

"Oh, she should definitely be punished," Keith said, making Susan glare at him. The jerk. Sure, he might use her sexually in any way he wants, alter who she was, but... they should at least have each other's backs against their parents. She'd never try to get him in more trouble... at least, it had been a couple years since she had. Maybe this was payback for a tattling habit she'd long grown out of. You'd think making her a fuck toy would be payback enough for everything, though. He went on, "It's just don't do something that makes me have to watch her all the time. You know what you should do, ground her for the whole weekend, while you'll be home. And make her wear the leash for the whole weekend, too."

"It would serve you right," Mom said. "Believe me, you might find it fun now, but you'll get sick of it. But still, I don't think..."

Keith broke in again. "Or, you know, maybe she deserves a spanking."

***
Chapter Five:

Their mom looked at Keith, surprised, maybe a little conflicted at his suggestion. They'd both been spanked occasionally, but not for a long while... the family rule was that it was inappropriate except when you broke the rules in a way that was actually dangerous to someone, that only then was the pain justifiable, if it helped you remember never to do that again. This obviously didn't count... and yet, it seemed like because Keith had said it, maybe she had to reconsider. Finally she said, "No, I only want to make sure she learns, not hurt her."

"Oh... well, then maybe you should let me do it." Another stare, and he went on, "I'm not mad at her, so it's not like I'm going to be too hard on her. I'll be practically gentle... it'll just be really embarrassing. And really, doesn't she deserve a little embarrassment? For what she's done?"

"She does," Mom agreed, and she looked to Dad, as though seeking his permission. Dad, however, seemed to be staring at Susan, like he'd just noticed the shortness of her skirt or skimpiness of her top as well as the collar. Mom's eyes swung back to Susan herself. "I won't let your brother spank you," she said finally, but before Susan could decide whether to be relieved or disappointed at the news, she added, "Unless you agree. You did violate my trust by looking through our private things, and you need to understand how... how violated I feel right now. So I'm going to leave it in your hands. You can either let your brother gently spank your bottom, and we'll let this go with only a weekend grounding... or..." She paused, like she hadn't fully thought through the 'or' part of the plan. "Or we take away your computer and your phone privileges for the rest of the summer."

Well, that was hardly any choice at all. Either lose her ability to ever talk to her friends, and to write stories, until school started back up again, or let Keith do something he'd already done a few times since becoming a jerk, something that she was starting to find pleasurable despite herself and despite the fact that he was doing it much harder than he would be here. The only difference was that he'd be doing it in front of their parents... which was weird, sure, but the weird was coming no matter what. "I'll take the spanking please."

It turned out it wouldn't even be in front of their parents... at least not both of them. The moment Susan agreed, Mom looked at Dad and said, "Why don't you go upstairs, and change out of your work clothes?" It was said firmly, like it wasn't a friendly suggestion but rather something that she wanted and would probably make him pay for later if he refused. So he didn't.

He opened his mouth like maybe he wanted to, but closed it again, then opened it once more to say, "Yeah, I could probably use a shower." His voice conveyed boredom, but Susan thought she saw disappointment in his expression, like he had wanted to see how this turned out. He went for the stairs, glancing back every few steps until finally he was out of sight.
Mom gave a nod once he was upstairs. "Okay, but remember, gently... this is your sister," she said to Keith.

He nodded with a jerky grin on his face, then patted his lap. "Okay, you bad girl, come here and accept your punishment."

Susan leaned over and crawled on her hands over Keith's legs, which put her butt in the air and, made it clear for the first time that she wasn't wearing any underwear under her short skirt. She'd forgotten, at least until Mom's sharp, surprised, "Susan!" Then she began to blush. Both of them did, actually.

Keith spoke again, like it was no big thing. "Oh yeah, she's been walking around like that. I guess it's more comfortable when it's warm out. It's no big deal as long as it was around the house, trust me." Again, a trace of nervousness there, like he wasn't sure she would buy it but wanted to press on the trust granted by the magic marker. "Besides, this makes it easier for the spanking anyway." That really was pushing it. They'd never been spanked bare butt before. Well, Susan had, but only recently and by Keith.

Mom looked uncomfortable, but stood, hands on her hips, and watched with a frown, and so Keith slid the skirt up, exposing her bare ass completely, as well as the words "Likes Anal Stuff," words which Mom should be unable to see. Susan was more worried it might still show traces of redness from previous spankings. Or maybe it'd be obvious she'd been fucked. Did a virgin butt look different from a non-virgin butt? Would Mom know the differences?
Keith's hand lingered on the butt cheek, stroking it lazily, possessively, as he said, "I think twenty would be appropriate, don't you? Since they're not hard?" Mom nodded.

Susan didn't know whether the spankings would be hard, but she knew one thing that was... Keith. She could feel his boner hard against her stomach. And that was starting to make her super-horniness kick into high gear, even in front of their mother. She hoped he quit messing around and get it done before she started dripping in front of Mom!

Smack! There, it started... it wasn't even that hard... she could have taken harder, maybe even would have liked it harder, but since this was for Mom's benefit, not hers, she could hardly complain. Wait, actually, it occurred to her that maybe she should complain, or at least act like it bothered her more than it did. So, the next blow that landed, she squinted real hard and bit her lip and then said, "Owwww!"

"Oh, stop whining, I barely touched you!" The next one was harder, though, like he was trying to make a point. After five, he stroked her stinging buttock right in front of Mom, making her tremble and Mom just raise an eyebrow. But it seemed like she still trusted him. Even when, after two more hits, the stroking turned into an outright squeeze. She couldn't have missed that.

Susan thought there was no way he could get more bold than that, but she was wrong. At about twelve strokes in, which were once again the light kind, the pain just lasting for a few moments after contact, Keith suddenly said, "Stop squirming around so much," and, with the hand that wasn't being used to spank, reached up to her butt and lay a finger up between and then, after a moment of pressure, slipped inside of her.

The sudden penetration, unexpected because it was under the watchful eye of Mom, made her lower body arch upward against his hand.

"Keith," her mother said, in a warning and yet somehow not outraged voice. "That's not appropriate."

"What? It's not like I like doing this, Mom! I'm just holding her still. I mean, I could hurt her if she wiggles the wrong way when I'm spanking." The tip of his finger wiggled inside her, invisibly to Mom. "Besides, doesn't this make a better punishment? Your privacy was invaded, so Susan can feel a little invaded." The finger sank deeper.

"It still looks inappropriate," her mother said finally. "I might know you don't mean anything by it, but if anyone else saw you..."

"Okay. So this is okay as long as no one else sees?"

Mom looked in Susan's eyes and asked, "Is it hurting you? I mean, besides being embarrassing." Susan shook her head, but knew her face was blushing like mad. "Fine, you can hold her like that... but if she says it's hurting her, or someone else comes, you stop right away, understood?" Keith pulled his finger out of her asshole so he could make a thumbs up gesture, which he could easily have made with his other hand... maybe he wanted to slip the finger back in while Mom watched. "And so help me God, if your father finds out about this, from either of you..." Her mouth closed but worked like she was still chewing on something tough and unpleasant. "You'll both be sorry."

The excuse for the finger in her ass might have been to keep her from squirming, but in practice it seemed to have the opposite effect. It was kicking her super-horniness into high gear, and as the spanking resumed (somewhat lighter because Keith wanted to avoid hurting his own fingers), her ass moved like it was seeking the slap rather than avoiding it, although the truth was that she was just making her own friction on her finger, and her butt was clenching visibly as she struggled to get as much stimulation as she could.

He stopped when he reached twenty... at least, she thought he did. She'd lost count, so she'd have to trust him as their mother almost certainly did. He didn't remove the finger though, at least not until her mother came around and said, "Let me see..." At first, Keith just raised all but the finger inside her to get a better view of where he'd been hitting. "Stop making a fuss, Susan, he didn't hurt you any." A second later, a second in which Susan couldn't hold back another pulse of shameful pleasure that sent her pussy twitching and another bead of wetness to drip out, Mom added, "In fact, from what I can see he probably should have punished you more. You don't have to hold her anymore, Keith."

A few seconds later, her brother did pull out, allowing her anus to slowly contract, allowing Susan to take an uncertain breath that was ragged enough that it seemed to confirm what her mother must have realized, that she was turned on. She hadn't even really noticed she'd been holding it, but she'd had, in the way that she often did when she wanted to enhance the pleasure. But even without the breath, it had to be obvious, Susan felt super wet, and based on past experience she knew that her pussy was probably red and puffy, almost as though he'd been smacking that and not her ass. But he hadn't been, at least not mostly, and Mom probably knew what it meant. She seemed to be looking at her daughter with a disappointed look, and her head moved slightly back from side to side. "Maybe I should ground you after all," she said finally. "I have a feeling this punishment isn't going to motivate you to do better in the future. But your brother's right, that isn't fair to him, so I'll let it go, if you promise not to go snooping around in my room again."

Could she promise that? Keith could probably force her, somehow. Then again, she didn't do it this time, so if she promised not to, and had to break it, she'd already taken one punishment for that, and they would just be even. "I promise."

"Okay, you can let her up then, Keith."

"She might be more comfortable staying like this for a while," he suggested. Bare ass up over Keith's lap. "I mean, sitting might hurt." His hand ran softly over the cheek, almost lovingly but raising goosebumps of pleasurable anticipation of another hit.

"I'll get her a pillow. Your father'll be back down any minute and it's not appropriate for him to see her like this." Mom reached for Susan's arm and gently pulled her up to a standing position, which would at least feel better than sitting, and she continued. "Besides, you probably need to get in the kitchen."

Keith just looked amused. "I do?"

"Well, you showed such talent cooking last night, I thought you might like to do it again. Just... for God's sake, wash your hands first."

He smirked. "I would make something..." he said, and to Susan's surprise he seemed like he was actually considering it, rather than it being another chore he'd just been assigned. Maybe being a good cook included liking the job, just like being a fuck toy seemed to. "But you really need to go shopping first, we don't have a lot I can work with. You know what would be a better idea? Just order us a pizza for tonight, we'll go grocery shopping tomorrow."

Susan couldn't tell if it was her trust in Keith's judgment or if Mom just really didn't want to cook on a Friday, but she thought that was a great idea. By the time the pizza was ordered, the whole incident seemed almost forgotten... Susan still wore the leash and collar, and her dad seemed to be looking at her a little weirdly because of it, but she could sit normally with only a little soreness and she didn't think he'd realized that she wasn't wearing any underwear. That didn't entirely surprise her... she first learned the word "oblivious" because Mom had described him that way, and it was a fitting description. What did surprise her was that Mom didn't insist she go upstairs and change. Keith had said something to her, though, and maybe his faith magic had convinced her against all reason again.

But things settled into a sort of normalcy... so much so that when the pizza arrived, Susan went to the door, as she usually did, to help carry it, having completely forgotten she was wearing a collar. The pizza man visibly drew back as his eyes fell on her, which reminded her, and reminded her mother, who was at the door paying for it. She mumbled, "Kids these days, you know?" when he finally handed the pizza over, then gave him his tip and took the drinks. At least Susan remembered fast enough that she didn't turn around until the door was closed, so he might not have seen the trailing leash, much less any lingering redness that might have remained on her upper thighs from the spanking session. When she turned, she realized even Keith looked momentarily scared, like he realized how dangerous it was, and with a start, Susan remembered how low the neckline of her shirt dipped. He might have seen the word Fucktoy on her chest, though, or at least 'Uckto'. Maybe he'd think she wrote the name of a band on herself or something, but... what if he put together the missing two letters? He didn't seem to speak very good English, though, judging by the thick accent when he repeated the price before she showed up, she could just hope he wouldn't tell anyone except maybe ranting to his family about American kids.

That scare was only a minor blip, the pizza smelled too good and everyone was too hungry to dwell on it for long. They sat at the table and ate like a family. Normally, Mom or Dad would ask how Keith and Susan spent their day... this time, they didn't, as though they already knew on some level, or maybe they just took the story Keith gave them about Susan choosing to pretend to play doggy all day and didn't find any of the details interesting.

They did, however, talk about their own days, and something Mom said made Keith sit up and take notice. After complaining about something with a customer, she added, "Oh, and Devon was messing with me all day."

"Oh?"

She rolled her eyes. "Yeah, he was saying for a while I had something written on my..." She popped a lone pepperoni from the top of her pizza in her mouth, chewed, and swallowed before continuing, "On the back of my neck. Like, to try to convince me that you wrote 'sleeps too much' or something on me while I was asleep."

That was when Susan looked at Keith, and noticed he straightened up and looked at Mom. Both of them knew that Mom actually did have something very similar to that written on her, when Keith wrote "Deep Sleeper" on her, and Dad, so they wouldn't wake up when he wrote more on them.

Susan's look was out of worry, and she wanted to catch her brother's eyes to imply, 'See?' so he'd get how dangerous it was to just write things on people. Mom and Dad might not be able to see the writing, but others could. Keith, though, his look wasn't worried exactly. His eyelids narrowed and practically squinted at Mom, like there was something not quite right. "Oh, he did, huh?"

"I mean, it was totally stupid. Your father doesn't play stupid tricks like that. But Devon just wouldn't let it go. I even looked in a mirror just to be sure you didn't do anything."

"Well," Keith said. "Maybe you shouldn't associate with him. If he's going to be a liar like that."

"Oh, he was just fooling around. He's just got a very strange sense of humor."

"Uh-huh." His face was grim and unmoving, like stone, but after a few seconds he said, "I'm about done. I'm just going to take a few slices upstairs with me. Don't worry, I won't make a mess."

"I know you won't." That would be a first, Susan thought, but then, their parents still both had faith in him now.

"I'm going to go too," Susan tried, but received a glare from Mom and she stopped moving and settled back into her seat.

"No, you stay here until you're done, then wash up. I don't want you getting greasy hands over everything."

It wasn't that long a wait, she just finished one more slice, then cleaned her hands and finally climbed up the stairs to knock on Keith's door. She was curious about what made him leave so quickly, but also, her horniness was starting to get up to irritating levels again, and she needed him to take care of it, even if she had to beg.

He opened the door, still looking angry, but it didn't seem to be at her this time, because his features softened when he realized who it was. "What?"

"Can I come in?" She looked behind her, just in case, although she knew her parents wouldn't be able to see her unless they ninja-walked up the stairs, then lifted the skirt to show off her pussy, hoping he'd get the hint.

He stepped aside, let her in. The horniness still remained, but since she was feeling good that he wouldn't deny her urges right now, she decided to satisfy her curiosity as she climbed onto his bed. "What happened downstairs at dinner?"

"Huh?"

"It's like you were mad at Mom for some reason."

"Oh, that." The frown returned. "What, you couldn't figure it out?"

"So Devon saw what you wrote. The pizza guy might have too... I'm more worried about that." And you should be too, she made her tone convey. "It's not her fault that he saw. She didn't even know it was there."

"Yeah, but... I never wrote it on her neck."

"Where'd you write it?"

"On her back."

***
Chapter Six:

It didn't hit right away... Susan just shrugged at the revelation and said, "So? Back, neck what's the difference?"

Keith connected the dots, pointed to his own side at what presumably was the height he wrote it. "So how did he see it?"

It hit her then, a roiling feeling in her stomach, an implication she didn't want to accept. There had to be a rational explanation, other than that Mom had taken off her shirt in front of her co-worker. It was just from behind, anyway, that could be innocent. "Maybe... maybe she got some, like, printer ink on her shirt and pulled her shirt out to try and wash it out."

It was a lame thought, even though Keith said, "Yeah, maybe," his tone suggested he didn't believe it and that she was stupid if she did.

She pictured her parents getting divorced, maybe even them being split up to live with a different parent each. "So what are we going to do?"

"Don't worry, I'll handle it," he said. "I'm going to have a little fun doing it, too."

That only helped Susan's worries a little... after all, as a jerk, he could have some pretty mean kinds of fun. She wasn't sure she wanted to know, but still she asked, "Like what?"

"I said I'll handle it. Don't you have faith in me?" Susan almost shrugged, but decided a nod was the better call. She didn't want him writing the same thing he wrote on their parents, complete faith in Keith... somebody needed to be able to tell him if he really was doing something stupid. Like when she warned him about how their parents might react, or about using 'metaphorically' if he wrote certain things with the marker. "Good. In the meantime, I think it's time for a little more fun. You need a little relief, don't you?" Another nod, this one much more enthusiastic.

To Susan's relief, he didn't have anything weird or elaborate planned... at least, not right away. He just pulled his pants down, gently guided her legs apart and started using her as a fuck toy, and she got to experience the wonderful feeling of being taken, felt, used even, her arousal growing with the thought of it, even as she was aware that she'd need his permission to finally cum. That was the only worry, that he might withhold that, just to be a jerk. He thrust into her aggressively, heedless of the noise he was making as the bed moved with their motion, and she was just trying to get her mind clear enough to find a way to warn him about making too much noise when he said, "Aren't you being a little quiet?"

"... what?" she whispered between breaths.

"I think..." he paused as he pushed onto her and withdrew, in the length of a second, and continued, "I want my fuck toy to be loud tonight."

And just like that, like a switch was flipped on in her head, she began to moan, loudly. It didn't matter that her parents might hear her... or, perhaps it mattered, mattered a lot, but it didn't stop her, because it was written on her skin that she was a fuck toy, and that meant Keith's desires for how she fucked overrode her own, and even her own common sense. Whereas before she was biting her lip to keep from accidentally letting out a peep, now each thrust was punctuated by a yelp-like moan, rising in pitch and intensity and sounding like something out of a bad porn movie.

Keith wasn't satisfied with that, either. "Why don't you bring back the dirty talk, too?" He had a smug look on his face, and Susan knew that this was planned, the next step in his humiliation campaign, or maybe testing the boundaries with their parents, it amounted to the same thing no matter what the goal was.

But again, no matter what the goal was, she didn't have any choice in the matter, as a fuck toy her vocabulary, like her volume, responded to the desires of the one playing with her. "Oh, god, yes..." she found herself saying, at a level that might be lost in television background noise, if they were watching television. "Fuck me, fuck me harder." She had enough of herself and her own free will that she could also say, "This is a bad idea," and that itself could be whispered because she had intended it to be, but immediately afterwards she followed it up with "God, I love your cock!" at full volume.

"Dirtier," he prompted.

She found herself yelling out, "Yes! Rape my fucktoy cunt... pound your whore until she screams!" It didn't even make sense, it certainly wasn't rape (or was it, if the marker made her do it?), and she didn't technically think she was a whore, but it didn't matter. It was simply the dirtiest thing she could think of.

"Oh yeah, you want that?" he asked, a light coming on in his eyes. And soon, maybe because he did pound her harder, inspired by her loud dirty talk or whatever ideas it provoked in him, she did scream, a scream that rose and feel in pitch with their shared motion, but not as genuine a scream as she'd given before, still play-acting. The scream did remind her though, of a growing need, as she was getting pushed closer and closer to the edge of where a real scream should come. Because she also knew that no matter how close she got pushed, she couldn't quite reach it. Not unless Keith gave her permission, anyway. And now, her dirty talk had a purpose.

"Can I cum?" she begged. "Please let me cum, I'll be such a good whore for you, just say I can cum, I need it so bad, let me cum all over your cock while you pump me full of hot sperm and fuck a baby in me!"

As those last words slipped out, Susan wondered if she had perhaps made a mistake... Keith certainly couldn't want that, and he'd made her infertile so it couldn't happen anyway, but it was a dirty thought, a thought she found both scary and terrifyingly exhilarating, a thought that might have pushed her over into her own orgasm, and not just a fuck toy mutual orgasm, if only she'd been allowed to have one.

Yet he leaned in close, almost overbearing on her, and pinning her wrists to the bed with his hands, close enough for a kiss, but he didn't he just said, "Well, when you put it like that, I guess you can cum... but only if you do it loud."

It wasn't instant, it wasn't a command, just permission, conditional permission even, but the knowledge that she had that permission was liberating and even eased back on the pressure. She would cum, she knew, when he did anyway, so she only had to speed that along, and she put her hips into motion, fucking against him and squeezing down inside. Keith must have been already close, though, because after a few seconds of that he kicked into his own frenetic motion and started cumming, and at first Susan wondered why she wasn't experiencing the obliterating white joy, then remembered the condition, and began screaming, "Oh yes, fuck meeeeeeee," and shortly after that went wordless, and yet still very loud.

When he'd done squirting inside of her, he let go of her wrists and both pushed himself off and pulled himself out of her, and it seemed almost the moment that the head of his cock and slipped out between her vulva she was returned to herself, no longer forced to act like a sex toy.

Mostly returned to her old self anyway. She did sit up and began the routine that had become almost reflex now, digging into her own dripping wet pussy, not for extra stimulation but to gather as much cum as she could and ferry it to her hungry mouth to feed the addiction he'd planted in her. But, she no longer had to scream, she no longer had to be exactly what Keith wanted, she could rebel to the limited degree that was safe, with her emotions, with her expression.

To that end, she glared at him as she sucked cum off her fingers. He didn't notice at first, because he wasn't looking at her. He went to check for any messages on his computer of which there didn't seem to be any, and reload a few websites, but eventually looked back at his little sister and her sulk. "What?"

"Why'd you have to do that? You know they probably heard that!"

He grinned. "Yeah, but, you know what? They didn't come up. Obviously they didn't think you were in any danger. Isn't that a good thing?"

"I don't care, I don't want them hearing me. It was so embarrassing! Humiliating!"

The grin faded, but his eyes still danced with delight, like he was planning something fun. "Oh? Well, that's a shame. I guess it's going to be awkward the next time you see them, huh?"

She gritted her teeth, knowing she was playing into his game somehow, but she still had to say it. "Yes it will!"

"Especially since you're going to have to ask them if you can sleep with me tonight."

Susan's mouth dropped open for a moment, then she said, "Shouldn't you do it? They may let you get away with everything thanks to the magic marker, but they still treat me the same." Almost the same. Letting her brother spank her isn't quite the same treatment she usually got, but it was part of how they were letting Keith do what he wanted.

"I think it'd be more fun if you ask. You can come call me if they have any doubts, but I want them to see this coming from you. See how they react."

"Please, Keith? I really don't want to."

"You don't want to sleep with me?"

She nodded her head quickly. She did want to. She had last night, and there was something wonderfully warm and comforting about it. But asking her parents? Even the thought of it made her feel like she should blush. "I do, but..."

"Then I'll leave it up to you," he said. "If you get their permission to sleep with me, then we'll sleep together in my bed, and I'll be here if you get super-horny in the night. But if you don't want to embarrass yourself by asking... well, then, I guess you sleep alone. I'll be locking my door, so don't count on me to help you until morning. And it's a Saturday tomorrow, so I'll be sleeping in until long after Mom and Dad are up." He then looked upward, as though just thinking of something. "Though I do want to tag along for grocery shopping, so maybe I'll just wake up when they do." He shrugged. "Either way, you'll be on your own. Your call, I honestly don't care."

She didn't like that thought, but she didn't want to beg to sleep with Keith in front of her parents either. "If I have to sleep alone, can I at least have permission to cum during the night?" she asked, already knowing it wasn't likely.

Keith made a show of considering it, then grinned. "No, I don't think so. I mean, what have you done for ME lately? You won't even swallow your pride and ask Mom and Dad to sleep with me."

Sometimes he made her want to grumble under her breath. "Fine. I'll ask. But after a shower." She still hung onto hope that maybe they didn't hear her yelling out, begging him to get her pregnant, maybe they were watching loud TV or something. They might let her if she asked after a shower, because of their complete faith in Keith... but if she came down smelling of sex, she didn't think they possibly could.

"Whatever. You probably could use one anyway."

"Jerk."

"Damn right."

***
Chapter Seven:

Coming out of the shower was a wonderful feeling, although lately, the sensation of cleanness wasn't as strong as it used to be... Susan no longer could look down at her body and see fresh unmarked skin, she would always see the words her brother wrote, she would always look dirty, and that made her feel dirty, even fresh from the shower. If she closed her eyes, she could just take in the smell of soap and shampoo and recapture some of the feeling by trying to forget the writing and the fact that she spent most of the shower sticking things--ranging from her fingers to a toothbrush to a shampoo bottle--up her butt (it was just an easy way to make a boring shower more entertaining). Maybe it changed nothing, but, she thought, it might make it easier to pretend she was just an innocent little girl again in front of her parents. Several deep breaths with her eyes closed as water slowly drained off her skin and hair and Susan almost felt like her old self.

She wrapped herself in a towel, and decided to go downstairs like that, instead of dressing. It was something she sometimes did before, so it wouldn't look out of character. And it seemed like her dad was a tiny bit more indulgent when she did, like if she wanted to stay up later, or needed permission to go somewhere. It might not matter, but every bit was sure to help. She also left the collar and leash on the sink. Neither Keith nor Mom had outright said she had to keep wearing it for the whole weekend, it was just suggested. Nobody said she should take it off after the spanking, either, so maybe it was supposed to be part of her punishment. But obviously the collar was some kind of sex thing and she didn't want her parents thinking about anything sexual when she asked them if she could sleep with her brother.

Still, she took her time going downstairs, building up courage. Her parents were there, watching TV with the lights down low, and it did seem pretty loud. Maybe they hadn't heard what happened earlier. She walked barefoot up to the couch, and waited, not wanting to interrupt, until they saw her.

Mom looked over first. "Oh, uhm.... why aren't you wearing your leash?"

Susan blushed. She looked over to her dad and realized, even in the dim light that made everything seem a little blue, he was blushing too. Completely red, and he wouldn't look her in the face.

"Um... I don't think I need to wear it anymore." If pressed, she thought she could argue she meant that she didn't think it was part of her punishment, or if it wasn't then she was just saying it wasn't fun.

"I'll bet."

Dad stood up suddenly. He still didn't look at her, just said, "Well, I think it's time that I head up for bed," and he said it really fast and mumbled.

He wasn't this bad when he first saw her with the collar, or during dinner, but suddenly he was very clearly uncomfortable and didn't want to be in the same room with his daughter. Susan could only think of one reason for that, that they'd heard some of what she shouted. Dad didn't want to deal with it. Neither did she, really, but it stung that he seemed to reject her so completely for it. They passed by each other and he didn't even say goodnight, or kiss her on the cheek or forehead like he often did, didn't even look at her face, just her chest, as though she could see the words "Fuck toy" that were barely visible above the towel. He shouldn't be able to, but maybe that's what he saw when he looked at her anyway.

Mom, on the other hand, sat with her arms folded, one leg bobbing anxiously over the other, and her jaw working like she was trying to decide what she was going to say. She waited for Dad to get out of the room first, and Susan knew that as soon as he was gone, she was going to say something, blame her for seducing Keith, maybe, but whatever it was, she didn't want to hear it. The only thing she could think of to say to cut her off was what she'd come down here to say, what she'd practiced in the shower and on the way down the stairs, and that didn't seem like it would help any.

And yet it was the only thing in her mind, so, she blurted out, "Um, I was wondering if it'd be okay if I slept with Keith again tonight."

Mother and daughter stared at each other for a few seconds. Susan wondered what must be going through her mother's mind, hearing her two children have sex and then her little girl asking to be in his bed all night so he could fuck her some more. She should be outraged, call them both perverts, maybe even call the police.

Instead, she said, "Maybe that would be for the best. I mean, if you've been having trouble sleeping. But don't expect to make a habit of it."

Susan already turned, barely even getting out a "K, Thanks, Bye," before she too was fleeing the room for the safety of a less awkward part of the house. She couldn't believe it, didn't understand it, and yet... was starting to feel good about it, in the same way you feel a little giddy finally being done with reading a book report in front of the whole class after dreading it for days. At least it was over and she got her permission. Maybe, even, Mom had accepted what was going on between them.

She thought she heard a sigh from her mother, followed by, "But put a nightshirt on or something this time!" Well, she would, because her mother asked her to, but she didn't think she'd be wearing it for long. In fact, her mother hadn't asked her to wear panties, and she knew her brother liked them off, so that's how she dressed when she knocked again on his door, just in a long short-sleeved seafoam blue shirt that stretched down to mid-thigh, with "I (heart) Sweet Dreams" written on the front, only the heart was a heart-shaped cake or donut with frosting and sprinkles on top.

She heard the sound of the door being unlocked, and her brother stood there, wearing just boxer shorts. "I did it."

He raised an eyebrow. "Did what?"

Susan exhaled in frustration. He'd forgotten already? "I asked if I could sleep with you."

"Oh, that." He looked completely unconcerned. "So how did it go?"

"Well, Mom said yes."

"No, I mean, how did it go? How did they act?"

She didn't want to remember the details, but knew Keith would press, so she said in a small voice, "Dad looked embarrassed and he just left as soon as I got there. Mom, well, she seemed like she was mad at me."

"Not me, though, right?"

"No." He nodded. "She did say I should wear a nightshirt..." She tugged at the cloth she wore.

"Yeah, I heard." She must have made a face, because he added, "What? I told you I'd have your back. I listened in on the whole thing."

So obviously he acted like he'd forgotten just to be a jerk. Still, she liked that he actually did care, he actually did have her back. So, she pulled up her shirt, exposing her lack of panties and hoping to get a smile from him because she'd done what she knew he'd want. And it worked, which emboldened her to say, "But I mean, nothing says I need to keep wearing it, right?"

"Nah, keep it on," he said. "It looks cute on you." Susan beamed. At least until he added, "Plus, it'll be fun to see how they act when it's ruined with cum stains."

***
Chapter Eight:

By the time it actually came time to go to bed, Susan super-horniness was starting to kick in. Part of that was because they didn't go to bed immediately, but this time did the sensible thing and waited for their parents to fall into their nightly deep sleep. Mom did briefly stop in to say goodnight, and Keith was at his computer while Susan waited under the sheet. She didn't give them any warnings or advice beyond, "Don't keep her up too late," to Keith, but it was half-hearted, like she didn't really worry about it but that was a thing a mom had to say.

Once she left, Keith did keep her up, but not in a fun way... she was forced to watch as he killed time, some drawing of his comic, sometimes staring off at his computer screen, but none of it involving paying attention to her beyond answering the occasional question. When he started getting annoyed by those, she kept her mouth shut... at least until her pussy was starting to slicken up and get hot again, and she felt the craving to drink cum. "Come on, Keith..." she finally whined, after she began to feel unsatisfied with thigh squeezes and needing something more. "Come to bed."

"Not yet," he said distractedly.

She let out a grunt of frustration, then decided to try and take care of herself, rubbing her pussy with her hand. She really wished that she still had the vibrators from Mom, but Keith had packed those up, along with the rest of the bondage gear except for the collar and leash, and left it back in the master bedroom room before they came home. Not that she'd be able to cum, now, no matter what she did, unless she caught Keith in a distracted moment, asked for permission and got it automatically, but she didn't think so, and that wasn't the point, masturbation helped, a little, like scratching an itch, even knowing you were also making it worse, and if you did it too much without permanent relief you'd suffer for it later.

She flipped the sheet down to her knees after about a minute, deciding that, maybe, if she put on a show of how desperate she was, she could convince Keith to come after her. The nightshirt pulled up to her chin, she spread her legs and thrust her hips upwards, grunting as she wordlessly begged for attention.

She got it, but not the kind she wanted. He glared over in her direction after a couple minutes. "Would you quit your squirming?"

He spoke in hushed tones, so she did as well. "Well, what do you want me to do? I'm super horny. If you'd come and fuck me I wouldn't need to squirm. Or I could come to you, if you wanted..."

"Yeah, well, I don't want any noise until Mom and Dad are asleep."

She stopped, lowering herself back to the bed and slowing down to just a soft stroke around her slit. Oh, that's what they were waiting for? "I can be a quiet fuck toy if you want me to, remember? I won't make a peep."

A flash of irritation crossed his face, and Susan knew somehow that he had forgotten that, and didn't like that she'd thought of something he didn't. "Maybe you won't, but the bed will," he said finally.
Did she dare push one more? "You could write 'quiet' on the bed," she suggested. "With the marker. Or 'soundproof' on the wall, even."

The squint told her that he hadn't thought of that either, but at least this time he wasn't mad, he seemed to be more concerned with considering the possibilities. "No," he said finally. "I LIKE making noise. Just at the right time. Not when people are trying to sleep. Geez, you're so inconsiderate, Susan."

She couldn't help it, she pouted. "What am I supposed to do, then?"

"Well... my eyes are getting tired of staring at this screen. Maybe we could do something real slow. You know, just lie together with my dick shoved up your ass. Would that help you?"

"It might!" She could squeeze back against it, flex her butt repeatedly, and not make too much noise. It might be hard to cum that way, unless she made him cum and she had his permission to be a proper fuck toy and cum when he did. And if she didn't have his permission, nothing she did would matter anyway. "Let's give it a try." She turned onto her side, her back to him, and poked her butt outward to provide him a tempting target. He joined her, sitting on the bed first, then pulled one of her still tender buttocks upward, exposing the hole and her pussy. She hoped he took the hint and went for her ass... she'd already fingered her pussy to the point that it wasn't as exciting as feeling something in her ass again, even if it hurt more when it pounded, maybe that would make it even better. Either he read her mind or she got lucky... she shivered with anticipation as she heard the sound of him spitting into his hand, which he only did when he was about to slide into her driest hole.

He rubbed her around the asshole, fingertips grazing it and making it twitch like it had a mind of its own, and desires that matched Susan's, then Keith went to spit again... and stopped. "Shit, why the hell am I doing all the work?" Yeah, Susan thought, my pussy's dripping wet here, you can just rub it around. "I mean, speaking of using the marker to make things easier on us."

Her heart dropped. "Uh, what?"

"Three words. Self-lubricating asshole."

The idea didn't fill her with the same enthusiasm that her brother apparently felt. It was more of a mixed-feeling. Not having enough lube was sometimes a problem, although not much of one, because usually when she was super-horny she was also super wet, and she could just use that. And though it hurt a little if she tried to put something in that was too dry... she liked the pain, too. Maybe just because it was part of "anal stuff" that she loved, according to the Marker. "Is that really necessary?" she asked.

"Oh, come on, imagine your butthole as wet as your pussy," he said. "Wouldn't that be sweet?" He got off the bed and opened the drawer, fetching the old lockbox he'd remembered while they were first playing around with bondage, a birthday gift from a friend years ago that once stored a USB key of dirty cartoons where their parents couldn't stumble upon it, but now held the marker when he wasn't using it, held safe with a combination lock that Keith once had on his locker. Susan didn't know the combination.

The time it took to unlock it only gave her a few seconds to think of an excuse to stop him, or decide if it was something she did want and embrace it. Maybe it would get him to fuck her ass more, and that would be good. On the other hand, she had a sudden vision of her ass constantly dripping, even when she wasn't using it, ruining any clothing whenever she sat down, maybe even making poop slip out when she didn't want it. Maybe that made an excuse... if it didn't make him want it more, to embarrass her. She decided to risk it... poo was disgusting to everyone, right? "Yeah, but, like, what if it made like, constant diarrhea or something? I mean, if it was wet all the time down there."

Marker now in his hand, Keith considered it. "You're right," he said, but then instead of putting it away, he advanced with it and added, "I'll reword it. Roll on your back."

She did, and asked, "What are you going to write?" If she couldn't stop him, at least she could keep him from making a mistake. For that matter, what if he spelled something wrong?

"How about... 'asshole lubes when touched?'" he suggested.

She thought it over, but there didn't seem to be an major problems with that, nothing that seemed like it could be easily misspelled. "Okay. That seems fine." She might miss the little bit of pain from things going in dry, but it was probably a bad thing that she even started to like it... if she stopped being able to feel it, then it would be almost as good as not liking it. Her butt reflexively twitched as she felt the wet pressure of the felt tip against her skin, but she stayed steady and let him finish. She was pretty sure he'd written it just around the same place as "Loves Anal Stuff," which seemed appropriate. And at least it wasn't a new area that she had to worry about covering.

The cap clicked back into place, and she looked back at that moment, watched Keith admiring his work, gently touching her butt, which was still extra-sensitive but at least not exceptionally sore from the spanking earlier. Beside that sensitivity there was a new sensation, a slight tingling sensation around her butthole itself, like it was moving somehow without moving. Maybe that was what it felt like when a part of her body changed so it could do something, like make lube, that it hadn't before. It had to come from somewhere, right? And through pores or something.

Keith seemed to sense this line of thought, for he asked, "Feel any different?" He let go of her butt and went to return the marker to the lockbox.

"Feels a little weird," she said, and as she did, the tingling vanished. What replaced it was a sensation of slipperiness, like someone had squirted a single drop of oil right in the tight ring. But... "Keith..." her voice trembled a little with worry. "You're not touching me."

"Well, give me a second," he said, as he closed the box, reset the lock.

"No... you're not touching me! But I'm getting slippery!" She rubbed her body against itself, flexing the asshole, feeling it comfortably loose and sliding freely. Wait, 'when touched'... was she always, technically, touching her own body?

"Oh, that." He shrugged. "I might have improvised a little while I was writing."

A groan of frustration escaped her. If she dared to convert it into words, it probably would have been "You bastard!" but instead she just asked, "What did you write?"

"It's not THAT different," he insisted. "'Asshole Makes Sex-Lube When Horny.'"

"But I'm always super-horny!"

"Not always," he pointed out. "Otherwise I wouldn't get any sleep." He crawled into bed beside her, nudging her onto her side. She felt a drip slide out of her asshole. At least it wasn't a torrent, though. And she was around her most horny, so maybe it wouldn't be too bad and she could get used to it. She was still pissed at him, but that too she'd gotten used to and forgave quickly.

Keith tested his work with his fingers first, slipping his hand in ahead of his cock and pushing his index finger against her hole. It slid in easily, and although she still clung and squeezed tight against it, it seemed to move more freely and felt pretty damn good that way, enough that she let out a small moan.

"Quiet, fuck toy," he said, and she couldn't speak, or moan. He'd suggested that he wanted her quiet before, so their parents would fall asleep but apparently it only worked when they were actually fucking, or made it explicit.

The finger retreated, then it was soon replaced with something much bigger. But she easily stretched around the bulbous cockhead, the widest part, and after that, it was just like any other fuck except she was all lubed up. It didn't feel excessively wet, just smooth enough to make it easier. "Yeah, this is much better," Keith whispered, and Susan found herself agreeing when he pushed deep into her. "Okay. Now I'll fuck you properly later," he said. "Until then, try and get some rest."

She wanted to groan again, but couldn't. She'd forgotten that part, in all the confusion, that they were just supposed to lie together until Keith was sure their parents would be asleep, deep asleep. It wasn't without its upsides. It still counted as 'anal stuff' so she loved it. If it wasn't for her super-horniness, she'd have been totally content to spend the whole night like that without movement. It was like an ultra-close form of snuggling, him actually inside her, like they were two halves of one person. And although her ass no longer stung on contact, she might not have been able to take the vigorous pounding she wanted after that spanking earlier. But now, with that anxious feeling that seemed to spread outward from either her pussy or her stomach (it had all blended into on undifferentiated area), she wanted more, even though she felt constrained by her brother's desires. As a fuck toy, it seemed, if he wanted a fuck that didn't shake the bed in the slightest, she had to comply.

Squeezing around the cock in her ass seemed to be her only option, but she knew from the vibrator that it wasn't enough to get her the pleasure she wanted, and besides which, she needed permission to cum, permission she couldn't even ask for when he told her to be quiet, so eventually she gave up and, somehow, drifted to sleep.

Susan awoke to another void inside her, and she realized that she was alone in her brother's bed. She wouldn't have thought that she could sleep through his dick pulling out of her, and yet somehow she had, and more, him getting out of the bed and leaving the room entirely. She wondered if he'd somehow managed to write "Deep Sleeper" on herself as well, without her noticing it. It was something to check for sure later in front of a mirror, but she didn't think so... it was, after all, still dark out, so she couldn't have been sleeping that deeply... she was probably more tired than she thought.

Tired, but still horny. And now curious, as well. Was it just a bathroom break, or was he off doing something, making more alterations to their parents?

She rolled out of bed, yawned, and walked through the open door and down the hall. The door to the master bedroom was also open, just a crack, which confirmed her suspicion. There was also some kind of light on in there, and if their parents weren't awake now, they weren't likely to wake up from her, so she dared to slip in.

There was Keith, of course, with the marker, and writing on Mom's bare back by the light of a flashlight. There seemed to be a fair bit there, although she wasn't close enough, and the light not bright enough, to make out more than the letters "n's cock."

"What are you doing?" she whispered.

Her brother flinched, whirled around, guiltily made to cover up her back with the blanket, then calmed. "Nothing. Just making a few changes around here. Trust me, it's for the good."

Just before she spoke, she saw the letters "so" before "n", and put together that he'd written something about his own cock on their mother. Her mind filled in possibilities like "must suck son's cock" or "will never refuse son's cock," and her heart sank. Bitterly, dejectedly, she asked, "So what, you're going to make her your fuck toy too?"

"Only if she's really good," he said. "Maybe I could use another fuck toy. Does that bother you?"

Reverse psychology time? "You're a jerk, you're going to do whatever you want anyway."

"Glad you approve. But I'm not going to fuck my own mom. Jesus, Susan, what do you think I am?" He rolled his eyes. "She's like almost forty."

"I saw you writing something about your cock on her."

"That... that is just a little punishment. I'm making her fantasize about it. But I'm not going to give it to her. It'll be hilarious." He did seem to find it extremely funny, and motioned over to Dad's snoring form. "Want me to do the same to Dad? Make him think about fucking you all the time?"

"No!" she said out loud, immediately, but a part of her whispered, "Yes!" The conflict forced a blush up her cheeks as she tried to sort out how she really felt. She didn't want to fuck her dad... okay, she DID, a little, but that was mostly the super-horniness talking, she decided. She wanted to fuck practically anyone right now. But with her dad, even before the marker came into their lives, it seemed like he'd been paying less and less attention to her the last couple years and now after what he heard upstairs, he seemed like he was deliberately avoiding her. She might prefer that Daddy just wanted to stick his cock in her and use her like a fuck toy if only it meant that he still wanted to be with her. And, she had to admit, another source to feed her cum addiction would be awfully handy. That was just being practical.

"You sure? Could be awful fun to tease him. I could make sure he couldn't actually do anything."

Well, that just took ALL the fun out of it. "No," she said again. "I don't want to tease him."

"He might already want to fuck you, you know. I mean, I did. You're probably torturing him without realizing it, in your skimpy clothes and with your fuckable lips. He's probably lying there right now dreaming of what he can't have."

Susan had had enough of this line of conversation, it was giving her confusing feelings. "Yeah, well, you can have me, so... are you almost done writing? I still need you to fuck me and let me cum otherwise I'm never going to get back to sleep."

He bobbed his head, mulling it over, but a playful smile stayed on his face. "Okay, I guess they're sleeping deeply enough that I can take care of you."

"Good." Susan turned towards the door... only to feel a strong hand on her wrist yanking her roughly backwards.

"Why wait? Let's just take care of it right here."

***
Chapter Nine:

Susan didn't resist the pull, but she didn't get on board, since her brother seemed to be directing her towards the bed that her parents were currently sleeping in. "We can't," she warned him. "I don't care how deep they're sleeping, they'd wake up if someone was having sex in the same bed!" They'd even been talking in whispers throughout the conversation.

"I took care of that," Keith said. "Trust me, they'll be having sweet dreams until at least sunrise, no matter what. Hopefully about me, in Mom's case. Look." He let go of Susan's hand and went down by Mom's side, flipped her over onto her back, poked her boob with the end of the marker. She wasn't dead, that was clear, she still breathed, Dad still snored, but there was no sign that she was in the least bit bothered by the rough treatment. She didn't even stir as Keith grabbed her by the legs and pulled her, just enough that her head slipped off the pillow. "See? We can fuck right on top of them and they won't notice a thing. You can even cum as loudly as you want."

Her heart started to race as she realized... that counted as permission, didn't it? Maybe conditional permission, but he'd said she could cum, at least if they fucked right on top of them. It might be weird, but, she was super horny and there was something really exciting about doing it right under their noses... or, literally, right over their noses. "Okay, I guess."

Actually, it was Mom's nose Keith seemed especially interested in fucking over. He directed Susan into position, and away from places that seemed more natural places to put her hands and knees because they weren't right according whatever perverted idea was working its way through his brain. She wound up with one knee on the edge of the bed, another on the other side of Mom's head. Her pussy was suspended over Mom's face, but at a slight angle, and her hands were between Mom and Dad's sleeping bodies. Finally, though, she was in position for a doggy-style fuck, and was more than ready for it. She was pretty sure some of her wetness dripped out right on Mom's face when Keith's thumb worked its way inside her now self-lubricating asshole, sawing in and out, preparing her for more. "You going to do me there?"

"Might as well finish what I started, right?" Susan nodded. She had the permission she needed, and as a fuck toy she'd cum when he did, so right now, however he wanted to do it was great, especially if it made him cum faster.

The thumb retreated, and she felt him close in on her and his dick slide around and finally press in towards the wet and still-not-completely closed hole his thumb had left. He pushed forward with a grunt, and she responded with one, but there wasn't any pain, just the sensation of being full and complete once more. Yet of course that wasn't enough on its own, and for a second she was afraid that he would just leave it inside her again to torture her like he seemed to enjoy torturing Mom... but finally, he pulled out again, and pushed back in, and she rocked back into him.

She wasn't loud, but she wasn't quiet. He'd said she could be as loud as she wanted, and apparently, that was a state in-between, of grunts and soft moans but not screams. It wasn't about trying to keep quiet for her parents, at least not consciously. In fact, she soon mostly forgot they were there at all, so consumed with her own pleasure, the sensations he caused both inside and outside of her. There was the usual sensation of being conquered, of yielding inside and being completed... and also the milder but still exciting sensation, the squeeze of one hand on her butt or waist, the feel of the other sliding up her back almost lovingly. Underlying all of that, best of all, welling up inside her was the feeling, the approaching orgasm that was long-delayed. Not quite there yet, but close. She might not even need to wait for her brother to cum. If she beat him to the punch, she could have two... and two was always better than one.

To that end, she lifted one hand from the bed and began to rubbing the soft wet lips of her pussy, stoking that fire, a task which might have been easier if she didn't feel like she was in danger of falling over because her position, which didn't distribute her weight completely evenly, was now even more precarious. Every thrust felt like she might topple if she didn't shift her body in just the right away, and that meant she couldn't just lose herself completely in the sensation. But she was approaching that moment of perfection by inches, and now her breaths were becoming sharper, not quite screams but loud enough that they should have woken anybody as close as her parents were. The feeling had started inside of her, the one where she felt like she was on the edge of the cliff...

Suddenly, she was pushed over. Physically, that is. Keith's hand on her back suddenly became a shove, and her arm gave out at the unexpected force. She toppled forward, unable to correct herself in time, and her face planted towards the bed, but in practice right at her sleeping father's crotch.
It wasn't a soft place to land... in fact, to her surprise, and a curious mix of horror and excitement, there was a very familiar type of hardness there beneath her father's boxers, that made her think either he must be awake, or maybe Keith was right and he was dreaming, maybe even about her. She struggled to push herself up and off of him, at the very least to check if his eyes were open, but Keith whispered, "Face down, ass up," and her fuck toy mind interpreted that as an order, so she stopped trying, let her brother continue to fuck her ass while overly conscious of her father's hard dick up against her face, with a thin layer of fabric between them, and the sweaty yet not entirely unpleasant smell that filled her nose and mouth. She tried to shift her position slight while still obeying Keith's order, at least get her face off of it, but finally gave up and surrendered to the dirtiness, knowing that could close the gap between where her soul was and where it wanted to be.

Susan's hand, the one between her legs, kicked into frenzied motion as she came over that final barrier and finally had the mind-shattering orgasm she'd been craving for what felt like forever. It didn't seem to matter whether her father's dick was in her face when it happened.

Keith wasn't done yet, and continued pounding into her all through the orgasm, the force sliding her face back and forth along her father's hardness, and the friction making it press more against her. She decided to try again to shift her position to the side when she felt another sudden wave of pleasure out of nowhere, as her brother started shooting his cum inside her ass. This one, without even the warning of him clutching hard against her butt, caused her to let out an undulating moan muffled by her father's underwear.

He pulled out more quickly than usual, enough that, while she was still riding the wave, she felt another splash of cum, not going deep inside her but landing between her butthole and her pussy and dripping. Another followed, much less powerful, only felt at all because he was rubbing the head of his cock on her ass flesh.

Susan caught her breath once more and then again attempted to push herself up. Now that she wasn't being fucked, the fuck toy orders didn't seem to apply, and she could push her face clear... only realizing then that her knees had slid way farther back and her own slit bumped into something soft and yet with a hard core... it only took a second to realize it was her mother's nose.

An involuntary shudder shook her body and she made a noise something like a soft "eww." That thought was definitely more disturbing to her than her proximity to her daddy's hard dick, or even the worry that he might have been awake and only pretending. Her body repositioned in jerky confused motions, trying to quickly right herself without touching either of her parents.

This wasn't helped by the force of her brother's hand on the small of her back, seemingly trying to keep her over her mom's face. "There's no rush," he said. "They'll be out for hours."

The goo sliding out of her butt seemed to disagree, if she didn't move then it would... oh. Of course, that was what he wanted. Jerk. "You could have just done it on her face if that's what you wanted."

"Come on, Susan. I'm not going to cum on my own mom's face!" It sounded serious, but Susan knew him well enough that it was only fake-serious. Then again, she was lying too, she would have been more disappointed if he hadn't gone off inside her. "Totally different thing if it comes from you."

She didn't want to drip cum on her own mom's face either... though her butt didn't seem to be on the same page as the other end of her, as she kept feeling her bowels flex involuntarily as though trying to push as much of the cum out as fast as possible. This was probably instinct, as she had always done that to get cum to feed her addiction.

Which she'd still have to feed, she knew, only now she'd have to get it from her mother's face, or at least whatever she didn't get from her hands. So, she started using one, not quite disobeying her brother for she stayed in position, still dripping, but succumbing to her addictive behavior and scooping up big globs for her to slurp down before they landed. Before long, she started to feel like whatever would fall already had, the rest might slide slowly down her legs, but there was no need to rush, the crisis had passed.

Still gathering the dregs with her fingers and licking them clean, she started to shuffle her position so she could first sit up without doing so on her mother's face, and then slide off the side of the bed safely. Keith didn't tell her not to, but when her feet hit the floor, he said, "You missed some..."

She knew she had, but as long as she didn't see it, it was only in the back of her mind and she felt like she could maybe ignore it. But her jerky brother pointed it out to her, took her by the shoulders and turned her towards her sleeping mother's face with a few translucent globs on it, and her cum-addicted mind turned it into a compulsion, reminding her that she didn't know where she might get her next fix so she should take whatever she got, where ever she could. And as her brother's hands slid down to the sides of her arms, gently but firmly resisting her attempts to raise them in her usual way, she knew what he was expecting, and didn't resist, just leaned forward and licked her mother's face where the cum dripped, blood rushing to her face even though there didn't seem to be anything dirty about licking her mother, at least not on her face, even if cum was involved... if anything it was cleaning her up. And yet, it felt dirty somehow, maybe because the only other person she could remember licking was Keith. And with him, it was almost always dirty.

"That's a good girl," he said, after her tongue dragged along Mom's face a few times, getting what she craved so much, but the words made her feel almost good as the cum, an absurdly warm glow inside her. Even if was the kind of thing you'd say to a dog, even if it was only praise for doing something dirty, it was still praise from her big brother. And he was stingy with that even when he wasn't a jerk.

Keith sent Susan back to his room, to his bed, to wait for him while he made a few last 'improvements' to their parents with the magic marker. He wouldn't tell her what they were, and her stomach fluttered with anxiety over the possibilities, how their family life might change, maybe even forever as long as he had the marker. And yet... her super-horniness wasn't making her uncomfortable, her cum addiction had just been fed, and she was tired. Not just the normal tiredness from a long day, but either, she'd discovered since the marker came into her lives that a really good fuck made her sleepy, so, even though she was worried and trying to wait up, she found herself drifting off.

She woke to find her brother already beside her, and snuggled up against him, then fell asleep again feeling warm and safe and loved and only a little bit super-horny. Keith was still asleep when she woke next, too, after dawn, to light filling the room and a craving deep inside her. She thought about poking him in his pecs until he woke up, but the last thing she wanted was for him to wake up cranky. Maybe there was a way to get what she wanted without waking him... or if he had to be woken, at least doing it in a way that he'd be happy with.

The bedcovers only came up to the bottom of their legs before skewing off to the side, and that meant she could see his boxers and the bulge inside. Seeing that, while knowing Keith was asleep, made her feel better about the previous night... it didn't make sense, but it seemed like guys got hard in their sleep. Dad must be the same way.

She sat up, lifted his boxers by the waistband and pulled them down. There it was, itself looking almost asleep, despite the swollen hardness, it didn't jerk or move like excited, or even spring up, but then she was jarringly reminded that she was a cock-sucker. It was written on her skin, written on her soul, and when she saw a cock in front of her that wasn't otherwise being used, she had to.

The truth was, she'd planned to do that anyway, but it was still surprising how firm the compulsion was. No hesitating, just leaned in, opened her mouth, and started sucking her brother's cock like a porn star with no gag reflex. The dick responded quickly too, growing even bigger than it was and now seeming like it would stand upright without the help of her hand.

Succumbing to her cocksucker nature certainly wasn't a problem, although without her brother to guide her the 'sucking' part of it seemed a more consistent feature, without pausing for licks or any other motion, which meant she could only pause to take a breath when she absolutely had to. That got to be stressful, over time, making her regularly light-headed and not because she was close to an orgasm.

Even more stressful was the realization that she couldn't stop on her own, not even when she heard one of her parents walking down the adjoining hall. If the door got opened, there would be no hiding it, she didn't think she'd even pull off while her mom or dad watched, until they physically pulled her away, which they probably would. And Mom did have a habit of coming in without knocking.

Every sound she heard from outside made Susan think that was what was going to happen, that she'd be caught, and this time there'd be no hiding it, her parents not being able to pretend that sex wasn't going on. Maybe they still wouldn't care, but she wasn't sure she wanted that either.

Still she kept on sucking regardless of the risk, the only thing she could do was pull the covers over her head and her brother's waist. That might buy themselves a few seconds that Keith might use to pull her away and come up with some stupid excuse that they would totally believe for why it looked like, underneath the covers, her head was bobbing up and down on his crotch. Maybe he could do that regardless, even if they were caught out in her open, he might just say something like how she had an itchy throat and his dick was the only thing that could reach far enough to scratch it. Maybe if Dad was the one that caught them he'd just offer to try with his.

Her eyes winced shut while her tired tongue tried to shift position. Why'd she think about that? She was sucking her brother's cock, and he'd made her want it, but he hadn't written anything about wanting Dad, too. Even if she was a super-horny fuck toy cocksucker with a cum-addiction, shouldn't one cock be enough for her? If she kept thinking about others, did that mean she was turning into a slut all on her own? And if the marker wasn't responsible, there was no hope of the mark wiping away, either, it might well be permanent.

A hand fell on her head, and for a moment she thought she'd missed the door opening, but then realized it was only Keith, starting to stir as her diligent cock-sucking was starting to pay off. Only a second later it jerked, and filled her mouth with his delicious rich cum. She swallowed only to get another, and another.

By the time her brother said, "Now that's a nice way to wake up," there was nothing left but dribbles from a much smaller dick, which allowed her tongue to focus directly on the source of them. But even when those were gone, she couldn't let go, at least until about a minute later when Keith shoved her away. "Okay, that's enough, you're going to start wearing the skin off..."

She disentangled herself from the covers and finally was able to take a deep breath that entirely filled her lungs and exhale, but she smiled at her brother when she did, mainly because he was smiling in a cute sleepy way that didn't make him look like a jerk at all, just a brother she now woke up with blowjobs. And not just that. "Good morning," she said. "Want to fuck quick before we have to go for breakfast?"

He groaned a little. "Jesus, Susan, I may have a low refractory period but even I have my limits."

She opened her mouth, about to suggest that he could write "always able to have sex," or "never runs out of cum" or something else on himself, but remembered she really didn't want to fuck now... or at least, she didn't want to do it while they'd be overheard and potentially caught. Her super-horniness was up to a level where she really did want to fuck, and that's what made her suggest it, but it wasn't so bad that she couldn't think better of actually doing it. "Okay. How about I go to my room and get dressed then?"

"Sure." She crawled over his body to the side of the bed, then left him alone, wondering as she did if he was less of a jerk in the mornings, like some people were more of a jerk when they just woke up. He did seem a little nicer when they woke up yesterday, but those were unusual circumstances, with Mom bursting in on them. With that thought on her mind, she didn't listen at the door like she'd wanted to, to make sure the hallway was clear, and when she opened it, her mother was in the hall.

***
Chapter Ten:

This time, there was no dramatic confrontation. Of course, this time, it was less surprising... Susan had asked for permission to sleep in her brother's room, and she seemed to be clothed. She and her mom merely stared at each other for a few seconds, almost sizing each other up. For her part, Susan was trying to figure out if the spot that she'd licked cum off her mother's face the night before looked a little red or if it was her imagination, and then wondered if her mother was likewise inspecting her for subtle signs of something not quite right. Susan didn't think there would be, after all, the last batch of Keith's cum went directly down her throat, so there shouldn't be anything on her face. There might be cum spots from earlier on the nightshirt she wore, but she didn't think it would be that obvious if she acted completely normally. "Morning," she said, a blush automatically forming on her face that probably wasn't normal, nor was the way she averted her gaze towards the floor and walked back to her room without another word. But she couldn't help it, a part of her still thought Mom saw everything bad she ever did and just sometimes chose not to punish her.

Maybe that was the case this time, too, because she just said, "Morning, Susan. We'll be having breakfast soon, so be sure to get dressed." She didn't sound at all angry, at least, although she seemed especially emphatic about the 'getting dressed' part.

A new set of clothes made her feel more normal. She chose shorts today, technically pink in color but the colors were faded enough that they could be confused for white, and a red tank-top with blue trim. Some of the marks showed through, on her thigh, and if she bent over you could see she was a fuck toy. It didn't matter if they stayed at home, but it might be a problem if there were any family plans this weekend... she'd have to change again.

Breakfast was eggs and toast, prepared not by Keith but by Mom. It was simple but good, except when Dad complained about how there was no bacon, and Mom seemed to blame Susan. Not outright, in words, but when she explained that they were all out she glared in Susan's direction in a way that made her blush guiltily, even though it was entirely Keith's fault. He ate the last of it for lunch and she didn't get any.

"No big deal, though, I'll pick up more when we do the grocery shopping."

"I'll come along," Keith said, entering the kitchen, belatedly, and still wearing only his boxers. Susan noticed her Mom's eyes look him up and down, and then suddenly away into her plate. "I've got some ideas, but I don't trust you with a list." He took the plate that was waiting for him on the counter and joined the table.

"Then you'd better get dressed fast, unless you plan on walking around the grocery store in your underwear," Mom said, still not looking at him. Now her face did look a little red. "We're leaving right after we eat." She looked at Susan, said, "What about you, are you coming too?"

Susan looked down at herself, imagined herself in public, people at the grocery store reading "fuck toy" on her chest when she bent down to get something from a low shelf. Maybe this was a wrong choice of outfit after all. "I'd have to change."

"Forget it then," her mom said. "I can wait for your brother to get dressed, but I'm not waiting around while you spend hours deciding on what you want to wear." That was totally unfair, she didn't spend hours. "You can stay home with your dad."

Dad cleared his throat, looked up like he was just now paying attention. "I'm sorry, what? I'm staying home?"

"Well, if Keith's coming along you don't really need to, do you? And someone should stay home with Susan, just in case." Susan hated that. She was twelve, not a baby, it's not like she needed supervision. If you're old enough to start having sex you should be old enough to stay home alone. "And you're always complaining you never have time to yourself anyway."

"I guess." Dad didn't seem too enthused by the idea. "I do have some work to catch up on."

"Then it's settled. You two stay home, and Keith and I will have a mother-son shopping day."

Susan didn't like the way mom looked at Keith when she said that. The look itself wasn't that bad, she was smiling, which was sort of unusual in itself, since she usually looked mildly frustrated or exasperated with her oldest son. But Susan also knew that Keith made Mom fantasize about him, and so saw more in that smile than a mother wanting to spend time with her son. When they were alone in a car, who knew what might happen? Maybe that was why Dad and Susan had been told to stay home, that Mom was going to try to have sex with Keith, and even though he said he didn't want that, Susan still fumed at the thought. He was a jerk, and jerks could lie about anything they wanted. She didn't want them to do anything together, and yet she didn't think she could stop it if that's what he wanted.

The best she could do was try to talk to Keith before they left. So when he went upstairs to put some clothes on, she slipped up too. She found him with his jeans but still topless, and he looked good. Better than usual. Was it her super-horniness or did he write something new on himself? "Wanna have sex before you go?" She pulled down her shorts with her thumb, with the idea of reminding him what he already had access to any time he wanted. He didn't need Mom, too.

He looked back at her with a smile as he slipped a shirt on. "I don't think we really have time to. Maybe when I get back."

She opened her mouth, then closed it again, not sure how to beg him not to fuck Mom without seeming jealous, or worse, giving him the idea that it would be another fun thing to torment her with. He might do just that, even if he didn't want to fuck her... do it, or pretend that he did, just to mess with her. Susan wished she could get a hold of the marker and... hope sprung in her for a moment as she formed the thought, and then it was crushed almost as quickly. For just a second, it looked as though he was ready to leave, without it, but then he turned back to the lockbox and opened it, his back to her to carefully hide the combination. Of course he was taking it with him. She wouldn't be that lucky, that he might leave it at home and let her try to find some way to open it while he was gone. And when he was gone, he'd do whatever he wanted... all she could hope was that he was being honest when he said he didn't want to have sex with Mom. That made it almost not worth worrying about.

Letting out a defeated breath, she moved onto her next concern. "You might be gone a while," she said. She knew how Mom's shopping trips with Dad could be, often they didn't go to just one place but stopped off at multiple stores because Mom kept remembering one more thing she needed to do. "Can you give me permission to cum, at least, when I get super-horny?"

Keith made a show of thinking about it as he slipped the marker into his jeans pocket and put the box back. Susan by now knew his habits... that was a no, unless she'd done something that particularly made him happy, and aside from waking him up with a blowjob (which, she thought, should absolutely count and yet somehow didn't) she couldn't think of anything. Now that she thought about it, maybe she shouldn't have sucked him off at all, she should have gotten him to have sex with her first thing in the morning and had a fuck toy orgasm that would have lasted her until he got back. Because of that mistake, she was going to be suffering for the next few hours, at least if she was right about her brother's answer. Which she was. "No, I don't think so. I'd rather have you super-horny and waiting for me when I get back." She slumped, and he tousled her hair as he moved past her to the hallway. "Tell you what, if it gets to be too much, you can always ask Dad for permission."

She followed him out and down the stairs, scowling at the thought. I'll never get that desperate, she told herself. Mom waited for him by the door, fidgeting one-handedly with the keys, then smiling again when Keith showed up, then gave one last glance to her husband, on the couch, and daughter at the foot of the stairs. "Okay, we won't be gone long, you two, so... try and get up to something productive."

"Hey, Mom, you think I can drive?" Keith asked.

Before, the answer would be "no." Keith's driving made Mom too anxious. Now, though, she said, "Sure, I don't see why not," and tossed him the keys.

The moment the others were out the door, Susan and her dad looked at each other. Then looked away, Dad breaking contact first. He stood up and mumbled, "Well, I have some things to do upstairs."

Susan gave him his space, spent time in the living room, trying to tell herself she enjoyed the quiet alone time, without Keith in the house. Her dad might be uncomfortable around her now, but at least he didn't see her as just a fuck toy, so it was almost like she could be her old self.

Or so she tried to tell herself, but the feelings didn't go away just because no one was there to take advantage of it. Nor did reminding herself that there was no way to take care of her super-horniness make it go away... she might only be a little way down that path, but she couldn't stop herself from travelling down it.

Thinking about it certainly didn't help the problem, because thinking about it lead to thinking of all the stuff she wanted to do to solve it, which led to more horniness. Watching TV sounded like a much better solution. She could lay down on the couch and with some educational Saturday morning television on at least be distracted. There was a show full of cute dogs with stories from owners and dog care tips and she only occasionally thought back to when she played dog for her brother, and his threats to make her have sex with a real dog, and wondering why these shows never showed what dogs dicks were really like. Isn't that far more important than that you should never feed your dog chocolate, which didn't everyone already know anyway?

Susan gradually began to realize that TV wasn't distracting her as much as she had first thought. Or it was, but in the wrong way. When your mind was mostly occupied watching the television, it was easy to absentmindedly do something that felt good, because, hey, why not feel good? So she barely noticed that her hand slipped into her shorts to start rubbing herself, then fingering herself, it just felt good and helped pass the time. The same thing happened when she was eating junk food, if she wasn't careful and she did it while watching TV, she might go through a whole bag of chips without realizing it.

Of course, when her father caught her pigging out on chips, it wasn't nearly as embarrassing.

She wasn't 100% sure he saw anything. But then, she didn't notice he was downstairs at all until he coughed, at which time she quickly slipped her hand out of her shorts and pretended nothing was happening, and her father walked past looking for some papers and not looking in her direction at all. But his face was more pink than usual and he seemed to walk funny like he was keeping his front aimed away from her.

Even though she didn't see one, she imagined him with a boner he was trying to hide as he went about his business. The thought made her own face flush and she buried it in a couch cushion as hard as possible so he wouldn't see, but her pussy clenched at it, wondering if her brother really did go back and write that Dad fantasized about her, if he was doing it right now when she looked at her, and what exactly he was thinking. She was also mortified at what he'd saw, or might have seen, but that was on a separate, quieter layer of the emotions running through her. Horny came at the top, then excited, then embarrassed, and below that flattered and ashamed were somewhere. Ashamed was not quite the same as embarrassed, she was finding out. For example, when she thought about going back to masturbating openly while he watched, pulling down her shorts so he could actually see her playing with herself, she was ashamed at the thought, but the embarrassment only came when she imagined him reacting badly, freaking out... if he watched patiently and excitedly, she didn't think she'd be embarrassed but still ashamed. On the other hand, when she thought about everyone at school learning she was her brother's fuck toy, she was super embarrassed but somehow not ashamed.
Soon she found herself wishing that her father would either find the paper he was looking for and leave so she could go back to masturbating in peace, or try to act on those maybe-fantasies so she could ask his permission to cum.

That was another thought she was a little ashamed of, after the wish came true. The first part of the wish, the innocent part, but still, soon he was running back up the stairs, and that was a relief. He hadn't said a word to her, not even a hello in passing, or asking if she'd seen whatever it was he was looking for. This made her more and more convinced that he had seen her rubbing her pussy while watching a show about dogs and was simply embarrassed.

The real question was, was he ashamed?

***
Chapter Eleven:

Susan didn't go back to masturbating right away, though, despite that was why she wished her daddy would leave. She did those thigh-clenches and got some of the same kind of pleasure that way, but those seemed to be automatic, like her body reminding that she was super-horny, and that she needed to cum. But she knew if she gave in and masturbated it would just get worse and worse and pretty sure she'd do something she'd regret. Whether or not she was embarrassed or ashamed, she knew she couldn't give into certain urges, there was only so much change her life could take. She might sometimes like how her relationship with her brother had changed, but she didn't want to give up her whole life... there was no going back with some things.

It was like the word on the marker, 'indelible,' which wasn't really true with the marker, because the marks did fade with time, and maybe you could find special chemicals that would erase them. But 'indelible' also meant 'unable to be forgotten or removed,' and that was the real danger of the marker, these indelible changes to the way people saw her. Already her parents were looking at her differently, and Daddy could never see her in the same way if she tried to have sex with him. Whether or not it worked. Even once the marks faded away, that change would be indelible.

She just wished her brother would get home soon... that relationship couldn't change much more than it had already, and if he just made her cum she wouldn't even be considering throwing the rest of her normal life away.

But he wasn't there, and she was considering it. Considering knocking on her father's door completely naked and, when he answered, telling him she was super-horny.

Of course, he'd probably just say something stupid, like, "Hi, Super-Horny, I'm Dad."

The absurd thought provoked a snort of genuine amusement... even as unfunny as the joke was, the situation somehow was. It helped a little, remembering the relationship as it should be. And there wasn't much that was as unsexy as a dad joke.

She tried to keep more of those in her mind as she shut off the TV and went upstairs. Not to bother her father, but to hide in her own room, try and do something that took more of her brain than TV and didn't let her mind wander. Writing would normally be her first choice, but she figured anything she wrote would turn sexual... and considered it anyway, some traitorous part of her brain telling her that if she wrote out what she was imagining with her father as a story she wouldn't need to do it. But she knew that might only work if she could cum while writing it.

So instead she read social media, checked some of her favorite sites, did some research for a fan fiction story she'd thought about writing before this all started. She didn't think she was going to write it, not while the marker was her life, maybe not ever, but doing the research and making notes still kept her mind off things, for a while, and since it wasn't actually writing it didn't turn dirty and start to make her touch herself and make the problem worse.

It helped, but she kept having little slips as her mind wandered into dark territories, and as an hour stretched into two it began helping less and less and her need grew more and more, and with no idea how long her brother would be gone, she started thinking again of doing the unthinkable. She changed her clothes just because it seemed her shorts were soaked and visibly so, like she'd wet her pants, and while she was naked, she wondered if it'd be better to just stay that way. Maybe forever.

Instead, she changed into a skirt, left underwear off, made a deal with herself, put it in fate's hands. She'd go downstairs, watch TV and pretend to sleep... or maybe not, but lie there at least, with her butt up and legs over one of the sides of the couch. With that skirt, people could see her panties like that, if she wore them. If Daddy came downstairs, he'd see her hungry wet pussy right away, and if he chose to do something about it, she wouldn't say no, she was way too horny to say no. If her mom and Keith came home first, then she'd just get up before they got in the hall and pretend nothing happened.

Of course she knew fate was the one who put a literally magic marker in her life and a brother who used it to make her into a fuck toy, so fate might be planning for her to just be that forever. But if that was the case, you can't fight destiny, right? And if it wasn't fate, just bad luck and bad choices, then maybe she deserved to be punished for them a little more. Even if it meant making another bad choice.

It really was a bad choice, although she only realized how bad later when she wasn't so horny... she didn't even think of what might happen if her dad did something and then Mom and Keith walked in on them in the act. Mom would be mad, maybe mad enough to call the police. Keith probably would be mad too, though his anger seemed safer. Either way, it was a very bad choice, one she only made because she was so horny.

But this time, her bad choice didn't come with bad luck, though it was a very close thing. She heard her dad moving upstairs, like he might just come down and see what was waiting for him, and Susan had just decided to thrust one hand underneath her, masturbating, to give him something even better to walk in on, something that she couldn't pretend she was doing innocently... but a second later, before Daddy reached the stairs, she heard keys at the front door.

Susan snapped upright, spun, and then sat down on the couch, pulling her skirt down so that no one would see the lack of underwear beneath it from any angle except perhaps at around her feet. By the time her mother came rushing in, she was the perfect picture of innocence.

Not that she would have noticed, Mom was practically in a panic, sprinting for the bathroom with a single dark plastic bag under her arm. Keith came in casually a few seconds later, holding one more traditional reusable bag full of groceries which was the least he could do. Almost literally, because on family shopping days they always bought at least six or seven of those bags worth of stuff but he just carried in one, put it on the living room table and seemed completely uninterested in going back for more. Jerk. Instead, he smiled at Susan. "Have fun?"

"You could have called and said you'd be so late." She was still horny, but now that Keith was here, it was easier to control. It was the uncertainty that made it so bad before, not knowing how long Mom and Keith might be gone or if they might be having sex... she looked back towards the bathroom at the thought, then at her brother, trying to find any subtle signs. There didn't seem to be any, but she wasn't sure what they might be. Maybe she could suck his dick and see if it tasted strange. Or she could just ask. "Did you and Mom...?"

From the grocery bag, Keith retrieved a smaller bag, a bag of Doritos, which was already open, but now he took another single chip. It was one of those smaller bags, the kind that is good for one person or maybe two, the kind Mom never bought because she felt they weren't worth the money, and they were likely to spoil dinner. Susan wondered if he just talked her into it, or if it was a reward for something, like giving Mom a great orgasm. As he munched the chip, he looked at her with an expression on his face, like he was expecting her to finish the question... as though he had no idea what was in her head. When she didn't take the bait, he finally said, "We stopped at the mall." That wasn't an answer to the question she was looking for, but it'd do until she could taste his dick. "Would have been here sooner, otherwise." It was probably the closest she was going to get to an apology, so she smiled, at least until he put his feet up on the coffee table and brought up a whole new cause for suspicion. "But check it out, she bought me new shoes." They looked good, sleek black running shoes, name brand, more expensive than the kinds Mom usually bought them, but not ridiculously priced. It was the same question as with the Doritos again. Was that a "I feel guilty for what I'm feeling" gift, or a "I feel guilty for having sex with my own son in the mall parking lot" gift? Or maybe it's just a "he says he needs it and I have complete faith in him" gift. Maybe she was just being paranoid.

Not just being paranoid, paranoid and super-horny. "Wanna go upstairs?" she whispered, hoping that he would reveal that nothing happened with Mom by his own horniness.

"In a bit. Once the groceries get in I need to do some prep for dinner, I'm doing a roast. Should be good. Never realized how much I enjoyed cooking."
At that moment, Mom came out of the bathroom. "Felt like I wasn't going to make it there. Those mall washrooms are disgusting, I didn't even want to sit down in there." She walked over to the staircase landing and called up, "Honey, come help get the groceries out of the car."

Dad came down, gave those assembled a look, then went outside. Mom also seemed to look at Susan for a few seconds, then returned to the bathroom and came back a moment later with the black bag. "Susan, I'd like to talk to you upstairs in your room."

Her heart started to race. A talk upstairs? That was never good. Did Keith say something about her? Her brother didn't seem like he was concerned, or smug, either of which might be the case if it was something he set up. He was just watching the TV, uninterested. "Uhm, okay," Susan said, and started up the stairs, her mother close behind.

They didn't speak on the way to her room. They didn't speak immediately when she entered, either, which made Susan feel even worse as her mother directed her to sit on her bed. Mom didn't look like she wanted to do this, whatever it was, any more than Susan, looking all around the room and then took a deep breath and finally launched. "Okay, I know that you're becoming a young woman, now..." Oh, god, Susan thought. "And you know it's all perfectly natural to be exploring certain feelings that might be new to you, things that you know, pop into your mind and feel good, and you know, it's totally normal for a girl your age."

"Mom, stop." If there was any comfort in this it was that her mother seemed as uncomfortable as she did. It wasn't much.

"I'm not judging at all, it's totally natural to have these feelings and to want to explore your body in this way, your hormones are out of control..." At first Susan thought her Mom was complaining about her 'whore moans' especially when she continued with, "It's just you do have to realize that this house isn't very big."

"Mom, please..."

"We're not trying to interfere, but you need to learn to practice boundaries and also a little self-control, just so, you know, so you don't disturb anybody. Now, I got you something." She reached into the mysterious black bag and pulled out a hard-plastic shrink-wrapped item as Susan looked up in curiosity. At first, the cardboard backing was faced the other way, so she couldn't figure out what it was, but her mother awkwardly thrust it in her hands and then seemed to take a lot of interest looking out the window. It was a finger-sized cylinder, pointed at one end, described as a "mini personal massager." It looked very much like the toy Keith found in the box with Mom's leashes, only smaller. She was still mortified, but at least it didn't say "My First Vibrator!" or something like that. Mom also handed her a pack of batteries that were exactly the right type listed as being required but not included. "Now, I don't want you rooting around in my stuff or using an electric toothbrush or anything like that," her Mom continued. "This is yours. Keep it somewhere discreet, and wash it after you use it, every single time, okay? If you need replacement batteries, come to me, not your father, okay?" Mom didn't look to see if Susan nodded at either question, at this point they were avoiding eye contact as much as possible.

She didn't nod, tried to think if she should say thank you. Right now she wanted to just pretend this conversation wasn't happening. Though she did want to keep the vibrator.

"And one more thing," her mother said, and reached into the bag again and pulled out... something weird, and not wrapped in any packaging, merely a tag on a string at one end. It was some sort of rounded bar, and looked a little like the very end of a bike handle, that rubber bit you hold onto, but it had holes all the way through it, like one of those wiffle balls. Susan had no idea what it could possibly be used for. Sure, you could probably push it up inside you, but you could do that with so many things. "If you feel you can't help being loud, put this in your mouth and bite down." She mimed the action, holding the gag, for that's what it was, just outside of her mouth. "You can breathe through it, but we won't be able to hear you so easily." At least now she knew completely for sure that they'd heard her. That also wasn't much comfort at all. "This way you can do whatever you need to do without worrying about your brother or father overhearing. They don't need that in their head." And now she knew for sure that they thought she was alone the previous night after dinner, that they didn't know her yelling out was from her brother fucking her. Otherwise Mom certainly would have said something about that, right? That did make her feel a little better, finally. Even if this conversation was horribly painful, it could have been a lot worse. Okay, her parents probably thought of her as a super-horny preteen who couldn't stop from touching herself... which she was, too, but that perception, as indelible as it was, would be easier to live with once she finally found her way out of the marker business. If they found out Keith and her actually had sex, that was something else.

She just had to convince her brother to stop flaunting it.

After nearly a minute of silence between her and her mother, with neither of them knowing exactly what to say, Mom finally moved towards the door. "I'll leave you alone now." One step out the door and she came back in. "Oh, and if you're going to be sleeping in your brother's bed again... make sure everything's out of your system in here first, okay? You'll, um, sleep better." She left again, and this time she didn't return.

Her next visitor was Keith, a few minutes later. He had something behind his back. "What was that all about?"

There were no points in any secrets, so she held up the still shrink-wrapped mini-vibrator The gag she left on the bed beside her. Her brother sat down beside her, still keeping whatever he was holding out of sight. "So that's what she was doing when she sent me to go find a pair of shoes I liked. I just thought she was getting, you know, women's stuff." He grinned at her, tousled her hair. "Looks like I wasn't the only one to get something nice out of this trip, huh? Actually, you got two gifts."

She thought he meant the gag, but he didn't seem to have noticed that at all, and it sat unnoticed between them. He might have meant the batteries, but she wasn't sure, and there was still the thing he was hiding. That could have been a gift, but she didn't want to presume. So she said, "Huh?" He did in fact lift the thing he brought into the room, a long, thick, green vegetable. "You got me a cucumber?"

***
Chapter Twelve:

Susan stared at the vegetable as her brother explained. "Well, I figured you might be suffering by now, and since I might be busy for a while with dinner, I'd have mercy and let you make yourself cum... but only while this is deep in your pussy." It certainly had a good shape for it, rounded at both ends, and though it was longer it was more or less the same thickness as Keith's dick when he was hard. She noticed all of that right away, and she wanted to try it out even before he'd explained what it was for, and even more once she realized that he'd given her permission. Even if it was conditional permission, that counted before. She'd prefer the real thing (or maybe something a little wider, even), but at this point, she just needed to get a way to cum, so she reached out and took the vegetable from him, then pulled up her skirt.

She spread her legs slightly, and pushed one slightly yellow-streaked head of the vegetable up against her slit, rubbed up and down to get some wetness on it, and then began practically forcing it inside her. It didn't hurt, though it looked like it probably should, her lips swollen around it and clit poking upwards and excited but as though it, too, was straining against the internal pressure.
Keith watched until it was about halfway in... not halfway down the whole cucumber, but halfway on where it would be if it was his dick, and then said, "Just remember, that's just a loaner."

That made Susan stop the insertion and look up at him quizzically. "What?"

"Yeah, I'm going to need it back when it's time to make the salad tonight." He had that grin again, that devilish look. He was going to feed the entire family a salad made with a cucumber that she'd cum all over.

The thought excited her too, but she refused to show it, grimaced instead. "Why would you do that?"

"Cause I think it'll taste good." He pulled back his sleeve where the words "Good Cook" were written. "You going to question my chef-ly instincts?"

She sighed, but decided to pick her battles. She didn't think her parents would notice what had happened to the cucumber... she doubted either of them had tasted what pussy juices taste like, so they'd probably just think it was a weird salad dressing. Which it sort of was. Susan's All-Natural Salad Dressing. A gasping laugh escaped her.

"There, that's the spirit. So I'll be back for that in a little bit. Have fun getting it all nice and juicy for me."

After her brother left and closed the door, she leaned back, one hand still on the cucumber, then spotted the hard-plastic package out of the corner of her eye and got an idea. She sat up suddenly and violently tried to tear it apart. Of course, it wouldn't work, but she gave it a few more frustrated tries, twisting it this way and that before finally deciding she needed scissors. So she rolled to the end of the bed, trying to keep the vegetable inside her by keeping her knees closed. There was no way she'd make it all the way downstairs like that, but there were some scissors somewhere by her desk for occasional crafting projects or school work, so why take it out when she could just duckwalk?

It took some searching, but she found it in a drawer, returned to the bed and cut open the plastic, just a little until it was weak enough to tear open. Next she needed the batteries, but at least that packaging was easy to open and before long they were inserted. There was a sliding switch on the toy with off and three settings... she slid it all the way to the maximum setting and it came to life, shaking eagerly.

Susan thought it might be best to turn it off again before putting it in her ass, which was where she intended it, but first while it was on she slid it up along she slide of her cucumber-devouring pussy lips and her whole body seemed to shake. Yes, this was going to be good.

A voice through the door broke her composure for a moment. "Don't forget the gag, sweetie."

Susan immediately shut the power off and her face felt on fire, then stopped moving, trying to be as silent as the grave until she heard her mother's footsteps retreating. Yes, it really was a small house and a noisy toy... maybe not loud enough to be heard everywhere in it, but if someone was right outside her room, clearly someone would.

Hopefully it'd be quieter when it was actually inside of her. Once she was sure her mother was no longer standing by her door, she rolled onto her side and then pressed the pointed end to her butthole, feeling it start to drip in anticipation, and then started pushing. She got about halfway before she realized that, if she wasn't careful, it could slide all the way in and close around it, leaving it stuck in there for who knows how long. Better to be safe and leave enough out that it wasn't in danger of that, and where she could easily access the switch.

She flicked it back to the full power position, and suddenly it was like her whole lower body was vibrating in pleasure. Letting go of the vibrator, her other hand closed on the cucumber in her pussy, sliding it in and out of her stuffed but still hungry cunt.

Her heart raced along with the incredible sensations with what felt like irregular bursts, like it was trying to decide whether to follow the slow rhythm of her thrusting the cucumber in and out or the much faster buzz of the vibrator shaking her asshole violently. It wasn't just her heart, her chest heaved sucking down air, her holds clenched and she even bit down on her lip... her entire body seemed to be a series of mostly involuntary motions surrounding a set of sensations that were overwhelming her.

Her mom's warning popped into her head again, something that should have drained all the excitement out of her, but she was too far gone for that and instead the thought that her mother, maybe her dad, knew what she was doing added more excitement, mixed with embarrassment. The gag was probably a good idea despite that. Her free hand lurched out questing around the bed, searching for the gag her mother recommended, and part of her pictured her whole family watching this display, not bothered by her writhing in sexual pleasure and concerned only that she not make enough noise to disturb the neighbors. Finally closing her hands on the rubber, she thrust it into her mouth and bit down as her other hand, the one on the cucumber, picked up speed as she reached the moment she'd been needing for hours.

Suddenly Susan felt like so much more than a squirming, clenching collection of parts feeling pleasure, she was pure pleasure itself.

It couldn't last forever, not even very long. After her brain finished exploding (figuratively, some part of it mind reminded her) she lay there, catching her breath through the holes in the gag. Her ass still buzzed with the vibrator on maximum, and she still liked it, but it seemed so much less intense now.

She could have stopped there, taken out the cucumber, sucked on it to get her own cum to feed her addiction, gone back to being a normal girl again until the marks on her body once again took over her life. Then again, she had permission to cum as long as the cucumber was inside her... who knew when she'd next get the chance?

It was a slower start this time, and she spit the gag out of her mouth first... she wasn't sure whether it did the job of making her quiet, but it wasn't pleasant anymore. In the moment, it was, there was something that really felt good about having something in every hole... but it still felt good just being stuffed in her pussy and ass, and lying there, rubbing her pussy and the long green vegetable still inside to gather whatever girlcum she could to feed her addiction.

If only one of them was a real cock... or maybe not just one, her pussy tingled with the thought of it, not just Keith fucking her pussy, but also someone else, Daddy, fucking her ass. She imagined him there, forced by a word written on her by her smirking brother, and Susan lying between them on the bed, squeezed, rocking with fuck toy orgasms as each of them came in her. It was a wicked thought, and so was the one that followed, that she wouldn't need a gag if there was someone else there, too. She didn't know who, right away, some teachers popped into her head and she auditioned them mentally, taking a few seconds to imagine their cocks in her mouth in turn. None of them felt quite right... not bad, maybe even a lot of fun, just not perfect and she wasn't sure why they'd be visiting her house to join in the fun. Maybe it'd be best to stick with just her father and brother, that way she could keep the vibrator going in her ass.

Yes, that clicked in her head, because she could pretend that was happening right now. It was even plausible that Keith might want her to do that someday soon, with the way he'd been acting, the way he seemed to want his parents to fantasize, to even actually taste her. Fucking was the logical next step... and she knew it was wrong, a step too far, a step their family couldn't come back from, but in her imagination it was okay. It was like how you weren't bad for writing a story where somebody murdered... anything was okay in the imagination, so it was okay to use this idea to cum. She rolled onto her knees, and angled herself so the cucumber pressed down against the bed, so instead of using her hands she merely needed to push against it and it would push back.

In that way, she could pretend to be riding on top of one cock while her ass buzzed pleasantly. Now if she only had another fake-cock to stand in for Daddy. Or maybe Keith... in her mind's eye, which one was in front of her and which one below jumped back and forth. She'd never really seen her Dad's dick, not hard anyway, and wondered if it was bigger, because he was taller... she didn't think it worked that way, but it might.

There wasn't anything on hand that was bigger than the cucumber... the gag was the closest thing to the right shape, if she slipped it in her mouth sideways, so that's what she did, though it felt even less like a real cock than a cucumber, her tongue kept dragging on the holes.

That just meant she had to imagine even harder, and think dirtier thoughts. Imagining fucking her dad and sucking Keith (or the other way around) became imagining doing it all in front of Mom, became Mom telling Keith to cross out the 'in' from 'infertile' so she'd get pregnant and have to return to school with a big belly and not knowing which of her family members was the father. Everyone would think she was a slut and treat her one and since she'd have to pretend she didn't know who got her pregnant, she'd probably have to pretend to be a slut and just fuck anyone who wanted her, especially if she was still a Cock Sucker and Super-Horny. They'd probably see the marks, too, those ones if Keith renewed them plus whatever else he might write. That could be anything. He'd talked about making her fuck a dog, maybe he'd write "dog-fucker" on her and anyone who wanted to see that would just have to bring their pet.

She once again tried to imagine what that was like, having sex with a dog. It couldn't be that different, and right now it wasn't even disgusting, it was almost hot... the only reason for the 'almost' was that it was too unknown, too hard to picture... but she'd both loved and hated it when her brother treated her like a dog, and a dog having sex with her would be the same thing, except she couldn't be angry at the dog so she'd probably enjoy it more.

Imagining that while riding the cucumber was getting her close to the point of another orgasm, but instead of continuing with that, she found her mind circling back to Keith and Daddy sharing her instead, only now they were being rougher, she was wearing a leash that was tugged violently whenever she wasn't fucking back hard enough. Imagining them too turned on to treat her like a daughter or sister, just using her solely a fuck toy spoke turned her on a lot more than she expected. It was weird, the thought of them not caring about her pleasure seemed to give her even more, like if her feelings didn't matter then she was free to just enjoy it instead of being so conflicted like she was every other time. She didn't have to worry about what was right, just feel good and make her family feel even better. The gag in her mouth still didn't feel much like a cock but she sloppily sucked it like her life depended on it and she felt the moment coming when the pleasure took over and rocked on her vegetable with all the energy she had left until it came, until she came, collapsing onto the bed in a pile, the drool-covered gag slipping out of her mouth.

***
Chapter Thirteen:

Eventually Susan came back to herself and shut off the vibrator as soon as she could manage to move her arms, then finally pulled the cucumber out, giving all her holes a rest. They were now starting to hurt... but it was a good hurt. Not just because now she felt so relaxed, but because it occupied her mind. So did her reflexive probing of her pussy to collect her juices on her fingers and suck on them to feed her cum addiction with her own cum.

Because once the pain faded and she'd quelled that urge, shame began to drip back into her, shame for thinking what she thought and enjoying it as much as she did, and for knowing that soon she'd be doing exactly the same thing, or worse. She couldn't change what had happened already, didn't even think she wanted to, but she knew she had to stop it from getting any worse. Or at least she had to try. Only problem was, she doubted she was strong enough or smart enough. Even as she looked at the cucumber, and realized that she could interfere with her brother's plans by eating it, she couldn't bring herself to make even that small rebellion. Then again, what did it matter if her parents ate that, as long as they didn't know. It was just a minor step. So was every step along this journey that had gone too far already, she knew, but still believed that if she could just find a line and get Keith to promise not to cross it, maybe it would be okay.

For that, he needed to not be angry at her, so she left the cucumber as it was, for Keith to collect a couple hours later. He was a jerk about that too, sniffing it after he picked it up, saying, "Woo, how long'd you keep it in there? It's practically a pickle." But when he didn't get the reaction he seemed to be wanting, he changed. "You okay?"

"Yeah," she said. "But we need to talk, okay?"

The smirk returned. "Oh, we do? What, didn't you get to cum? Do you need masturbation lessons? I could get an expert in here."

"No," Susan said, blushing despite the fact that there shouldn't be anything embarrassing about the topic of masturbation anymore. It was probably just the thought of bringing someone else in, which probably meant Mom, which was just the sort of thing they needed to discuss. "Just, please, can we talk a bit?"

"Later. We'll have plenty of time to talk tonight, but right now I've got to finish dinner." Keith patted the cucumber again for emphasis, then grinned a wicked grin and left the room. Susan sighed. The conversation could wait, as long as he didn't try to do anything during dinner.

Once dinner was officially called, Susan dragged her heels, descending the stairs slowly, worried that they'd somehow know what had happened and blame her, because of course based on all evidence she'd seen so far they wouldn't blame Keith. At the very least, Mom would know what she'd been doing upstairs, the first time she'd seen her since that awkward talk.

Now that she wasn't thinking of seducing anyone, or letting them seduce her, she'd changed her outfit, into a simple pastel blue-green t-shirt with a smiling cartoon watermelon on the front, and a pair of pastel blue pants. Everyone was already seated at this time, so she slid into her spot beside Keith, trying to ignore her mother's look, her father's eyes automatically sliding away when their gazes crossed.

On her plate was already a generous portion of some kind of white creamy pasta, one appealingly pink slice of meat, and a small quantity of salad... lettuce, tomatoes, and slices of a very familiar cucumber. They'd waited for her to start, except for Keith who already cut into his slice of meat when she sat down. Then everyone seemed to dig in at once.

Members of her family, she'd noticed before, generally ate things like salad last, except for her mother who dove in first under the theory that it would make her eat less of the more fattening things. Everyone mixed things up a little, but Susan usually was more of a mixer than anyone else, taking a bite of this, a bite of that, but watching her mother eat pieces of cucumber that once had been inside her, while Keith looked on with a grin, made her focus on the roast, with occasional bites from the pasta.

The rest of the dinner did taste delicious, she had to give Keith that, even if it was only because of the marker that he was such a good cook. The meat was cooked to the perfect level of doneness, so it was juicy and flavorful, the noodles were al dente, and the sauce complimented the meaty flavor when she swirled the roast in it.
The remainder of the roast sat on a plate beside her father, who also was the one to cut it despite having nothing to do with the cooking. When he saw that Susan had none of the meat left, he raised the plate and thrust it in her direction. "Would you like some more meat?"

"Of course she does," Keith answered for her. "She can't get enough of my meat."

"Keith," her mother said, like he'd just said something questionable, but finally just shook her head and seemingly decided it wasn't worth bringing up since he almost certainly didn't mean anything by it. "Never mind."

Her father dropped another slice of the roast on her plate, then returned to his own meal. "How's the salad?" Keith asked, directing the question directly at Susan.

She glared at her brother, but dug her fork into a clump of greenery and put it in her mouth. There was a cucumber there, but to her surprise, she didn't taste anything unusual. There was some kind of vinaigrette dressing on it that drowned out any of her personal flavors. "It's fine. It tastes like salad." Pretty good salad, but she wouldn't admit that.

"How about you, Dad? I think you'd like the dressing." Susan's face burned and she wanted to bury it in one hand, especially as her father finally sampled the salad, a forkful which included at least three slices of cucumber in a row.

After chewing and swallowing, "Yeah, I'm not normally much of a salad person, but I like it. Not as much as the meat, mind you, but, it's pretty good. Hard to believe my son's suddenly turned into a master chef."

"Something fishy to me," Mom said, and this time Susan did smack her face with her hand and held it there to try and hide her blush, and partly to keep from letting out an embarrassed "Oh god."

"Oh?" was all Keith said.

She finished her bite, then pointed her fork at Keith. "I think you've been spending all this free time this summer watching those cooking channels."

"Maybe I'm just supernaturally talented," Keith said, which seemed to be the truth. "So, how about you, Mom, aren't you going to try some of my meat?"

This time, Mom coughed through the bite of pasta she'd taken, and Susan stared suspiciously at the blush climbing up her mother's cheeks. "Yes, the roast is very good, Keith." She'd only had a bite of it so far, but Susan wondered if she'd tried some more of Keith's meat, either while shopping or in the hours before dinner. "If you want to take over the cooking from now on, I'm fine with that."

"I don't know about that. Wouldn't want you to get lazy. And there's nothing quite like having your Mom serve you."

This time, she didn't seem to notice anything unusual, just said, "That's sweet. At the very least we should set up a schedule so we know who's doing what on what day." They ate quietly for another minute, before Mom spoke up again and said, "So, I was thinking..."

"Uh oh, that's a bad sign," Dad jumped in automatically.

A glare shot his way before Mom continued, as though he hadn't said anything, "Since tomorrow's Sunday, why don't we go to church?"

Nobody wanted to be the first to speak, even though it would break the awkward silence. As a family, they were the kind of believers who sometimes went to Church on Christmas or Easter, if they didn't have other plans, and had been that way at least since shortly after Susan's baptism. Religion just wasn't really talked about, it was assumed everybody believed, but that they were saved merely by the belief itself and didn't have to do any work at it. Now Mom was suddenly suggesting they give up their Sunday morning.

"If you think it's a good idea," their father said finally, although the skepticism in his voice was clear. "I suppose it couldn't hurt."

"What's the matter, Mom? Did something you feel the need to confess to?" Confession wasn't even really a thing at their church.

"No!" Her mother denied Keith's joking suggestion so adamantly that Susan knew she had to be lying, that that was the whole reason for this, she was feeling guilty about something and thought going to Church might help. The only question was, did Mom feel guilty for her fantasies or for acting on them? It was too much to hope she was feeling guilty for whatever was going on with her co-worker, something Susan still didn't like thinking about. If it was about that, she would have brought up church yesterday, wouldn't she?

"Hey, I don't judge, we've all got sins," Keith continued. "And if you think you need to get right with God for something, more power to you. But you know me, I like to sleep in. So I'm going to pass. I think I'm good."

Mom seemed to deflate a little, like she'd expected Keith to jump at the chance, which was a silly thing to expect in Susan's book. Then again, she had complete faith with him thanks to the marker, maybe that included a lot of unrealistic expectations. She didn't seem to fight it, though. "Then I guess it'll just be the three of us."

Susan let the moment hang for a few awful seconds, hoping Mom meant some other third person, then cleared her throat and said, "I don't really want to go." The boldness surprised her, but Susan just couldn't picture herself sitting in a stuffy old church, listening to a boring sermon while super horny and needing a fix of cum. She'd probably break down and start masturbating, or flashing the priests in the hopes one would molest her or something, and she really didn't want to do that. Necessity was, it seemed, the mother of bravery, as well as invention. I wonder if bravery and invention ever had sex.

"You could really benefit from it, Susan," Mom said, and the way she stressed 'you' it felt like she was saying, "You're a dirty girl masturbating all the time and you need to beg God to forgive you."

"I, uh..." her thoughts raced wildly and she brushed a lock of hair out of her vision as she tried to come up with some excuse they would buy. "I think I might be catching a cold. I don't want to make people sick there." It sounded fake, even to her... it was too bad her parents didn't have the same kind of faith in her as they did in Keith.

"I'm disappointed in you, Susan... lying to get out of Church." Susan's head sank as she blushed, realizing that that was exactly what she did.

Her brother surprised her though. "It's true, though," he said. "She was saying it earlier. Probably caught it from one of her friends. I hear there's something going around. And you don't want to make the whole Church sick."

"Oh, honey, I'm sorry," Mom said. "It's just I haven't noticed anything weird. It's okay, maybe we can go next week."

"Really?" Keith said. "You're not going to go just because we aren't? It's not really setting a good example for us, is it? I mean, if it's really important to go, shouldn't you go even if we don't?"

"Maybe he's right," Dad said. "You don't want them to think that this is just about them."

Mom frowned, and Keith added, "Tell you what, you guys go, and I promise I'll make Susan watch one of those megachurch channels, then when next week or whenever Susan's feeling better, if you still feel it's important, we'll all start going." Susan looked at him, but he didn't seem at all worried that he might have to start giving up his Sunday mornings. He must have something planned, she realized, then decided that he didn't even need to. If he wanted to get out of it, he could just write "doesn't want to go to Church" on Mom. Or maybe just rely on his fast-talking their way out of it when the time came.

Or maybe he assumed that, by the time next week rolled around, Mom would be too ashamed that her children are fucking in front of her to want to set foot in a Church all on her own. If that was his plan, she'd have to try to talk him out of that... but everything else sounded good, especially if it meant Mom and Dad out of the house on Sunday mornings so she can Keith could have fun. If Mom accepted.

After chewing her son's deal over, along with a mouthful of food, she says, "Fine, you're on. But both of you are still welcome to join us tomorrow if you guys change your minds."

"So is this a good time to ask if I need to go too?" Dad asked, then, responding automatically to her glare, raised his hands defensively and said, "Kidding!" But his automatic grin slumped again when she wasn't looking and he looked very much like someone who was volunteered for something that held no interest for him.

A few mouthfuls of food later, Mom pushed her plate away from herself, still containing a half-eaten slice of roast, and stretched back with her arms behind her back. "So, Keith," she said, while stretching, almost as though to get his attention while her breasts were prominently thrust up and forward. "Have you been making the most out of your summer so far?"

Keith's smug grin returned, looking back to Susan for a moment. "I'd say so."

"Any summer romances I should know about?"

A part of Susan wanted to say, "Yeah, me," but that would go against all of her own plans, so she had to play the naive little sister and look interested in what he'd say.

"As hot as I am?" Keith said. "Trust me, I do all right."

"When you do find someone special, you should have her over, your father and I would love to meet her. Or him, that's okay too, not that I think you are like that. But there must be someone you've got your eye on, even if you are beating off admirers with both hands."

"Uhm, if he's doing that, I'd really rather not see it," Dad said. "I'm fine with it, just out of my sight, please."

Susan looked at her father in confusion, then at the glare Mom shot him. "What?"

"Never mind," he said, then reached out to point at Mom's plate with his fork. "You going to finish that?" Mom raised the plate, though she still seemed angry at whatever Dad had said, while he dragged the unfinished meat away. "But you're mother's got a point, you should be out there ladykilling." He cleared his throat. "Again, not literally."

"So, is there?" Mom asked. "Someone you've got your eye on?"

Keith now had his eye on his little sister, literally, but then looked away and said, "I don't know, there's a cute girl who works at the pool I think is pretty into me." Tricia, Susan remembered. Not long ago she was trying to set her brother up with the girl. Now that thought was so far out of her mind that it gave her a nervous sick feeling.

"You should invite her over some time. For dinner. Now that you're finally ready to show off these mystery cooking skills you've been hiding... well, you were already a catch, but so much more. Girls love guys who can cook. "

"I don't even have her number, Mom."

"You know where she works. You can take Susan and... oh, right, she's sick." Ha, Susan thought. "Well, you can go on your own one of these days, send Susan off to one of her friends. I have no doubt that if you just go over to her and have confidence, you could have her agreeing to come right here on her day off."

"Here?" Susan asked. It was one of the dating rules that, at the time, seemed to apply to both of them... no opposite sex 'friends' in the house when the parents weren't home. A rule that didn't seem to make sense at first because Susan had girl friends of hers over when only Keith was there, but they explained that that didn't count because it wasn't one of his friends, but that if he wanted to bring a girl he knew over he wasn't allowed to, without supervision. Suddenly, though, that rule was out the window. She suspected it would still apply to her.

"Well, he's still got to watch you, most days, so if he wants to hang out with a girlfriend, it only makes sense that he brings her here. You don't want to cramp your brother's style, do you?"

"I don't even know what that means," she said, although really she had a sense of the term. "He doesn't even have a style."

"Doggy," Keith said automatically, then grinned, and added, "Cowgirl, Reverse Cowgirl."

"Don't be gross," Mom said automatically, but didn't chastise him any more than that. "She doesn't even know what any of that means."

"You'd be..." he started, but Susan reflexively kicked him, not full-force, but the side of her foot against the side of his leg, just to remind him to be careful, and he did in fact stop, though she couldn't stop from blushing. Mom already knew she knew way more than she probably 'should,' was this just a case of family all lying to be polite? "Yeah, you're probably right."

"And you shouldn't either."

"Sure, Mom." He finished off the last bite of his meal, then said, "Anyway, I'm done. I'm gonna go up and play some games, I think." He slipped out of his chair without even asking to be excused. "You can come up and play with me later, if you want," he added to Susan, ruffling her hair. "If you're not sick of shoving meat in your mouth."

Susan held her breath, but her parents didn't seem to notice, acting like he'd said "When you get sick," which would suggest that he meant when she was done eating, instead of "If you're not," which suggested that that was going to be part of their 'playing together.' Then again, maybe it was another instance of everybody knowing what was going on and yet pretending not to. It was so hard to be sure, and it mattered a lot. If she knew everyone was pretending, she could just relax and pretend along. But if they just hadn't noticed, then it was another close call and something she had to put a stop to before they finally did catch on.

The only thing said about it after he left was when Mom took his plate, and her own, into the kitchen, she stopped by Susan and said, "I don't want you sleeping in your brother's bed tonight. You don't want him catching your cold, do you?" She shook her head, and Mom moved on, and Susan spent a few minutes trying to figure out what THAT meant. She finally decided that it must mean they didn't realize what was going on, otherwise wouldn't Mom have advised her not to shove her brother's meat in her mouth? That was good, in one way, even if part of her wanted to just believe things could continue with everyone pretending.

Susan picked at the rest of her food, leaving a couple bites of the pasta and most of the salad, before looking at her dad and asking, "May I be excused?"

"Sure," he said. "Give me your plate." Dad often finished off anything she left behind, though rarely had that included slices of a cucumber she'd cum on. So although she'd been excused, she stood off by the wall and watched fascinated as he dug into the salad like it was more than a chore, and she couldn't help picturing him licking her with the same enthusiasm. It was something Keith had only done briefly a couple of times, just enough to let her know that it felt really really good... maybe if Daddy did wind up treating her like the fuck toy she was, he'd be more eager.

Her thighs squeezed together and she realized her hand was on her stomach and almost ready to sink below her pants right there, and she shuddered, then reminded herself of the problems it would cause, and started up the stairs. She really had to have a talk with her brother.

***
Chapter Fourteen:

Susan had a plan when she entered her brother's room, and even how she got there was part of the plan. She knocked quietly, waited for him to invite her, better to not make him mad. Unfortunately, the moment she stepped inside was where the plan she had seemed to evaporate into a million conflicting threads of plans as she second-guessed every course of action she'd been so committed to before. Now she wondered if maybe it'd be better to try to have sex with him first, so he could think about what she had to say without his mind clouded with horniness, or if it would be better to talk to him first so she could use her pussy to tempt him into agreeing. If she should just bring it up suddenly or wait until he got close to the topic, make it look like it was a natural part of the conversation. If she should use reverse or regular psychology.

After telling her she could come in, he ignored her at first to finish up a task on his computer game, then looked over his shoulder at her, with a smirk, and said, "Dad really seemed to enjoy your special salad dressing, huh?"

"You need to stop," she said. It just slipped out, far more angrier and confrontational than she intended in any of her plans.

He spun his chair to face her, eyes looking suddenly dark and angry. "Oh, I do, do I?"

Deliberately softening her voice, trying to sound submissive, "I just mean... please, would you listen to me for a second?"

"Do I look like I'm not listening?"

She sighed. "It's just... look, I'm not saying stop what you're doing with me. I don't mind it." No, honesty would be better here, she thought. "Okay, I like it. A lot. But... it's starting to get dangerous, what you're doing, like, you're trying to show off or push things further and further and..." She took a breath, changed direction, decided now was the time to ask the burning question. "Have you had sex with her yet?"

"Who?"

Who else? "Mom. You were alone with her, and you were like so late, and..."

He smirked. "What's the matter, jealous?"

"No." She wondered if honesty was the best policy there, but it was too late, and besides, he was a jerk, so knowing she was jealous might make him more likely to do it. Reverse psychology, she decided, would be the best play here. "I don't care who you have sex with, but, just tell me..." If he had, then maybe this was all for nothing.

"I haven't," he said. "Promise."

"Okay, good. I'm just saying you shouldn't. And you need to stop shoving us in their faces, too."

"I need to, do I?" Again, it seemed like he was starting to get angry.

"This is for your sake as much as mine!" She took a breath, then said, "Look... I'm still your fuck toy and I'm also your sister, and the sister part isn't going to change no matter what... and even if we lost the marker right now, okay, I could still have fun being your fuck toy after the marker ran out, I think." Maybe she'd suddenly change her mind, but she didn't think so. "But with Mom and Dad... if they find out what you're doing, it'll change everything, forever."

"Relax, you've seen how easily I can manipulate them."

"Because of the marker," she pointed out. "What happens if it runs out?" The marker itself said 'never runs out,' but before he could point that out she added, "Or you lose it? Or something else happens, and the marks fade away and you can't control them anymore? If you had sex with Mom, or made Dad have sex with me, or even if they just knew we were doing it. They're not going to forget that. It'll be indelible." She stretched out the word, savoring it now that she'd finally hit on the right word it felt like lightning. The marker had warned it all along, it wasn't just about the words themselves, but about the changes that came from what you did under its influence. "Who knows what they'd do, to you, to us, to themselves even?"

"It won't run out. And what makes you think I'm ever going to be dumb enough to lose it?"

Finally she was able to break out one bit of the argument she'd planned in advance. "I bet that homeless guy we got it from thought the same thing." Keith tilted his head like he was considering the point. "All I'm saying is we don't know. This is magic. With a capital M." Although she didn't actually know if it should have a capital M if she were writing this. "Maybe it's like one of those magic things in the stories, where whoever has it is cursed to lose it eventually, no matter how hard they try to hold on to it. And you're acting like you don't care if you keep what we've been doing a secret and that's going to get us in trouble, you especially. I'm never going to tell on you, I promise, but... let's just keep doing things the smart way and keep Mom and Dad out of this, okay?"

He seemed to be thinking it over. "But it's so fun teasing them," he whined.

"There are other ways to have fun," she said, and tugged down the front of her pants. He didn't seem to be too impressed, unfortunately, but maybe he was still thinking over what she'd said. "And if you promise not to push things with them, I'll let you use the marker on me again."

"You'll 'let me'," he said, although this time he seemed more amused.

"Some of the stuff you wrote is starting to wear off." This was a big exaggeration. They weren't looking quite as fresh but they were still easily visible, only a couple days old... although somehow it felt like much longer. Still, it was all she could think of to offer. "I'll get naked right now and let you fill it all back in. No fighting or trying to get out of it. Even the stuff I don't like, I'll go through another few days and then promise to do it again whenever it starts to fade."

"And what about new stuff?"

She shrugged. "Well, I can't stop you can I? Just... maybe you could ask me just in case I think of something you don't. Like when you almost made me literally brainless." She actually didn't know if it would happen like that, but thought he could use the reminder.

"I still think you'd be cute brainless," he said, and then made a point of correcting himself, "Figuratively brainless. But you do come in handy now and then. So you have a deal. If you submit yourself right now."

He barely had to say the words and she was shedding all her clothes. While she sat on his bed to pull her socks off, he went for the lockbox that he kept the marker in. "We'll do the back first."

Without a word of complaint, she lay on his stomach, although it was only then she realized how nerve-wracking it was. It wasn't that she was afraid of the words staying on her... she was starting to get used to them, and the effects they had on her, and she really did feel she could stay like this... but when she had her back turned, he could write anything and she wouldn't know until after, couldn't try to talk him out of it. It was exactly the kind of jerky thing he might do, surprise her with some new rule, despite his promise, which wasn't even actually a promise now that she thought about it. She just suggested it and he hadn't said no.

Susan flinched when she felt the cool tip against her skin, but it seemed to be in roughly the same spot as "Super-Horny," and the letters, as best as she could follow them by feel alone, seemed to match. He moved on and made sure she "Loves Anal Stuff" again. If he was doing it all in order, cum addiction would be next, and though she curled her leg back so he could have easy access, she decided to press her luck. "You know, you don't HAVE to rewrite everything, if you don't want."

"Oh? And you'd like to do without this one, would you?"

"It might be better to just let it expire... or even cross it out, just to see what would happen."

"Really? I mean, I'd love to, but doesn't it kind of go against your whole argument?" He seemed genuinely puzzled for some reason.

Did he actually think she'd want to keep it? Even if she sort of liked sucking him now the addiction was inconvenient. "What?"

"You just gave me a big speech about keeping it all secret, right?"

"Yeah. And me not being addicted to cum will make it easier to keep it all secret."

"Oh!" He let out a snort of amusement as he put it together. "You meant this one." He tapped her foot with the side of the marker.

Susan herself was still confused for a moment. "What else would I...?" Then she remembered, the other one on her back, that read 'Infertile,' so she couldn't get pregnant. He thought that she was suggesting they cross it off to see what happened. And... wait, he also said he'd love to. Did that mean he wanted to get her pregnant? Her face flushed and she felt the cleft between her legs start to get wet at the idea. "No, it's probably best to keep that one then."

"Yeah. Let's keep both of them, in fact." She felt him mark on her back, again, and then moved to her foot and, just like that, she was forced to live with her cum addiction a little while longer. When he was done, Keith slapped her other butt-cheek, said, "These other ones are still pretty fresh, so we'll skip them." She was still rolling over the idea in her head, that her own brother might want to get her pregnant, and trying to deny how much that turned her on despite feeling her body respond to the thought and make her own internal monologue a liar. "That means turn over."

"Oh," she said, and quickly rolled over, bent her legs and drew them up beside her so he could have easy access to rewrite "Cock Sucker" when he chose. The position made it obvious that her slit was wet and slimy with arousal, especially when he leaned in close to write on her inner thigh. Less obvious was the sudden hardness of her nipples, but he had to know she was horny... she just hoped he didn't piece together why, or she might never live it down.

Maybe it wasn't even because that, she told herself. He'd wrote "Super Horny" on her, and even if the words were already there in the same spot, maybe it counted as writing it twice, and made it twice as powerful. She should have thought this through.

"I still haven't decided what new to write," he said. "But I think I decided where. I think you'd look good with one right here." He traced an arc over her mound with the back end of the marker. "It's got to be short and punchy and to the point though. Maybe I won't do it right away... you're going to submit for me whenever I decide to, right? No fighting?"

Susan nodded. "As long as you keep your promise."

He made a sound, like a "hmmm" that sounded sort of like agreement but infuriatingly without actually saying it, as he went to fill in "Fuck toy" across her chest. "You know, I was never going to let Dad fuck you."

That was a surprise. "Sure seemed like you were going that way." It seemed bizarre to be disappointed he wasn't when she'd struggled so hard to prevent it, like she was losing the fantasy that he might break their agreement and do it anyway.

"Nah. You're MY fuck toy. I just thought it would be hilarious if he really wanted to." He suddenly reached out to her breast, or rather to her nipple on a mostly flat chest, and pinched it roughly, making her gasp with pain, pleasure, and surprise, all at once. "Sure seems like the idea turned you on, too, though."

"Don't be ridiculous," she lied. Turned out she hadn't entirely lost the fantasy. "That's just my super-horniness."

"And I wasn't going to fuck Mom, either." She felt her body relax with that news, though her skin tingled with electricity, especially around her nipple. "Probably."

Her heart sank again, not just at him teasing her like that, but also for what it meant. "You mean I agreed to all this for nothing?"

Her brother flashed her a grin. "No. You actually did change my mind. I was working up to getting Mom and Dad to accept me fucking you right in front of them." He'd now finished remarking her as a fuck toy, and she'd been holding still as he did... now that the marker was pulled away, she let out a deep breath that sounded like a breathless sigh of someone who found that idea really hot despite knowing it would be an incredibly bad idea. Which was fair, because that's exactly how she felt... a part of her even told her it wasn't a bad idea, it would make it that much easier to deal with her cum addiction and super-horniness. "I was hoping to make them catch you giving me a blowjob when they got home from church tomorrow." She pictured the scene, her parents walking in on her, jaw dropping, as she sucked on Keith's shaft like a shameless whore... and she realized how easy it would be, too. Ever since she'd been given the "Cock Sucker" mark, she couldn't keep herself from sucking a cock Keith's cock when she saw it close to her mouth, at least until she was physically pushed away, so all he'd have to do is pull down his pants down and expose himself right as they walked in the door and she'd not stop until he'd cum down her throat with their parents watching. Possibly not even then. Now that would be an indelible event in the family history. "But you made some good points, so we'll play it your way. Maybe if we're still going strong in a year."

***
Chapter Fifteen:

Keith clicked the cap back into place, done with all the remarking that was more than a day old, and apparently he still hadn't thought up a new mark for right over her pussy. That was okay. Susan couldn't count on her brother being nice and letting her get away without one, but she could hope he might forget about it.

Especially if he got distracted. "So you feel like using your fuck toy?" Her eyes grew wide with an idea. "We can do it while I've got the vibrator Mom got me in my ass." Nobody to suck on, unfortunately, but two out of three wasn't bad.

"Whatever happened to keeping a low profile?" He took a second to put the marker back in the lockbox, which Susan had to think was a good thing. Out of sight, out of mind. "They could easily walk in on us, you know."

"No they won't. They'd at least knock, and then believe any story you gave."

"Still, it's a risk. Maybe we should wait for tonight, after they go to sleep when they won't hear anything."

Susan knew her brother was teasing her now. "Come on, you know I can't wait that long," she whined. "We have to take some risks, unless you want to cross out some of these marks. Besides, we can do it in my room. Mom won't interrupt if she thinks I'm using it by myself, and she'll never think you were in there with me." Even if she couldn't find him anywhere else, Susan bet Mom would think he'd just gone out with friends without her noticing.

"Fine. But if we're going to risk..." He grinned. "Dare you to run from here to your room naked." He held up one finger. "And by dare, I mean if you don't I won't follow."

She glared at him, but she needed it too badly, and the risk didn't seem all that bad. As long as their parents weren't already upstairs during the few seconds it would take to get out of his room and into her own, there was no chance for them to see anything. And she was pretty sure they were still downstairs. "Will you be lookout?" she asked.

"Sure."

"And carry my clothes?" Mom or Dad finding what she was wearing at dinner on her brother's floor had to raise some suspicions no matter how much they trusted him.

"You're asking a lot," he said, even though she really wasn't. It's not like they weighed anything. "But okay."

A half-minute later, she was breathless, in her room, and excited enough at the thrill that little bit of danger provided that she hopped on her bed and began rubbing her pussy with one hand while waiting a few seconds more for her brother to follow. He smoothly closed the door behind him when he did, then tossed her clothes in a sloppy pile on the ground and began to undress. "Where's your toy?"

She scurried along her bed until she could reach her nightstand drawer where she left it, then retrieved it and, while she was there, the gag as well. It might come in handy. With her legs spread, she worked the head of the device around her rectum, which was already magically lubing up, and then pressed it halfway in, hoping he was turned on rather than disgusted by the act, which seemed like something a raunchy porn star would do.

The size of his dick seemed to indicate that was a quality he liked, though he did say, "You know, I don't think that's supposed to be an anal vibrator."

Her forehead crinkled in confused consternation. "What's the difference? It vibrates, and it fits in my ass."

"Yeah, but anal ones are usually bigger, with a wide spot on the end to make sure it doesn't slip inside."

She'd noticed that danger too, before. "I'm careful with it."

"Still can't believe Mom got you that." He shook his head in amusement. "You don't even know how to use a vibrator properly. It's like handing a gun to a monkey."

"I know how to use it," she said indignantly, and to demonstrate, turned it on, allowed the waves of motion to emanate out and roll over her whole ass.

"Even a monkey can flip a switch."

"Great, so you can use it too," she said, hoping he wouldn't be too angry at the playful teasing. "And I'm sure it'd feel nice on you too. Come and see." She spread her pussy lips with two fingers, and smiled as he got into position.

As she felt the head of his penis push past her pussy lips and inside, and it seemed almost like he was vibrating inside of her just as much as the toy in her ass, and so much better than a cucumber, especially because she could feel his whole body, warm, powerful, and connected to her by something magical. A thrust pushed that connection all the way. "Heh, I can feel it a little too. Pretty nice, actually."

"It feels really good when you cum." She squinted at him. "I'm allowed to cum, right?"

"You can cum when I do." That was all right, and she smiled, let him slide in and out of her a few more times, squeezed back up on him to intensify the vibration, when he let out a loud grunt. Finding it a chance to needle him, she reached around on her covers, then picked up the gag and held it towards him while he fucked her. "What's this?"

"Just in case you're going to be loud," she said. "Don't want Mom or Dad hearing you in here."

He held her just under her arms, thumbs playing with her erect nipples, and said, "You'd need that more than me."

"You can just tell me to be a quiet fuck toy," she pointed out, and then tried to remember what she was the last time he told her. She didn't feel an urge to be particularly loud or quiet, so maybe it had been long enough that she "reset" to her normal self.

"If I feel like I need to be quiet, maybe I'll just stick my tongue down your throat. Fix the problem for both of us."

That got her even more aroused than before. She still couldn't cum until he did (and, as a fuck toy, would regardless of how horny she was), but the thought of him making out with her again inspired more impassioned movement, her legs hooking behind his back and pulling herself on and off him even as he pushed in and out. "Works for me," she said, trying to hide how much she wanted it in her voice, though with her need to take a hiccuping breath between words it seemed less than convincing to her own ears.

"Maybe I should make you cum every time I kiss you," he said.

She said "Okay," before he had a chance to continue, but he did anyway.

"That way if you're bugging me I can just take care of you quick."

"Okay," she said again, now a higher pitch.

"Of course, you'd still have to be my fuck toy whenever I wanted it."

"Always," she said, and she meant it, if he wanted her to be his fuck toy, available whenever he wanted it, for the rest of her life, right now, that sounded like a pretty good deal to her. She'd still rather do without many of the marks, and others relocated to more easy-to-hide places, but she liked being important to her brother, even if only as his favorite thing to fuck whenever he wanted. And it sure was fun for her. A little squeal escaped her as the force of his motion against her, inside her, suddenly crossed some threshold and although she didn't cum, a wave of pleasure struck that was stronger than she was prepared for.

"Hey, weren't we supposed to be trying to be quiet?" he teased her, but he didn't seem worried at all. He didn't actually have to be, from the squeal alone. It didn't matter if Mom heard her squealing in pleasure... or Dad, probably, as long as he wasn't an idiot and thought she was in danger or something. And Keith didn't seem inclined to stop, or even slow down. The real danger came from someone hearing their conversation above the sex sounds, but he didn't seem particularly concerned about that, and to her surprise, Susan wasn't either, at least not right then... she'd liked what was being said so much that she hadn't even thought about it until then, and even once she did... some distant part of her told her it should be a lesson that when she got too horny she got stupid, but the stupid part of her wanted to enjoy it as long as possible.
And then the stupider part of her had a brilliant idea. "So shut me up then," she grunted, hoping he'd take the bait. A few more seconds of vigorous thrusting combined with some intense eye-contact, and he did, leaning in close, and she stretched her neck up to meet his lips, opening to admit his tongue which forced its way inside her as he slammed into her from below.

It was exactly what she wanted, although she also would have been satisfied if he just used the gag, or better yet, covered her mouth with his hand. It was surprisingly enjoyable needing to make noise and being physically stopped from doing so, her voice beating against an overwhelming resistance, like being totally possessed... but when it was done with a kiss, and all the feelings that went along with it, it was even better. She imagined what it'd be like to orgasm every time she kissed her brother like this... it seemed surprisingly plausible, and then suddenly she didn't have to imagine anymore, as she felt an orgasm explode upon her as Keith's cock started jerking and squirting off inside of her pussy, something she couldn't feel but could only imagine, the feeling was lost in the other sensations. Her entire lower body, seeming like it was made of pure vibration itself. Her moaning into her brother's mouth, the hungry moan in return, pulling away into a bite on her lips. Both of them melting away into nothing but one writhing mass of pleasure.

Keith broke it to take a breath, one right in her face that smelled like meat burps... the romance was gone. His breath probably smelled that way all along, but she only noticed it when they were out of that perfect moment. Even now she didn't mind it, would have put up with it to stay near him except that he seemed to be pulling away against the legs on his back. She disentangled them and they parted, in silence except for the still faint buzzing of the vibrator. She reached down, found that it was in deeper in her ass than she thought, almost like a few more bumps and it would have slipped all the way, her ass closed up around it.

Keith noticed it too, after he stepped away and she started working her muscles to push it out and hit the switch that would turn it off before her butt went completely numb forever. "Jesus, Suze, you gotta be careful with that thing."

Her fingers snagged on the switch, hit it, and started to pull, so now instead of taking a vibrating poop it felt more like removing a part of herself, a malfunctioning part, resetting herself back into the version of herself that could think of stuff other than sex. Mostly, at least, for her fingers still worked to feed herself with the cum dribbling out of her while he got dressed. "It's your fault, you pushed it in more than it should've."

Keith pulled his shirt back on, making him once more presentable to go outside a closed room, as if their parents weren't now wired to trust him even if he left his little sister's room naked and smelling of sex. "Wait here," he said, and she continued feeding on his cum while he left, checking only for a minute to see if the hallway was clear.

A minute later he returned, magic marker in hand, and Susan's heart started thumping with excitement again. Her cumgathering turned into an eager rub of her pussy, near but not on her clit, as she wondered if she was going to bear a new mark, maybe one she even liked this time.

Instead, he grabbed the vibrator, and began writing on it. When he was done, he showed it to her. It now read "Always sticks partly out." "There," he said. "That should help. Anything else you want on it? Maybe I can make it wiggle or something, too."

Wiggling might be fun, but she didn't know how it would happen, maybe it would move weird like a snake or something. She liked the hard vibrating feel well enough not to mess with it, but she stared blankly and tried to think of something to ask for just so this rare opportunity didn't go to waste. Her mind seemed empty. "Not right now." After a second, she added, "Thank you," because now that she'd thought for a second, it was really sweet and completely unselfish, something he must have done because he cared about her, even though he was a jerk.

"No problem." He tossed the vibrator back to her, then ruffled her hair and turned to leave again. "Try not to bug me until bedtime."

"Um..." Once she had his attention again, she was going to tell him that Mom said she wasn't allowed to sleep with him tonight because of her being 'sick,' but then realized it wasn't important, she could just come after they fell asleep and leave before they woke up. It was always a little thrill disobeying your parents. And besides, she had a more important concern. "Aren't you going to write what you said?"

"What?"

"You know, about cumming every time we kiss?"

He made a scoffing sound, like a soft chuckle, "Nah, that was just sex talk. You seriously think I want to be kissing you all the time just to cure your horniness? When it's so much more fun to watch you need it more and more, and then fucking you when I think you've suffered long enough?" Her heart sank, and he left, shaking her head. "You don't get off that easily."

After he left, she reflected about how that might be the first time that her brother left her disappointed to not be getting a magic mark, and fell back onto her bed with a sigh. When she was done moping about that, she rolled over, felt the vibrator on her side, a sting of pain as it pressed against her the wrong away, and fished it out, looking at it, then smelling it, and she remembered her mother's advice and realized what she should have gotten Keith to write on it. Self-Cleaning would help a lot... maybe she could ask him when he was in a better mood, but until then, she really should remember to wash it.

Her nightly routine seemed to be the best time to do it... she could sneak it in after brushing her teeth or in the shower, maybe hide it in a towel or something if her parents were around. Until then, she tossed it and the gag in her drawer and started to put the clothes she was wearing before her last fuck toy session with her brother back on. She had just pulled the shirt over her head when there seemed to be a weird shuffling sound that made her freeze in fear, solely because there shouldn't be anything making a sound at all. When she finally got her head through the neck hole, she looked in the direction of the source and saw her drawer partly open... and the head of the vibrator dangling out.

She pulled the rest of her shirt on and walked over cautiously, picked it up, and read again what her brother wrote on it, this time aloud. "'Always sticks partly out.' Oh, shit."

***
Chapter Sixteen:

It wasn't as bad as she first thought, Susan decided after she did a few experiments. Like most of the marks, there seemed to be some compromise with the needs of reality. Just as she couldn't be super horny every second, the vibrator couldn't always stick partly out if there was no physical way for it to do that without defying gravity. It was only because a little bit of shuffling could push the drawer open and there were some notebooks inside to for it to stand up on and poke its head out. If she secured it carefully, she could hide it, but it seemed partly alive, as well. When she tried to shove it in an old school pencil bag, it wouldn't fit all the way in even though there was enough room, like it was somehow fighting back. If she wrapped it in anything remotely loose like a towel, it would slowly squirm its way to a gap. But sometimes it seemed to be content to be sticking out of something while hidden by something else. Wrapping it in a shirt in a drawer, for example, where it was sticking out of the shirt, seemed to satisfy the condition, which would hide it well enough unless someone opened her drawer and then saw a vibrator sticking out. Even sticking it in a nearly empty drawer seemed to work, as though it stuck out enough by being the first thing you saw when you snooped around. She'd have to be especially careful if she ever invited friends over now, they always thought looking through drawers was perfectly innocent.

Exploring the boundaries of this mark was even sort of fascinating, like playing with magnets and feeling them move with an almost supernatural force. It was almost as though there was somebody intelligent evaluating the words and deciding whether it 'counted,' and if it didn't, fixing it. The thought amused her as she pictured some weird overworked angel watching everything she did and made sure it violated the condition, although she really didn't think that's what was going on. It was probably just magic, maybe the power of words themselves.

The vibrator's new condition did make sneaking it to the bathroom a mortifying adventure, though, because her dad was upstairs in his room with the door open and possibly could come into the hallway at any moment, and she didn't seem to be able to completely hide the vibrator in any way while she went to the bathroom. She ended up walking there with it sticking out of her waistband, but when she tried keeping her shirt over the vibrator it kept slipping out completely and onto the ground before she got out of her room, and she mentally cursed at the imaginary angel and then grit her teeth and let that side of her shirt be tucked under the toy, so the edge of it could be seen from anyone on that side.

She sweated every step, even walking on the side of her feet so as to make less noise just in case it made her father come out and wish her good night, see the vibrator and leave him with another indelible image of his little girl being a super-horny sex fiend, assuming he knew what it was. But she passed his door quickly and he didn't even have time to look up before she was out of sight and, seconds later, behind a safely locked door in the washroom.

Washing the vibrator, after she took a quick shower and brushed her teeth, took up more time than she planned on, mostly because she spent some effort trying to see if she could erase the mark. It was more curiosity than anything else, she really didn't expect it to work but she remembered so-called permanent markers didn't stick on everything, and even the magic marker faded from skin, eventually. A few minutes of vigorous scrubbing with soap didn't seem to make a difference, though, and it cost her in another way, when she heard a soft knock on the door. "Sweetie, you going to be long in there?" It was her dad's voice. "Your mom's monopolizing our bathroom and I just need to go quickly."

"Uhh, yeah, just a second." Her eyes cast around the room looking for somewhere to hide it. She was wearing her towel, and if she tried to swaddle it out in a bundle of clothes it might slip all the way out trying to stick out.

Only one solution presented itself, and that had its own risks. She planted one foot on the toilet seat, pulled the towel up, and inserted the freshly-clean vibrator into her also freshly-cleaned (but, she felt, by definition only mostly-clean) pussy, pushing in all the way and letting out a choked-down squeal of pleasure when it reached the point where the vibrator's mark seemed to take effect and it would no longer penetrate. Instead, it seemed to cling to her pussy lips and resist any force sending it deeper. She dropped her leg and used every muscle she could down there to hold it in place while she smoothed down her towel, grabbed her clothes, and, taking a deep breath, unlocked the door.

Her father was, of course, waiting, and his eyes seemed to focus on the part of her chest above the towel, the part that read "Fuck toy" even though he couldn't see it, but his gaze seemed to be full of hungry longing all the same, for a second or two before he became very fascinated in the corner of the bathroom doorjamb. Susan slipped past him, praying as she did that the vibrator wouldn't come loose and clatter to the floor between her legs right in front of him, clenching tight to prevent that possibility.

She got four steps away when her father said, "Something wrong?"

"Uh, no?" It was definitely still inside her. "Why?"

"You seem to be walking funny."

She shrugged, not sure how to answer that, wondering how he noticed that without turning back to look at her after she was already walking away, and then wondering why he'd do that other than to watch her towel-covered butt swaying as she walked. "Don't you have to use the bathroom?"

"Right," and now he seemed embarrassed, and slipped into the bathroom and she breathed a sigh of relief and escaped to the safety of her room.

Keith, in his typically jerky way, thought it was hilarious when she later explained the situation, after their parents were safely asleep and she snuck into his room to spend the night with him, and he refused to try and cross out or amend the mark. But, after a little persuasion, which involved her performing a strip show at his request with the vibrator in and active the whole time, he did agree to mark the device with the words "Self-Cleans When Not Being Used."

The longer phrase was her idea, after he agreed to just "Self-Cleans," she realized, "Wait, what if it cleans when it's inside me?" Would it consider her dirty, and vaporize her or push her away or sweat out cleaning chemicals or whatever it was going to do to clean itself? "We gotta think about the consequences of these things," she reminded him as he wrote down the additional words she suggested. "You never know when a poorly-thought-out mark is going to get us into trouble."

Turned out, that would be the very next morning. Mom seemed to decide that, since she and Dad were going to Church that morning, a big family breakfast was too much effort to indulge in, so they just had waffles, which was okay in Susan's book. Mom and Dad were dressed for church, which for Dad meant a suit much like the one he worked in and for Mom meant a long dress with a pink floral print and hardly any cleavage. "You can still come along, you know," she said to Susan, who was stuffing her face with a sweet syrupy mouthful. "You seem like you're feeling all right today, maybe a good night's sleep, alone, was all you needed."
She was hardly alone, but of course Mom didn't know that, because she blearily snuck back to her own room just as the sun was getting up, with a bellyful of her brother's cum but still far more horny than she'd like, since he hadn't wanted to give her one last fuck before she left, under the theory that they'd have the whole morning together. "I'm still not feeling right," she said after swallowing, and then shot a look at her brother for assistance before Mom decided that she was just faking.

"Yeah, I saw you needed to lubricate your throat this morning," he said with a smirk. "Probably best you stay home with me." He turned his gaze to Mom and added, "Don't worry, I'll take good care of her."

Mom nodded. "If she gives you any trouble about watching the church channel, you let me know." Susan had forgotten her brother made that promise, casually... but of course Mom would believe he meant it. She must have made a face when she was reminded of it, because after that came, "It's only fair, Church should be done as a family and if you can't come along the least you could do is watch."

"I won't even be watching you," she said. "It's just some dumb megachurch."

"It's all God, that's what matters."

"If you say so," she muttered, only partly able to keep the dubious tone out of it. Susan's own opinion of God had changed since the marker came into their lives, to a level she wasn't even aware of until she thought about it... before He was this vaguely comforting entity that she wasn't entirely sure she believed in for real, or if it was just a good story. Now, it was hard to imagine Him allowing this business with the marker to go on, so if he was real, either He wasn't very powerful, or He was a kinky pervert even bigger than Keith.

"She shouldn't have to spend her whole morning watching religion," Dad said, which surprised her. He'd been mostly quiet, almost zombie-like, and skipped breakfast entirely except for a coffee. "Kids are supposed to have fun, do kid things, like, watch cartoons."

"I think she's had more than enough time to watch cartoons," Mom said. "She could use a more wholesome influence."

"She's not the only one," Keith said.

"What's that supposed to mean?"

"Just that I'm sure everyone in this family's got some things they need some divine forgiveness for." He leaned back cockily. "Except me, of course."

"You have been pretty good lately," Mom conceded, and part of Susan wanted to say "In what universe?" but she kept her mouth shut, knowing it was the unnatural faith at work. "But you don't want to rest on your laurels."

"Oh, don't worry. In fact, I plan to do a good deed this morning."

Mom looked up from her now empty plate, and even Dad looked up. "Really? What's that?"

"Guiding Susan, of course. Mark my words, this morning she'll be on her knees and calling out to God." The interest vanished as this no longer seemed to be new information. Keith then leaned over to Susan and added with a whisper to her ear, "Of course, not necessarily at the same time..." which made her blush and give him a warning jab with her foot. It was the sort of thing that her parents might one day notice if the marker ever disappeared.

They didn't seem to think anything was unusual at the moment, though, as her mother took that opportunity to take her dish to the sink and then asked Dad, "Are you just about ready? We need to be on the road soon if we're going to get there on time."

"Yeah." Her father was normally pretty cheerful, but he seemed to be especially grumpy on weekend mornings when he felt deprived of sleep he felt entitled to... having to wake up earlier than usual to go to Church seemed to bring that out in him today. "Just let me pour the last of this coffee down my throat." He drained the cup with a grimace, then stood, leaned over, said conspiratorially to the two of them, "Honestly, I'd much rather be here with you guys." Mom had left for the living room and could be heard getting her shoes on.

"I'll bet," Keith said. "Certainly would be a lot more fun, right Suze?"

She glared at her brother, but said, "Sure."

"I'm sure your mother will get over this new obsession soon," he said, then seemed to suddenly remember he was supposed to be setting a good example, so he added "Not that I have anything against Church." He put his coffee mug in the sink, then also left to get ready to go.

As soon as the door closed, after they'd said their goodbyes, Keith got up from the table and went to the window, watching to made sure they actually left and didn't come back to get one last forgotten item, then came back and said, "Okay, they're gone."

"Good. Weekends are gonna be so hard," Susan complained. "It's hard enough waiting till you want to do it, without having to worry about them being home all the time."

"Awww... is somebody jonesing for her sperm fix?"

"A little," she admitted. She'd blown him early in the morning, then slept a little in her room. It wasn't bad, but if he was offering, it would be good to get it out of the way.

"I better take care of you, before you turn into a dirty Snickers ad or something." He stood beside the table, but not near her, and pointed to the floor at his feet. She shot him a look, annoyed that he wouldn't just come to her but instead had to have her get out of her seat, when he said, "Hey, I promised I would have you on your knees today."

She rolled her eyes but slipped out of her chair. "What, don't tell me you're going to make me watch the Church service too?"

"Oh, I have to. I promised. You don't want me breaking promises, do you?"

He had a smug look on his face, like daring her to suggest it... and Susan had a feeling that if she said he should, he'd just use that as an excuse to break some promise to her... she wasn't sure which one, and considering he was a jerk, he might well break a promise just for kicks, but she wasn't going to give him an excuse. "Fine."

She got on her knees, staring at his bulge, feeling the cocksucker compulsion start to rise in her but knowing it wouldn't take completely over as long as the cock was still in his pants. Meanwhile, he reached over to the table. "Here, I'll sweeten the deal for you." In his hand, when he returned, he had the syrup from the waffles, cap up. With his other hand, he pulled his shorts down while he started to pour the syrup.

It's an idea that must have worked better in his head than in practice... or maybe Keith was learning to be subtler about being a jerk. She was already on her knees in front of him, and the moment she saw his cock come out, she couldn't help herself, she took it immediately in her mouth, heedless of the fact that a glob of syrup was on its way down. It hit her, instead, on her hair, the side of her face, , although yes, some of it did manage to get on his dick. "Jesus, Suze. Learn some self-control, you're a mess."

Can't talk, Susan thought. I'm a cocksucker, and she just shut her eyes to avoid getting any stickiness there, and kept on her duty until he pushed her away. Though, when she was able to taste the mapley syrup on his dick, it did improve the flavor... for about ten seconds, then her body seemed to remember how much she ate of that on her waffles and it became almost sickly sweet. Worse, because it was all over her face the smell of it filled her nostrils as well. She started to feel sick, but couldn't help but power through.

"Heh," her brother said. "It is kind of hot seeing you all sloppy like this," and she concentrated on moving her tongue with an energetic frenzy to try and push him into finishing as quickly as possible, to make his cock throw up before she did.

She just barely made it. When her brother grabbed her by the clean side of her head and forced himself down on her, she knew it would be soon, and sure enough, seconds later her mouth filled with his warm, rich seed, which somehow combined well with the sweetness, at least enough that she no longer felt in danger of throwing up.

After he was done cumming, he gently pushed her away which let her finally take breath, close her eyes while he put his cock away, and then move for the orange juice by her plate. "Jerk," she said after a swig. "Next time ask before you do something like that."

His face darkened. "I was trying to do something nice."

The orange juice gone, she went to the kitchen sink and filled it with water, and also start cleaning the side of her face, feeling guilt start to win out over her rage. The thing was, he probably was. He just didn't think things through. It was a big problem with him. "Yeah, but you know I can't control it when your cock's that close. And I'd just had like a buttload of syrup on those waffles."

"A buttload?" He dangled the syrup bottle between two fingers. "I could make that happen literally, if you wanted."

She tried, unsuccessfully, to get the syrup out of her hair by running it under hot water in the sink, but even on her tiptoes she couldn't get the right angle and felt like she was just getting herself messy... and dangling her butt in front of her jerky brother, which might be dangerous depending on how much he wanted to torture her. "More like if you want," she said, with a bit of a sigh, hoping that her admitting she was at his mercy would make him think twice about the teasing threat. It wasn't even sexy in any way she could think of... he was probably just being a dope. "I'm going to have to take a shower anyway."

He put the syrup down on the table, then waved his hand dismissively. "Go clean yourself up properly," he said. "But when you come back, wear something hot."

***
Chapter Seventeen:

Susan ran to the upstairs bathroom, careful not to touch anything with her now sticky-hand, while trying to figure out what to wear after she was done cleaning. Keith had already seen her naked... even naked with a leash and collar. What counted as hot to someone who knew you inside and out, literally?

A quick shower solved the syrup problem, but she still had no better ideas on the clothes. She left her old clothes on the bathroom floor, then went into her room to dig through her drawers and closet, trying to think through things he liked. All she had to go on was what he chose for her before, the stuff that was a little too small and was destined to be given away the next time Mom decided to clean out her closet. No panties seemed like an obvious move as well. Keith seemed to really get a charge out of that, and she didn't really have any really sexy underwear.

In her old-clothes section of her closet, she found a short dark skirt, about as short as the pink one the other day, which she thought would look really good with no underwear, but none of the tops really had anything going for them besides being a little too short... maybe not wearing a top at all would be better.

An idea struck her suddenly... one she wasn't entirely sure was sexy, but might cut through his jerkiness a little.

It was thinking of the shirt Keith chose that gave her the idea... the one that exposed the words 'Fuck Toy' (or at least, 'Uck To') and then said "Love this Life," beneath it. She had another shirt that had escaped previous charity purges because it still had sentimental value and she wanted to keep it even though she'd grown out of it.

She picked through to the bottom of one of her drawers, and found it. Originally, it was a birthday gift, from Keith, although she now knew Mom probably bought it and told him to give it to her. At the time she loved it and he seemed to like her appreciation, her wearing it all the time around the house. Now, the white shirt was too small to fit comfortably, wouldn't even go down to her belly button and she might have to cut the top off just to get her head in it. Like that, though, she could wear it like some kind of tight tube-top. That was part of the reason she kept it, she thought of maybe one day cutting out the message on the front and sewing it onto something else. It said, in words with a colorful design with hearts on white fabric, "I'm The Lil Sister Of A Super Big Brother."

A part of her still didn't want to damage the shirt at all, but... she was under a lot of pressure to choose something hot, and if she failed, he might find some way to punish her. But even if he didn't think this was hot enough, reminding him of the good times might make him more forgiving, so she went to her work desk and got some scissors, and made the first snip before she could talk herself out of it. Once she'd done one, the rest was easier, and soon everything above the arm holes were gone (along with the words "I'm The"), and a lot of the lower half as well, and she had something she could pull over her head.

It was still tight, but wearable, even if she could only wear it around the house with a perverted brother being the only one home. The words "Fuck Toy" poked out right over the top, no longer obscured at all, and almost like it was part of the slogan, like it said "Fuck Toy Lil Sister." No longer Uck To, if a pizza guy or anyone else other than their parents saw it they'd have to think she was addicted to her brother's cock, but as long as nobody saw it, who cared?

The top came down to just over where her belly started, and it was so tight it felt like her nipples stood out. When she looked at herself in the mirror to check that, on certain angles it even looked like her flat chest wasn't completely flat. It gave her a flush of pleasure to realize that... maybe this really did make her look sexy.

Susan looked back to the short skirt, then to the scissors on the bed. The skirt was sexy, but it could be sexier. She sat down and cut another inch or two off the bottom, and one slit up the side, then tried it on. If her parents were home when she was wearing that, she couldn't bend over or even sit on the couch without crossing her legs, and even that motion was liable to show off her hopefully just-fucked pussy. As long as they didn't and it was just Keith, that worked well... but the ensemble still needed something. Not a leash and collar this time, Mom might notice if it was disturbed, but something else.

She saw a pair of tights that had come out in her rummaging. She couldn't wear that as it was... it would completely defeat the purpose of wearing no underwear. But since she was already cutting up her old wardrobe, maybe she could wear it like stockings... she remembered one night, her and Dana visiting their friend Sonia's house, where Sonia's older sister let them hang out with her while she got ready for a "hot date," as she described it. She wore thigh high stockings under a skirt and said that guys really liked it even more than bare legs, like Dana thought would be sexier. Susan wasn't sure if it was always true, but it made sense that some guys found it hot, and maybe Keith was one of those guys. He told her to wear something sexy rather than just be naked, after all.

Snip snip, and where one pair of tights once was, she now had two stockings and something that maybe one day she could turn into something else. When she tried them on, she realized the cut wasn't even, one was longer than the other, but she heard her brother calling, "Man, what the hell's taking you so long?" and she decided against correcting the problem, and just went downstairs.

There, her brother was on the couch, tossing the vibrator her mother gave her in the air and then catching it. She hadn't even realized he had it... he must have gone into her room while she was in the shower, though she couldn't guess why. When he saw her out of the corner of his eye, he gave her a once over and said, "Not bad."

Not bad?! What a jerk. She destroyed three different pieces of her old clothes and all he could give her was a "not bad." "Is it hot enough for you?"

"It'll do, I guess. Maybe some lipstick and eyeshadow or something would really make the whore look pop." She thought about makeup, but aside from the simplest stuff she'd need to borrow from Mom, and it was too hard to wash off right away if she needed to change in a hurry. Suddenly, her brother took a second look, eyes focusing on the tube top, and widened in recognition. "Jesus, is that that old shirt I got you? Pretty deep cut, turning treasured childhood memories into something to get me hard." She shrugged, not entirely sure if that was a compliment or an insult, until he smiled. "I like it."

She smiled too, relaxing a little, and he patted the couch beside him. She rushed to join him, where he'd been as good as his word to Mom and had the Sunday Morning Megachurch broadcast on, although muted. He said he'd make sure she watched it, but apparently didn't care to listen to a sermon any more than she did. Instead, he tossed the vibrator up in the air and caught it a few more times. "So, I've been thinking about this little toy of yours."

"What, you want to put it up YOUR ass while we fuck this time?" It came out with more of an angry bite than she'd expected... she was still sore at him describing her hot outfit as "Not bad."

A sour expression crossed his face at the suggestion. "No," he said. "I was thinking about the writing on it. I mean, this thing cleans itself now. I've been doing all my writing on you, but there's so much more we could be doing."

"Like what?"

He tossed the vibrator to her, and she caught it instinctively. "Put it inside you." Susan started to turn it it over, looking for new marks, but he said, "Don't look at it, it'll spoil the surprise."

She leaned backwards into the couch, sliding her butt towards the edge of the cushion, then feeding it to her hungry ass as far as it would go. Now it resisted at a certain point, like her butthole sucked onto it and wouldn't give up any ground in on direction. "You want me to turn it on?" she asked.

"No, take your hands away." She did. "Now... abracadabra!" She tensed up automatically, but nothing happened. "No? Well, how about 'alaka... zoom?'" The moment he finished the word 'zoom' the wand in her ass began shaking with full force, sending waves of pleasure through her body. Except something was different. There was none of the usual buzzing sound that usually accompanied the motion... when it was buried in her ass the noise was usually muffled, but she could still always hear it... now, though, it was like he put a silencer on it.

There was no silencer on her, so she let out an "Ahhhhh" as her butt squeezed down on the vibrating rod to intensify the sensations.

"Okay, that's enough," he said, and the vibrator instantly stopped. She slowly pulled it out and read the new words. These were written very small, and must have been done very carefully. "Silently vibrates at full intensity when Keith says 'Zoom,'" it said, and below that, "Stops when Keith says 'Enough.'" "I figure I could have some fun with this. Maybe we will go to Church one of these days, with that in your ass. Wouldn't that be fun?"

"I'd rather just use it at home," she said, but enjoyed some of the possibilities. She could keep it in her ass and he could control it while fucking her, activating it and deactivating it and so never quite knowing when the pleasure came. That could push her much faster into a needed orgasm, she figured... if she was allowed one.

"Other things we could do, too," he said. "It made my bed more comfortable. I could probably go around the house fixing things. Make sure, I don't know, the shower always has hot water."

She grimaced. "Don't do that, it might make it so you can't make it colder." The urge to remind him to think things through was strong, but she fought it down... it might only make him angrier. And it wasn't a bad idea if applied right.

"Okay, bad example. But... check this out." He stood up, went to the TV, the marker in his hand from where he'd been holding it between one leg and the couch cushion, and began to write, and this time read aloud. "Unscrambles All Cable Signals." He lay the side of the pen against his chin and thought. "Wait, maybe I should put it on the cable box?" He shrugged. "Couldn't hurt to do both," and wrote the same thing, then returned to the couch and started flipping through channels, and soon the screen was filled with an image of a redheaded teenager kneeling between the naked legs of an older woman with dark hair and an open robe, while a man rubbed his erection, watching the seemingly inevitable lesbian act. "See, we definitely couldn't get THIS before." Susan stared at it in surprise, wondering what Mom or Dad would think if they stumbled upon it. Probably assume it was a glitch, but would they call the company and complain? "You like that, do you?" Keith said, misinterpreting her deep thought for fascination, and unmuted the TV.

"If you want to be our babysitter," the older woman said. "You've got to learn to eat pussy. It's nothing to be scared of. Here, look." She grabbed the teen by her red hair and pulled her in, mashing the younger girl's face in her open, wet pussy. "There, now use your tongue, if you want my husband to fuck your virgin ass."

Keith nudged her. "Look, she's still got a virgin ass. What a noob."

"So we can watch anything now?" she asked.

"Sure. But not this morning." She shot him a glance, and he said, "You're watching the church service, remember?" He lifted the remote and put them back to where they were before, only now with sound, a white-haired man in glasses and a long robe droning on about Jesus. Keith lowered the volume, not quite muting it but putting it to a level that the words were only barely distinguishable if everything else was quiet and you were really paying attention. "Come on, snuggle up with me," he said, and Susan looked at him with hopeful surprise. Snuggle? Was he just in a more affectionate mood, or was the jerk part wearing away. No, she realized as she slid up against her brother's side, it was too soon for that. It felt like forever, like they'd gone through so much, but it had only been a couple days. It should be at least a week before he stopped being a jerk, at least unless a mark became less powerful as it faded.

When she was close, her brother guided her to lie more on his lap, and then ran one hand lazily up and down her body, sliding under the shirt, pinching one nipple, and then down to her skirt. "Any good ideas for things you want to change around the house?" he asked. "If I like one, I might do it."

"I don't know," she said, trying to think of something good, though his finger digging its way inside of her, now that it had dipped underneath her micro-mini skirt and found no underwear in the way, made it hard to think at her best.

"No? Come on, you're supposed to be the smart one. Maybe I should refuse to let you cum until you come up with one idea I like. Get some motivated thinking working here."

The finger inside her was motivating her to get wet but not to think, but she had to try, her eyes roaming first around the living room for things that could be improved. Nothing jumped out at her, so she looked towards the kitchen, which she couldn't actually see from her spot on the couch, but she looked in the direction. "Maybe something with the stove?" she suggested. "So it won't overcook anything?"

"I won't overcook anything," he said, sounding offended even though his cooking skills were themselves magical. "I don't need a magic stove. And what I tried with the fridge didn't work."

"What did you try?"

"'Bigger on the Inside'" he said. "Thought maybe I could fit more stuff in there, but I guess it has to obey the laws of physics. At least mostly."

"Maybe you could make it use less power, or, like, clean itself."

"What do I care? Mom cleans that." Okay, so he was still a jerk. "And if you're worried about energy efficiency I'm clearly not doing very good work." His finger jiggled inside her with sudden, frantic energy.

She squirmed in response, her head grinding against his cock, which was slightly hard. He seemed to get off on teasing her... maybe that was the secret, to try and think like him, suggest the kind of thing he might do on his own. The vibrator he could control excited him, doing things right under the noses of their parents seemed to be something he couldn't help doing, even if it got them in danger, and he also seemed to like the idea of turning Mom on. "You could make Mom's underwear vibrate whenever you say hello..." she suggested.

It wasn't very creative, almost just combining the first two ideas to come to mind, but he stopped moving his finger, which despite the fact that she wanted more, not less, was a good sign, he was thinking about it. "Oh, that could be fun. But it would be a lot of writing, I'd have to get all of her underwear to have any real fun with it. Might be easier to go another way.... still, I liked the thinking behind it." The finger retreated, and even the hand slapped away, though it swatted her gently on the butt. "Okay, I think that's earned you a ride."

She already scrambled up into a seated position, waiting only to see if he'd direct her into a certain position. But he seemed content to stay seated and lounging back, and he did say "ride", so Susan realized he must want her on top. Well, that was pretty fun too, especially if she had permission to cum, instead of just being something for him to thrust into until he was done, it became a game of making him cum by riding him in just the right way.

She straddled his hips, facing him, intimate enough to kiss. "No, turn around," he says. "You're going to miss the sermon."

A whimper of frustration escaped her... she liked being face to face, when he might slip out of his control and kiss her, but she knew better than to argue, and spun in place, settling back against his crotch. Behind her butt, she could feel his hands working to free his cock, and she lifted slightly to give him freer access, and perhaps to offer him his choice of pussy or ass as he guided himself upright and towards whichever dripping hole he wanted.

The head poked against her pussy, and, steadying herself with one hand on his knee, she used the other to help guide him inside as she slid down, feeling the wonderful feeling of sliding down on him, feeling him fill her with part of himself until they were just about the closet two people could be intertwined with each other. If they were kissing it would be even closer, but that wasn't in the cards from this position, so she settled for what she had, and began a slow rhythmic rising and falling, not fast enough to be called a bounce, though she knew before too long she would be.

One of Keith's hands wrapped around her torso to slip under the shirt and play with the nipple on the other side of her body, squeezing it between the knuckles of two fingers. The other, she saw from the corner of the eye, was raising the remote control and pointing it to the TV.

Hoping he was going to turn it to the porn, she looked, only to see he was turning up the volume. The sound of applause rose like a wave, and even though she knew it was because of something the preacher said, or maybe celebrating a choir performance, it felt like it was for her, and she picked up her pace.

The camera focused on the preacher's face, a little sweaty under the hot lights, and now with the volume up, she could hear him clearly. It sounded practically like shouting at her. "So how are you in your passion for God? Are you lukewarm? Are you just going through the motions? Or are you red hot for God because He loves..." Here, Keith must have pressed the 'previous channel' button, because it went silent for half a second and then there was that redheaded babysitter getting fucked up the ass while the woman watched from the sidelines, and the older woman was in the middle of saying, "...a fucking slut!" The channel switched back, and the preacher continued, as though he really had just said 'God loves a fucking slut.' "Has there ever been a time in your life when you were closer to God than you are right now?" Susan wasn't sure. "If so why? Nobody's holding you back. The truth is you're as close to God as you choose to be. You can have as much of God as you want. You can be as passionate about God as you want. And if you're not it's your fault." Another channel switch and the redheaded girl was shouting, "Oh God, oh God..."

"Oh God," Susan said too.

As he flipped it back to the sermon, Keith whispered, "You can take as much of me as you want, can't you?"

"Uh huh," she said, but it wasn't true, not really... she could take as much of his cock right now as she wanted, but eventually he'd lose interest again and she'd be stuck waiting. That was why it was important to cum whenever she could...

The realization struck her like a brotherly cock sliding balls deep into her pussy, or maybe it just happened to be on a down bounce that it occurred to her. She didn't technically have permission to cum. He'd said she could have a ride, but that wasn't enough, and she was so horny that if she made him cum and he didn't get her fuck toy orgasm out of the deal, she'd be frustrated for who knew how long. "Can I please cum?" she asked.

"Man, Suze, you really are a sex fiend, watching a church sermon and all you can think about is cumming on your brother's cock." It was his usual brotherly teasing voice, so she responded with a wordless grunt of agreement. "You want to cum then?" Again she made the sound. "You can always beg God for an orgasm," he suggested. "Or maybe you could beg me? Which do you think would work better?"

Somehow she thought it was some sick jerky test to get her to choose him over God, but... at this point, hadn't she already? Incest was against the bible, sex before marriage was against the bible, sodomy was against the bible even if you're straight, according to one of the religious girls in her class. And Susan was never the most religious person, so if it was a test, it was an easy one. The TV preacher was still talking loudly, but she completely tuned him out and spoke solely to her brother, the one she knew was responsible for her ultimate happiness. "Please, Keith. I need to cum... I need to cum so bad, I'm so horny, and you're so good inside of me, and I need it so bad..."

"Oh my God!" the shout seemed to fill the living room, but it didn't come from Susan, or Keith, or even the TV. It came from their mother, standing at the first place between the door and the living room with a clear view of the indelible sight of her two children fucking on the living room couch.

***
Chapter Eighteen:

Their mother's mouth hung widely open, staring at the two of them. "I can't believe you would do something like this! Stop this instant!" But Susan had already... her brother's cock was still inside her, she'd sank down far enough that only his balls were visible, and the very bottom of his shaft where it was splitting her open. Uselessly, she tried to pull down the shortened skirt she was wearing to cover it, but with the legs all the way spread and the way she'd fallen backwards onto Keith, the best she could do was cover the top half of her mound. "For the love of God, get off him! You... you can't be doing this, it's... it's sick!"

Keith was the first to move, lifting her gently off his cock, which slipped back against his belly in a wet slap. "Mom, it's no big deal."

Mom continued to stare, but not as Susan anymore, now she was staring at Keith's dick, at least until she forcibly closed her eyes and aimed her head in another direction. "I don't want to hear it. Just give me one fucking minute." And with that, she shuffled with an awkward, legs-pressed-together gait, towards the downstairs bathroom and closed the door.

The two siblings exchanged a look, and Keith actually looked guilty and a little scared, for the first time in a long while. Susan, for her part, was sad, shocked, dreading whatever came next, and feeling horribly exposed. Her makeshift tube top was over one nipple, and she rapidly corrected it before her mother got back, as well as crossing her legs, as though there was some way of hiding what had happened.

But there wasn't... Mom was so pissed off that she actually swore. Maybe the only thing they could do was spare Dad the image... wait, where was Dad? Lingering outside, unaware what his children had been doing?

"I'll fix this, Susan," Keith said, like a promise, but she didn't think it was a promise he could keep, at least not without making a lot of things worse. They'd changed everything.

She buried her face as she heard the door... not the front door, but the one to the bathroom, where Mom had rushed like her life depended on it. Now relieved of whatever pressure drove that flight, she walked slowly, deliberately, and although Susan wouldn't look she heard anger in every footfall. Then silence, but silence from Mom standing right in front of her, silence before the storm.

At virtually the same moment, Susan started to look up, hands still covering her face and peeking through gaps in her fingers, and Mom snapped into motion, grabbing her by the wrist and pulling it violently away. "Look at me, Susan. This is serious. How could you do this to Keith?"

"What?" she said, but what she really meant was "Me?"

"You know damn well what. Seducing your own brother?! While we're at church no less? If I hadn't had to rush home to use the bathroom I..."

"Why'd you have to rush home to use the bathroom?"

Mom seemed thrown off by the irrelevant question, and Susan was surprised she'd even asked it, but it just seemed odd that she'd come home so early. Was that why Dad wasn't home? "I couldn't use the bathrooms at Church, they were just..." Mom shook her head. "No, you know what, this... this..." she waved one finger around, encircling the whole area of her view of where they'd been having sex. "...is what's disgusting. There's no excuse for that kind of behavior, Susan!" Mom now spared a glance for Susan's brother, her older brother, sitting right beside her and, in any rational universe, the one mostly to blame for all of this. "I don't blame you," she said, because of course she still had complete faith in her son, despite catching him fucking her daughter. "I mean, you should have refused but obviously your sister was determined to make this happen one way or another."

Knowing it was useless, she protested, "I didn't!"

"Look what you're wearing! I'm not an idiot!" She shook her head angrily, and Susan looked down again, not to check out her clothes, which she knew look slutty, but just because she couldn't meet her mother's eye. She know that made her look guilty but also realized that Mom would believe Susan started it no matter what. Even if she was tied up and screaming, Mom would probably ask what she'd done to provoke him raping her. "You know what, just go to your room while I decide what to do about you!" The pointing finger, still up from her previous gesture, now aimed towards the stairs. When she didn't start moving immediately, Mom's voice raised. "Go, you little whore!"

That got her running, up the stairs and into her room where she closed the door behind her, crashed on her bed, and began crying into her pillow. Mom thought she was a little whore, now... even if she managed to steal Keith's marker this minute and get rid of it, that would never go away. Dad would probably find out too as soon as he got home. Life as she'd known it before was over, it would never be the same.

"Susan! Get down here!" It had seemed like hours since Mom had sent her upstairs and she'd been lost in misery and dread for the future, but it had actually only been twenty minutes, which might have been even worse. It meant Mom would still be freshly mad. "And wear something decent!" She wasn't sure she knew what that meant anymore, but stripped off the cut-down skirt, tube top, and makeshift stockings and replaced them with a pair of grey sweatpants and a pink t-shirt with a cartoon image of a kitten playing with yarn on it, hoping that maybe it would remind Mom that she was still a little girl even if she was no longer a virgin.

Now looking less like the fuck toy she was, Susan slunk down the stairs, eyes downcast, waiting for the proverbial other shoe to drop. Her mother waited, hands on hips, still standing in the middle of the living room. Keith, he was more relaxed, a smirk painting his face and lounging easily on one side of the couch. Mom snapped her fingers and pointed to the couch, and Susan sat hunched forward with her hands on her knees, her stomach roiling with anticipation.

"I want you to know that I find your behavior completely intolerable, Susan." Oh no... it was worse than anger, it was one of her "I'm so disappointed in you" type speeches. But to Susan's surprise, it didn't go there like she expected. "But it's more important to decide how we're going to move forward." Now she risked looking up. Move forward? "That doesn't mean you're going to get let off on punishment... I haven't decided what it is yet, but in this house bad behavior is punished... even if we've decided to keep this from your father."

The heavy storm in her chest subsided, a little. Mom was going to keep this all a secret? Keith's doing, no doubt. "We are?"

"This would just kill him," she explained. "And besides, he wouldn't understand. And yes, you may not believe me, but I do understand, it just doesn't excuse things. So you are getting punished as soon as I can think of one. I'd let Keith spank you again, except I think you'd get off on it. I probably should have noticed that last time, maybe that was my fault, but I thought you'd have a little more self-control, but obviously I was wrong." Mom was starting to ramble, as she often did when she got flustered, and instead of looking directly at Susan, she paced back and forth, only looking at her when she changed direction. "Obviously your sex drive is far more intense than I thought it was. I thought that vibrator would be enough, but from what your brother tells me you've been coming on to him for a while and if that's the case... well... tell me the truth, Susan, have you had sex with anyone else?"

"No..." she said, not expecting to be believed, but her mother nodded.

"That's what Keith said, but he might not know. And when I say sex I mean anything dirty... has anyone ever touched your privates, or made you touch theirs? You'd better tell me now, you won't get any more trouble."

"Just Keith," she said.

"Good. We need to keep it that way. I will not have my daughter be the neighborhood slut... I can understand having urges, but you're too young for a sexual relationship."

What she didn't say was "How are you going to stop me, Mom? I'm super-horny all the time, thanks to Keith, and I'm addicted to cum, thanks to Keith. If I can't have sex, I'm going to die." She didn't say it because she knew she was still going to have sex, Keith was too much of a jerk to want to go without sex just because it wasn't allowed... otherwise they never would have started. They'd just keep it secret, she thought, do it when Mom wasn't there and at best she could delude herself into believing that her daughter was no longer having sex with her anyone, but...

"That's why your brother's going to take care of all your sexual needs from now on."

Susan's eyes blinked several times in rapid succession, trying to figure out if she just heard what she thought she heard, or anything else Mom might have said that she just imagined. "What?"

"He generously offered, and convinced me that this is the best option to deal with the shi... the bad situation that you put us all in, Susan."

"So you want me to... keep having sex with Keith?"

"No, Susan, of course I don't WANT you to. It's disgusting and immoral but since you seem determined to be ruled by your libido, I don't think you've really left us with any other choice but to allow it. Under a few conditions."

"Tell her the conditions, Mom," Keith said. Susan shot a look in his direction and he looked totally self-assured, like this was something he'd planned all along. Did he? she wondered. Had he written something on her to make her come home early today?

As she tried to remember which marks she already knew about, Mom laid out the conditions. "First and foremost, this stays between us three. No one else knows, not even your father. If he ever finds out... and God forbid, if you ever try to seduce him like you seduced poor Keith, I'm shipping you off to some private boarding school or some Christian tough-love boot camp. Understood?" Susan nodded. "Same goes if I find out you've slept around with someone else. I don't want you passing your brother any diseases because he wasn't enough for you. You keep it at home, you keep it discreet, and you keep it to him, you understand?" Another nod from Susan. "And for the love of God, the last thing I need is a knocked-up twelve-year-old to worry about, so he's not allowed to finish inside of you. At least, not where he could get you pregnant."

As long as Susan had 'infertile' written on her back, that meant every hole was still technically allowed, although maybe they'd have to hide it and pretend to be careful.

Her mother continued, "Also, this is a two-way street. If your brother has needs, you take care of them too, even if you're not in the mood. You can consider that part of your punishment." Did it really count as a punishment if it was something she was already doing and enjoyed?

"Knowing her, that's not much of a punishment," Keith said, reading her mind and putting a jerky twist on it.

"I know, but I'm trying my best here. I'd ground her, but that'd just mean she'd spend all day with you." She let out a weary sigh. "Your father's the most important thing. If he's home, no hanky panky, at least not unless I say it's okay. I'll try to call you from now on when we're on the way home so there's no more unpleasant surprises like today." She let out one more sigh, then raised her thumb and forefingers to her temple like she had a headache and added, "This is a messed up situation and I can't believe I'm doing this, but this is where we are. But understand... this is rock bottom, Susan. This isn't a free pass for bad behavior, it's... it's..." She struggled for an analogy. "Like when we gave you that extra reading tutorial program to help in school. An accommodation for your special needs until you don't need it any more." The tutorials had only lasted a couple months... the problem hadn't gone away, not completely, but she'd far grown better at handling it. Maybe Mom expected the same here, and if she could get rid of the marker and everything went back to normal in a few months she'd assume her plan worked. "And I expect you to do better from now on, because if you use this as an excuse to keep misbehaving... well, you won't like what I'll have to do. Get it?"

Susan nodded hurriedly. She still didn't like that Mom knew, but if she was willing to let it go on and hide it from Dad... it was the best outcome she could think of. It still filled her with shame, but at least she could shut the shame away when she wasn't using it.

Keith raised his hand, like that were in class. "What, Keith?"

"You... kinda interrupted us before we finished. Do you mind if we get back to it?"

***
Chapter Nineteen:

Mom's eyes rolled upward, like Keith was asking to borrow money she knew he'd never pay back instead of asking his mom if he could finish having sex with his little sister. "Fine, just... do it in your room. I don't need to see it."

A smirk followed, along with a shrug. "You can if you want... I'm not shy. And how else will you know we've been following all the rules?" Susan buried her face in her hands again. That was just what she needed, her Mom watching and directing when and where her brother could cum in her.

She looked like she was tempted, but shook her head. "I trust you, Keith. And I have no idea when your father's coming back."

Upstairs, in her brother's room, Susan had a pout on her face, even as she undressed and a part of her was craving Keith being inside her again, bringing her to the orgasm she still needed. Keith's casual attitude seemed to make it even worse, and instead of hiding her feelings she let her pout deepen into a thoroughly grumpy expression when she noticed he still had a smirk on his face. She wanted him to know she was mad. "What?" he finally said. "I thought that went rather well."

"We got caught. Just like I said we might."

"And I took care of it. Just like I said I would." She let out a frustrated noise, almost a growl... that wasn't intentional, it was one thing to let him know she was upset, but she didn't want him to feel attacked and choose to do something mean in return. But he was infuriating in his smug self-assurance that everything was under control. To her surprise, though, he seemed to soften, the smirk vanishing. "Look, I know we agreed to keep it a secret, but, this was an accident. You wanted to cum, remember? You practically begged me for sex. How was I supposed to know she'd come home?"

"Maybe if you'd thought things through sometimes..." Though maybe it was unfair. Susan only realized it after it had happened too.

"What's that supposed to mean?"

"This was your fault." Of course, he was the one who turned her into his super-horny fuck toy who was addicted to cum, but she didn't mean that. Because he was the one who turned him into a jerk, and that might have been the only reason he wrote all those things in the first place. So it was her fault, ultimately... but at least this particular circumstance, Mom's sudden unexpected return home to use the bathroom, that she knew she could blame Keith for.

He didn't seem to agree. Or he simply hadn't connected the dots. "My fault?" Now he was starting to sound defensive.

"What you wrote on Mom. That she can't undress outside of home? Why do you think she couldn't use the bathroom at church? Do you really think they were that dirty?" The same thing had happened the day before, shopping, Mom had rushed to the bathroom immediately upon their return home... she must have been holding it in. Somehow, undressing just enough to use the bathroom, even if nothing was completely removed, was also forbidden. Technically, it was also his fault because he put the television volume so loud that they didn't hear Mom enter, but this was the more important point.
"Shit..." The injured outrage at the accusation was replaced, for one moment, by a flash of a guilty expression, before that too disappeared and the smug jerky smirk was back. "Yeah, you might be right about that. My bad. I'll fix that tonight so she won't be racing home from work tomorrow. Don't want her to get fired... and besides, I have plans for tomorrow." Plans? That didn't bode well, but before she could ask, he said, "Tell you what, I'll make it up to you, you're allowed to cum all you want tonight."

Susan's anger didn't evaporate, but that was pretty good deal... all night covered not just this time but also when they shared a bed, if that was still going to happen, and even if it didn't, she could masturbate and still lose her horniness long enough to sleep. Unless he changed his mind... she didn't know if he could revoke permission if he changed his mind later... a perverse part of her wanted to test it, and maybe that was part of the reason she pushed and said, "You just gotta be more careful with what you write." The other reason she said it was because she really believed it.

"Yeah, yeah. Why do you think I haven't written anything new on you even though you said I could? I haven't forgotten that, you know. Now do you want to get fucked, or not?"

They were both naked now, and Keith was hard... far harder than she'd have expected considering she was giving him a hard time. But she certainly couldn't say no... or at least, if she did, she was pretty sure her cocksucker urge would take over and she'd be on her knees anyway. She wasn't close enough that it became compulsory, but it seemed like she had to be on that cock one way and so she wanted an orgasm along with it. "Yeah."

"So say it."

"I want to get fucked," she repeated, and crawled on his bed.

"That's a good little fuck toy." He got into position behind her, the head of his penis up against her slippery wet pussy, and slowly pushed forward. Once he was halfway inside her, he said, "Now since Mom already knows we're fucking... you might as well be a loud little fuck toy, too. Let's make her hear how much you enjoy it."

As a fuck toy, Susan didn't seem to have much choice in the matter, and so a series of moans escaped her lips as he thrust into her. She didn't want Mom to hear her, but what she wanted didn't matter, his suggestions might as well have been commands. At first it was just wordless cries, with the occasional "Oh, god, yes!" type outburst, but that wasn't enough for her brother.

He leaned forward, his belly slid across her back as he whispered, "You think she's masturbating to this right now?" Susan hadn't thought about it... it was hard to picture her Mom masturbating. She didn't get a chance to answer, because he continued, "Come on, let's make her really jealous... scream about how much you love my cock."

She was already in the middle of an "Oh god," so she just finished it with, "I love your cock so much! It's so big and thick and warm!" She took a breath, and then continued, "It feels so good, I know it's going to make me cum so hard! It makes me want to be your slut, your dirty little slut for life."

He pressed into her with a grunt, and wetness flooded inside of her as a screaming orgasm took over her brain, a fuck toy orgasm triggered by her brother, but it was just as good as one of her own, except making her throat raw from exertion.

Susan was just starting to come down from it, feeling her brother start to soften which meant that the fuck was over and so, with it, the fuck toy rules, when a frantic knocking on the door grabbed her attention. "Your father will be home any minute, cut it out now or put a gag in! Remember what I said!"

"Okay, Mom, we'll stop," Keith said and pulled out of her. His cock continued to dribble a stream of milky cum, but it was the last dregs, and Susan fell over on her side to start to lick it up. It was a good thing Mom didn't come in or she'd have seen they were already breaking the rules about where he could cum... or at least, breaking what she thought were the rules. It's not like they could explain it was a loophole.

"Then get yourselves dressed and presentable," Mom said, and they could hear her stomping downstairs.

"So, how long you think she was listening at the door before she yelled in?" Keith asked, pulling his boxers up.

"She wouldn't do that." She sucked some of his cum off her finger and went back for more, practically fingering herself, not out of a particular arousal but to make sure to swallow it all as quickly as possible. "Not everyone's a pervert like you."

"Sure they are. Some just bury it deeper. Or need a little push. Remember everything you're willing to do when you got a little horny? Well, everyone gets horny."

It seemed pointless to argue that some of that was because of things he wrote, how he changed her, with the magic marker... especially because he had a point. Some of it came from the marker, but horniness made her think of things that were perverted and far outside of anything he wrote. Maybe everyone really was a pervert inside, and they just wore a disguise most of the time.

Once she'd gotten all the cum she thought she could easily get, she got back into hers, the same normal clothes she'd chosen after Mom caught her, and then, since Keith was back at his drawing desk, she slipped out. She stopped at the railing and peered over when she heard faint voices and recognized one as her father, and listened in.

"Oh, it was just great," he said sarcastically. "Learned more than I ever wanted to know about riding mowers. You want to tell me why you ran out of there and left me to get a ride home from Fat Jimmy, the landscaping distributor? This whole church thing was your idea, you know."

"I told you, I had to use the bathroom! The ladies room there was disgusting, I couldn't even take my clothes off in there!" Susan nodded in smug satisfaction... she was right, for all the good it did her.

"Oh, please! Come on, tell me the truth. What, did you see some ex-lover or something?" Sometimes Dad had joked about Mom being unfaithful, like that one or the other of them might have been the mailman's kid... this time, it didn't seem like a joke, there was a bitter, angry tinge to it.

"It was the truth. I had to go to the bathroom. Ask the kids. Ask them later, though, they're probably busy."

"Jesus... have you been drinking?"

A harsh clinking sound, like someone had slammed a glass, not hard enough to break, but hard enough to make their anger clear. "Look, don't judge me, you wouldn't believe the day I've had."

"Yeah, right, you went through so much in the few hours between when we left for your stupid church idea and now."

"You wouldn't believe me if I told you."

"Where are the kids?"

"Upstairs... screwing around, probably." This was followed with a short, bitter laugh, and then she said, "Forget it. Don't bother them."

"I'm more worried about you bothering them. What are they going to think if they see you down here, drunk?"

"I'm not drunk, asshole! I just had a little to calm my nerves. I'm totally okay."

She heard a weary sigh. "Look, just, do me a favor, if you're going to drag me to something and want to bail halfway through, at least take me with you? They kept pressuring me to join some volunteer committee. I think it may have been a cult, I don't know." That sounded a bit more like her father's normal, joking mood. "So are we putting a pin in this church idea or we going again next week?"

"I don't know. Maybe this family doesn't belong in a church."

"Uh oh. What did Susan do now?" Susan's heart fell.

"Nothing. Well, not nothing, she's been a handful, but... I handled it, okay. Let's just leave it at that."

She slunk away and went to her room. Her own mother thought she was hellbound and not worth saving. That stung more than anything else.

***
Chapter Twenty:

By dinner their family seemed completely normal, although now Susan had to wonder if 'normal' had always been a set of lies. Because just before they sat down to eat, her mother pressed her vibrator into her hand and whispered, "This was sticking out of the couch cushions... be more careful with it!" And she ran upstairs with it in her hand to put it back in her room, only to run into her brother, who saw it sticking out of her pocket, grabbed it, and suggested she wear it in her ass during dinner. When she returned downstairs, it sticking partly out of her butt but safely covered by her pants, she overheard an exchange where her mother asked for help to set the table, and her father, sitting on the couch watching TV, said, snottily, "By help, you mean we start to do it together and then you leave me to do the rest on my own? I'll pass, I'm sure you can handle it." Later, when doling out the food, Mom seemed to use an excessive amount of force putting it on Dad's plate... but then everything settled down while they ate.

That they could sit down and pretend to be a normal family after all that, when Keith and Susan were fucking all the time, and now Mom knew it and was helping her hide it, Mom and Dad were mad at each other and probably Susan as well (but probably not Keith, who was having fun working the word 'zoom' into conversations and activating a silent vibrator inside of her, which she herself had to hide)... it seemed crazy, but they did it, and so maybe they were lying at previous dinners too. Maybe Mom and Dad always hated each other but pretended to get along for her sake. Maybe they didn't even like her, either, just got along because they were family and it was expected. Maybe Keith always lusted after her and wanted a fuck toy little sister... that lie she wouldn't mind, but she didn't want to give up the honest brotherly love that she hoped went along with it.

Still, she played her part and ate dinner, trying to sit still despite the fact that pleasant vibrations were rocking her body at unexpected moments and she technically still had permission to cum for the rest of the night, and her super-horniness had already crept in before her brother started secretly teasing her, drawing that line ever closer to a screaming orgasm while seated at a family dinner table. Nobody seemed to notice how close she was to that... if they did, that was pretending too. By the time she was done dinner, she was just about ready to burst with just a little more stimulation, but the vibrations had stopped, and she managed to ask politely to be excused, not saying that it was so she could rush up to her room and masturbate to some semblance of relief... but before she could stand she noticed a wet spot on the crotch of her pants from her dripping, needy pussy.

Keeping her hands awkwardly in front of the wet spot, Susan stood carefully, hoping she wasn't simply drawing more attention to it, then two steps away from the table she realized she couldn't even turn around to be safe from embarrassment, her ass lubricated too now when she got aroused, and she'd been sitting on it as her brother activated and deactivated it with verbal commands slipped into ordinary conversation. So she instead skipped unnaturally sideways from the table and out of the room, then when she was out of sight, started charging up the stairs.

"Geez, Suze, what's so important that you gotta zoom right up to your room?" At her brother said the magic word, 'zoom,' the vibrator silently activated and sent another unexpected blast of pleasure that sent her to her knees a few steps from the top, unable to risk completing the journey on rubbery legs, where she might trip and break her neck. She had to wait until her brother said 'enough' or she crossed the threshold.

He didn't say the word, so she lay there, just past the point where she'd be visible from downstairs, as she felt the orgasmic feeling cresting on her, her only thought, beyond a faint hope that her family wouldn't follow up the stairs, was that she keep quiet, and bit down on the step just above her, second from the top to either muffle the noise or remind her as her mind went blank with pleasure.

"You all right, sweetie?" Her father's voice sounded distant, but when she was coming down from an orgasm things sometimes seemed that way, like the her that saw and felt and heard was far away from her actual body, so when her brain had room for worry in it, she worried that he might be standing above her watching her writhe in pleasure.

He wasn't, everyone still sounded like they were at the dinner table, but they must have heard something, the worrying thump of something soft hitting the stairs, if nothing else, maybe a grunt that could have been pain or surprise. The concern was mild, though, distant, not like someone who'd heard the scream that went off in her brain. After all, they hadn't even gotten up to check.

"She probably just decided she hadn't had enough."

The vibrator stopped moving in her ass, which helped, but she still needed a few deep breaths before she said, "I'm fine," and pushed herself to a crawling position, and that way finished her journey up the stairs and used the railing to pull herself to her feet. She needed to get to her room and get those pants off.

When the knock at her door came, Susan was sucking absently on the crotch of her panties. Girlcum, her own juices, never quite satisfied her cum addiction the same way Keith's cum did, and this time around so much of it had been absorbed by the fabric that she felt it was worth a try to get all she could. It didn't taste especially pleasant, but it was mild enough that she could tune it out. By the time she heard the knock, she'd gotten just about all she thought she could get out of it though, and hurriedly took them out of her mouth and slipped them back over her legs, and pulled her shirt so that it covered everything. It was her room, she could get away with not wearing pants, she decided, but then pulled a handful of bedcovers over her just in case as she called out, "Come in."

Her mother's head poked through when the door was open just enough to admit it. "Your father's downstairs watching TV," she said. "I know you and your brother didn't get to... finish, again today. I saw how antsy you were at dinner... if you're willing to be super quiet, you can do it now before bed."

Susan stared in open-mouth surprise... because of what Keith had done, Mom seemed to accept their new sexual relationship... but still, she'd never expected that Mom would volunteer an opportunity, especially not with Dad home one floor below. Maybe her knowing wasn't such a bad thing after all. "I can be super quiet," she promised, and not mentioning the fact that she and Keith did, in fact, both cum just before Dad came home. But she wouldn't say no to another, nor did she expect Keith would. And it would be a chance to get some of the good cum.

"Okay, then come on." She gave a beckoning wave, then looked out as though expecting Dad to potentially be upstairs that very moment, and left the door open. Susan followed her out of the room and into Keith's. She must have filled him in on the plan, because he was already just in boxers.

Susan stepped into the room, standing near the chair to Keith's desk, and then looked at her mother, waiting for her to close the door and leave them alone.

"Well, what are you waiting for?" Mom whispered. "The moment your father's show ends, this stops, and I don't think that'd be fair to your brother after the last two times."

Gradually what Mom seemed to be getting at dawned on her. "...with you here?!"

"Of course with me here! Somebody with a level head has to watch out and make sure your father doesn't come up! Besides... I want to make sure he's not hurting you. Accidentally," she stressed, turning towards Keith with an apologetic look on her face. "I know you wouldn't on purpose, but if you're very big and she's so small, I just want to make sure."

Keith gave her one of his knowing, smug smirks. "It's fine by me," he said, then sat on the bed. "Why don't we do it with her on top again? That way you get a good look."

"Good idea," Mom agreed, and her eyes lingered on the bulge in his shorts, and seemed laser-focused when he pulled the waistband down and sprang free. She continued to watch as her own son gave his cock some preparatory strokes, and Susan was surprised to see Keith had a small squeeze bottle full of a clear-liquid that he squirted into his hand and rubbed on himself, leaving his dick glistening and slippery. Mom watched this too, then, seemingly reluctantly, turned to her daughter. "Now, remember what I said about being quiet."

"I promise," she said... she wasn't going to like Mom being there, but it was a small price to pay for a big piece of cock. She just hoped Keith would be sure to order her quiet once she was his fuck toy.

Mom had other ideas. "I wish I could rely on that, but history suggests I can't exactly trust you to control yourself. That's why you'll be gagged."

Right then, Susan might as well have been, for words didn't seem to want to come out of her open mouth for a few seconds. Finally, she managed, "It's in my room."

"No, this time we'll use mine." Mom stepped forward and bent down to retrieve something from the foot of Keith's bed, something Susan hadn't noticed. It looked like a belt, but with a red ball interrupting the middle of it. "Take off your clothes and I'll put it on you."

A few reluctant seconds later, Susan stood facing her brother, who was still lazily stroking himself with lube, while Mom tied the gag up behind her. The ball filled her mouth, making it difficult to talk, but it was just small enough to spit it out if it wasn't tied back. It was uncomfortable, but so was the knowledge that her mother was putting it on her. "Now, this isn't safe to use alone," she said. "Not unless I'm here, you understand?" Susan tried to respond but didn't see how the muffled grunt she made could be interpreted either as a 'yes' or a 'no.' She meant 'yes,', but how was Mom to know? Evidently, she took it on faith. "And if you have any trouble breathing, or if Keith starts to hurt you down there, just wave at me, okay?" She felt the strap cinch tight, and she gave a nod and another impossible-to-decipher sound. She thought of using the opportunity to say things she never would get away with, if understood, like telling Mom to 'F-off' and leave them alone, but resisted the urge... Mom had to have used these gags, maybe she learned gag-talk like it was another language.

Once the gag was on, Mom turned her around and guided her backwards by the shoulder, towards her brother's lap, advising her to spread her legs when she needed to, and for Keith to hold himself up. "Now, the ass is very stretchy, but if you go slow..."

"Actually, Ma," Keith said, interrupting her unnecessary tutorial. "Could you aim me for her pussy? We did anal earlier."

This gave Mom a moment's pause. "Are you sure? You won't be able to finish there."

"When I'm getting close we'll just take her off and finish the rest in her mouth. She won't mind that. Will you, Suze?" She shook her head, though now worried that Keith was going to use this to push the envelope even more, flood her pussy with cum and see if he could talk Mom into accepting that, too.

"Okay, as long as you're careful." And, to Susan's surprise, Mom bent down, reached between her legs to grab hold of Keith's cock and hold it upright as she gently guided Susan even further back, so far that she felt the mattress on the back of her legs. She looked down, Mom was still holding her own son's cock, proud and upright, and staring at it with what seemed like hunger... and Susan felt a rush of anger and jealousy. Mom shouldn't be touching him, even if it was just to help him use his little sister as a fuck toy. "Slowly," she said to Susan. "Start sinking down. I'll guide you in."

She lowered, slowly impaling herself on her brother's cock while Mom watched, transitioning into a crouch so she could see the full penetration. Whatever she'd given Keith to rub on his cock certainly made it smoother on the first entry, but before long Susan doubted she'd be able to tell the difference, she was getting wet from the pleasure alone.

Halfway down, Mom finally let go so Susan could sink the rest of the way, and shook her head in some wonderment. "Obviously somebody's been practicing with hairbrushes for a while," she said, then put her hands on her knees and watched, looking up as though to give Susan permission to start.

Whether or not that was the intent, Susan took it that way, rising and falling on him, only now with a ball gag to keep out any moans from her end from being audible more than a few feet away. Keith only made soft grunts, and Mom was dead silent, enraptured, but in her hands-on-her-knees couch, Susan noticed her legs moving together and apart rhythmically, like she was doing some exercise routine, thigh crunches, not in tune to the movements of her children having sex, but on its own, much slower speed, almost like she was doing her best not to but couldn't resist it either.

Mom didn't watch the whole way like that, but got up, went to the door and out, as though finally taking her lookout role seriously, but then, after satisfying herself that they weren't about to be caught, returned, and returned to watching from right in front of them. Susan was getting more and more convinced Mom wasn't interested in Susan's comfort or safety, or even watching the sex itself, but rather just getting a front row seat at the cock she'd been fantasizing about thanks to the magic marker. Susan was starting to feel like she was just someone who occasionally got in the way of Mom's view.

Sometimes Mom asked for status updates, from Keith, though, not from her, about whether he was getting close. Keith just answered with the vague "Not far now."

The only time, once the sex had started to full on riding, that Mom gave Susan any advice, it was to say, "It's okay to rub yourself too to get yourself there faster." She then demonstrated on herself, rubbing her hand roughly over her pussy, albeit through the sweat pants she now wore, and Susan was about eighty-percent sure that the whole reason for the advice was an excuse to touch herself in front of her two children fucking, or more accurately her son's cock while it was fucking some slut that happened to be her daughter.

Still, true or not, it was good advice, and Susan rubbed her mound with two pressing fingers, stroking around her clit as she rode faster, getting very close to another orgasm, struck by the feeling that she'd already be there if her mother watching everything didn't make the whole thing a little uncomfortable. Maybe she wouldn't be able to do it at all with Mom there, but she had to try, and so she tried to turn what was happening around in her head,, find a way to convince herself it was more hot, not less... plenty of things had seemed to make that change on their own, the thought of things entering her butt, the thought of her dad doing sexual stuff with her, the thought of everyone knowing her brother knocked her up... so what was the harm in one more? The act felt something like when she was writing a story and searching for just the right word, or metaphor, that would make everything just work, but before it happened, it was like groping around in the dark.

Before she could make that connection, she heard her brother beneath her, his hands had been gently on her butt, but now they pushed upward, not insistently, but steadily, and he said, "I think I'm just about to blow."

Mom sprang into action. "Get off, get off," she said in a panicked whisper as she rose and pulled Susan up under her arms, and with one heavy lift the young girl was free of the cock she craved and landed a few inches back on her brother's belly.

"Noooo," she tried to cry out, knowing that if he was outside of her when he came, she wouldn't get the fuck toy orgasm she was so used to, but with the soft rubbery ball it just came out as an unidentified gurgle that might even have been an orgasm.

"Shit," Mom said as one stream of faintly white but mostly transparent liquid bubbled off the head of Keith's cock. "No time to get her gag off." Susan watched as her mother held the shaft upright, then opened her mouth wide and enveloped the head with her lips.

***
Chapter Twenty-One:

Her Mom's lips didn't close around her brother's cock, though. Susan noticed it after a few seconds of fury, and of not being sure whether she was more made at Mom for preventing her fuck toy orgasm or stealing Keith away from her, somehow, but she did eventually notice that her mouth was abnormally wide and not actually sucking him, or even licking him. She was kneading her hand up and down like trying to massage the cum out of him, but her lips didn't actually seem to make contact, and tongue only accidentally grazed with motion, like she liked the taste of her son's cum but not his cock.

She did swallow a whole bunch of his cum, though. Mom milked his cock into her waiting mouth and kept swallowing as though she was the one addicted to cum. She wasn't as good at it as Susan was, though, and some of it slid off down her tongue and out her lips along with a stream of saliva.

Keith pushed Susan aside from her position on her brother's chest, turning her so that now her legs dangled over his body and he could get a better view, and she could see him too, staring at what Mom was doing, as wide-eyed as Susan felt but there was no jealousy on his face, or anything that looked upset. Susan found herself torn between watching her mother and her brother's face, and looked back and forth between them as they stared at each other like she wasn't there at all. Finally, Mom pulled away from the now dribbling cock, swallowed one more time for good measure, locked eyes with Susan and whispered, "Don't just stand there, Susan, get the gag off!"

Only with that instruction did Susan reach to the back of her head and try to undo the strap. She also slid backwards off of Keith's body and just on to his bed and glared at the two of them. "Wow," Keith said.

"I can't believe I did that."

"I can't believe you did that either."

"Me either," Susan tried to say, but the ball was still in her mouth and the strap was being stubborn... she was probably just pulling it the wrong way, but being at the back of her head it wasn't like she could look.

"It's not like I wanted to or anything!" Mom insisted. "It was just an emergency and I didn't want it to spray everywhere. I didn't even actually touch you... I mean except for my hand. But, anyway, I realize that this was not appropriate... if Susan had been more prepared..."

Finally, she got the strap off, maneuvered the ball out around her front teeth and out of her aching mouth, and whispered, "What the fuck?" Mom was going to try to blame THIS on her, too?

"Susan!" Her voice rose above a whisper for the first time, an angry reaction before she caught herself and continued in an angry whisper, "That sort of language is totally out of line from you. This is not an excuse to break all the rules. Now get over here and finish cleaning your brother like you should have before."

Susan rolled her eyes at the strange double standard in her mom's brain, where she practically yelled at her for swearing right before telling her to lick all the remaining cum off her brother's cock that she herself hadn't swallowed. But she was a cocksucker and even though she was far enough away that she could have resisted on her own, it seemed like when somebody told her to, she had to live up to the mark. She leaned over and took his messy cock inside of her mouth and began wiping it clean with her tongue. At least it was more comfortable than the ball gag, and there was still plenty of cum left for her, though whatever lube Mom gave Keith gave him a weird fruity taste.

She just wished her mom would leave her alone to suck it in peace. "Watch your teeth," she advised, uselessly, because Susan already knew to watch her teeth, and they weren't hurting him at all. "Guys can be very sensitive especially after."

She wanted to say that she knew, but it would mean taking her mouth off. Luckily, Keith stood up for her. "She's doing fine, don't worry."

Mom made a sound like she was mildly bothered but wasn't going to make a big deal out of it, and watched for a few more seconds, then asked, "You haven't done that with anyone else other than your brother, have you?" She shook her head, completely honestly, although it didn't look like her mother believed it. "Fast learner, I guess," was what she said, but her tone still suggested she had her doubts. "That's enough, now... you don't want to get him all hard again since you can't do anything until tomorrow, your father will be done his show soon."

Keith knew that she couldn't stop sucking on her own, so helpfully pushed her away and, while holding one hand on her forehead so she couldn't snap back on it, pulled his boxer over and hid it from view, freeing her from any compulsion except her horny desire to get him hard enough to fuck again. He'd gotten off, but she hadn't, and she was still aroused and seeking relief. Still, more than anything else, she didn't want Mom to be there watching... she'd rather masturbate in her room rather than that.

Now that Keith was no longer exposed, Mom got up again to look out the bedroom door and check once again that there was no danger of interruption, while Susan got dressed again. Finally, she left them alone, once they were both wearing clothes again. It wasn't exactly fully clothed, but at least it didn't look suspicious enough that it might cause Dad to suspect his two kids were in a perverted sexual relationship that their mother watched. Even before they found the magic marker Keith would sometimes walk around in just boxers, and Susan sometimes just had a long t-shirt over underwear. It only seemed dirty to people who already knew what was going on.

"That was really something, huh?" Keith said after Mom was downstairs. "Her finding out could be the best thing that's ever happened to us."

Susan's lips pouted automatically. "To you, maybe."

"Hey, you benefit too. If she hadn't run interference with Dad, you'd have been suffering until bed time."

"I'm still horny. Meanwhile, Mom practically sucked your cock like it was a lollypop, so I guess you got what you want."

Keith rubbed the back of his head, but the grin on his face was, for a chance, not smug, but rather guilty. "Yeah, she shouldn't have be able to do that. Just goes to show you that definitions matter."

"Huh?"

"I did make it she couldn't have any kind of sex with anyone but Dad." That was news to Susan... she thought the only thing he did to prevent that was make her unable to undress. "I guess that doesn't count as sex."

"But... it's called oral sex!"

"She didn't suck. She barely touched me, actually... it was weird. More like she was jacking me off into her open mouth." He shrugged. "I guess jacking someone off isn't sex, at least in her book." That thought seemed to capture his imagination for a moment. "I wonder if it's her definition that matters, or mine as the writer?"

"It's a definition," she said. "Doesn't it just mean what it means?" Then she pointed out, "I didn't know what a fuck toy was, I just know how it makes me act."

"Yeah, well, I wasn't sure what one was before I had one. And I guess my bed doesn't actually know what 'comfortable' means, you know?" He shrugged, as though losing interest. "Anyway, I guess if she didn't technically give me a blowjob, and she really didn't touch you at all, this doesn't technically count as my first threesome."

"Good. I don't exactly want to know I had a threesome with Mom." Dad, maybe. "Being your fuck toy is one thing, being with Mom... that's... ick."

"Yeah," he said, with a nervous chuckle, and then dismissed her, claiming he wanted to be alone for a while. As she walked to her room, she replayed the look he had on his face again and felt an anxious trembling in her stomach that he was just playing along, that even if Mom wasn't actually giving him a blowjob, the sight of her mouth around his cock during an orgasm had turned that from something he once thought as 'ick' to becoming hot, much like had happened in her own head with so many things. She prayed to a God she'd lost faith in that that wasn't what was happening... things were bad enough without having to share him with Mom.

Sleeping together that night turned out to be forbidden, again. Not that it was going to stop them, but after Susan emerged from her room, after masturbating out the orgasm Mom stole from her, Mom intercepted her on the way to the bathroom and made a point of telling her it wasn't allowed. "I just can't trust you, you could force your brother into something again and wake your father up. Not to mention that you might get pregnant if you don't get off him in time, like last time." Which was mildly insulting in the usual way, with Mom assuming that Keith had no fault in the matter.

Through gritted teeth, Susan said, "Fine," knowing that she'd sneak into his bed after Mom fell asleep.

"And you're grounded for the rest of the week. If you're old enough to... do what you're doing, you're old enough to stay home alone, so I'll tell your brother he doesn't have to watch you, but you're staying put. It's part of your punishment." Susan nodded, turning her head away so she could roll her eyes without being caught, and maybe looking guilty at the same time. "And I'm putting you on birth control pills soon... just to prevent accidents like almost happened tonight."

"Mom, that's not necessary..." Because of the mark on her, she couldn't get pregnant.

"Yes, it is. Now go brush your teeth." She lowered her voice and added, "And your little toy, too. I know you were using it."

It was infuriating that Mom could still make her blush and feel ashamed. The vibrator didn't need washing now that it magically cleaned itself, but she got it and took it into the bathroom with her just so Mom wouldn't nag.

Keith, as usual, thought it was funny, both the grounding and the vibrator incident when she brought it up, in bed, his arms around her holding her like an oversized teddy bear that he could also fuck. Which he had already done by that point, a leisurely incestuous ass-fuck just to work out any remaining tensions of the day. They were just starting to drift off to sleep after their mutual orgasm, when she thought of something and asked, "Did you make sure Mom could go to the bathroom tomorrow?"

"Shit." He pulled away, slipped out of her, and got up to get the marker out of the lockbox. "I'll just be a few minutes," indicating with a gesture that she should stay put. While that left her free to gather the cum that was now starting to drip out of her ass, she also got to worry about what other changes he might make while he was there. Maybe, her thoughts raced while she sucked her finger greedily, he's removing the 'no cheat' rule for Mom, or adding "or Keith" to the list of people she was allowed to have sex with, depending on how he worded it the first time. Or he could be going the other way, making Mom want to do lesbian stuff with her, or make her want Susan to get pregnant, or some other fucked-up change.

This time, Keith was true to his word, probably because he was too sleepy to get creative, or at least that was what she hoped when he returned after only something like a minute. Distractedly, he tossed the marker on the desk and climbed back into bed with a yawn.

His arm encircled her again, and Susan stopped her sucking, but unlike her brother, she was far from asleep, her heart was racing madly as she realized... he left the marker on the desk in a moment of sleepy inattention. He hadn't locked it away like he usually did.

This could be her only chance to get it for herself.

***
Chapter Twenty-Two:
She didn't move right away. First, because she worried it could have been a test, that he did that deliberately to see if she'd go for it. Next because she realized that even if it wasn't, she had to make sure he didn't know she had it, at least until she'd hid it, or used it, or did whatever she was going to do with it. Keith was so much bigger and stronger than her, if she grabbed it and woke him up in the process, he would just pry it out of her hands and punish her for the attempt. This was like one of those cartoons where someone had to sneak away without waking up the monster. A vague memory of something once watched flashed through her head, not even with pictures, more a faint idea. It involved someone... maybe a duck? Being held by something like a bear. To get him to turn over, she thought, the duck used a feather to tickle the side of his ear until the beast rolled over and away.

Now if only she could get a feather without waking Keith up.

Since that idea didn't seem feasible, as Keith's pillows weren't feather, she instead tried to plan what she'd do when she got her hands on the marker. Writing on Keith was out of the question. Unlike their parents, now, he wasn't a deep sleeper, and would probably wake up the moment the wet tip of the marker touched his skin. She could maybe write on herself, but couldn't think of anything that would help, except maybe super strength which might let her fight off her own brother if she needed to. She didn't want to, though, she realized. Maybe it was just the other marks on her body talking but she liked, sometimes, the feeling of being completely helpless in her brother's grasp, and didn't want to give it up, even for a week. It seemed crazy, even to her lying in bed, to be more worried about that losing that than losing her chance to get away from this crazy situation, and that made her ask the big question she'd been avoiding.

Did she even want to get away at all?

The temptation to just surrender, give up and let her brother make all the decisions of her life tugged at her soul, a part of her knowing it was similar to the feel of being physically under his power, a freedom from any responsibility. She wouldn't have to get out of bed at all, either just slip comfortably into sleep and be a happy fuck toy again in the morning.

Maybe she would have if it was just her, if her parents weren't under his spell too, and that thought made the horrible sight of her mother, mouth over his cock, flashed through her mind along with a warm rush of anger. No, she did have to get out of this.

She also decided it was probably best to hide or destroy the marker, rather than waste time giving herself strength. If she could sneak to the marker, she could sneak out the door, maybe long enough to write "stuck" on the door so Keith couldn't follow her. Then she could run, maybe to the kitchen, throw it down the garbage disposal, or down a sewer grate, or even just flush it down the toilet. She would like to keep it, but anywhere she hid it had to last for at least a week, so the marks could wear off, and Keith might punish her by not letting her cum, or drink his cum, until she told him where it was hidden. He might do that if she destroyed it, though. Maybe she could mail it to herself, if she didn't have only a vague idea of how non-electronic-mail worked.

It was as she was thinking about that, without even a good plan in place, that she felt her brother's arm slip away from her as he turned over on his back. He sometimes did that, usually only for a few minutes because it made him snore, and she elbowed him awake, but a few minutes would be all she needed. Her heart began racing again... it had calmed down some while she was planning, but now she'd have to make her move without a full plan in place.

She decided to wait until the first snore. That would prove he was asleep. It seemed to take forever, though, and when it finally came, it was a soft sound, almost like something being dragged steadily over gravel. It might as well have been an alarm to Susan, though, her eyes snapped open and she lifted her neck to look over his body in the dark. Carefully, slowly, she rose into a seated position, then crawled over to the foot of his bed. It seemed safer than climbing over his body. Another snore made her comfortable as she set her foot down on the ground. As her second foot landed and she shifted her weight to get off the bed, it made a faint creak that made her hold her breath. A half-minute later, she completed the move and stepped gingerly through his room towards the desk.

It was all going well until her foot landed on something crinkly.

She couldn't see it but somehow she just knew it was that damn Doritos bag Mom bought him the other day, that he probably casually dropped on his floor after he was done. If she didn't know him better, she'd have thought it was an evil mastermind move, a trap set to detect her moving around. The truth was, he was just a slob.

Her brother didn't move right away, and the thought she got away with it, but when she lifted her foot it crinkled again and she heard a soft voice, "What are you doing?"

"Going to the bathroom," she said, the first thing to come to mind, even though she was mid-step moving farther away from the door. Looking back, she saw her brother looking at her, not obviously suspicious, but definitely awake. It was obviously too much to hope that he'd asked the question and immediately went back to sleep.

"So go," he said, and she'd already committed to the lie, so she adjusted her course and started walking directly to the door, and into the hall, leaving the door open behind her. Since she didn't actually have to pee, she just walked down there and sat on the closed toilet for a minute, then washed her hands and returned to the room. Maybe, she told herself, he'd be asleep again.

That hope lasted until she was halfway between the bed and the desk and she noticed. The marker was now gone.

There was nothing else to do but slip back into bed with her brother, and now her heart was beating fast for a whole new reason... since he'd gotten up and moved it, he had to have guessed what she was trying, and she expected at any moment that he'd snuggle up, whisper in her ear, something like, "Nice try," or maybe "Bad girl," and, either way, find some way to punish her for the attempt. No such obvious sign came, he seemed to be content to sleep, and eventually, so did Susan, until it was time to get up again, and sneak back into her room at the crack of dawn. At that point she realized that her brother slept soundly right up to the moment she crossed into the hallway, and if she'd only waited, she could have grabbed the marker then.

Mentally kicking herself on her way to her room, she at least consoled herself with the thought that she'd escaped punishment for her attempt, that he'd forgotten. At least, she thought that until she found out his plans for that day.

Everything seemed normal in the morning, at least as normal as it got for them now. Mom grimaced when Dad advised them to "Have fun," before leaving for work, and seemed to glare at Susan with some kind of unspoken warning she couldn't be sure of but the only thing she could think of was something like 'make sure he doesn't cum inside your pussy.'

So, naturally, as soon as the car pulled away, she sat on the couch, pulled her long shirt up to expose her horny wet slit and asked her brother, "Want to fill up my pussy?" Now that she'd seen how flawed Mom was, the kind of poor judgment she showed even before Keith started writing on her... deliberately disobeying her was starting to become its own kind of fun.

"A little later, maybe," Keith said, but that didn't worry her, at least not right away, but she thought he might simply prefer to use another of her holes first. Then he ruined her morning by saying, "I'm going out for a bit."

Her face crumpled up in surprise. "What?" Why would you go out when you've got an eager fuck toy little sister at home? "Where?" Now she realized why he was fully dressed so early in the morning. Even Susan was still wearing just a long t-shirt.

"I thought maybe I'd go hang out with Nunya"

She thought he knew most of Keith's friends, didn't recall one named Nunya. Sounded Mexican or maybe Middle Eastern somehow. "Nunya?"

"Yeah, None-ya-business." He smirked at her, and she couldn't resist rolling her eyes. "I'm going out, that's all you need to know."

"Can I come with you?"

"You're grounded, remember? I'm not. Besides, you have to stay home just in case Mom runs home to use the bathroom again. I think I took care of it, but..." He finished off with a shrugging motion. "Don't worry, I'll be back before too long. Maybe even with a surprise."

"Fine, but... can you at least take care of me before you go?"

He seemed to mull it over, as he often did even when his mind was already made up. "No, I don't think I'll have time."

Her voice came out in a whine that was annoying and childish even to her ears. "But I'm horny!"

"And I want you to stay that way. That means no masturbating... well, no cumming. You can masturbate all you want, I guess. Consider it a lesson."

Her face froze. He still had a smile on his face, but now it seemed less teasing and more menacing. A lesson... that sounded like he was doing this because he saw her making a move for the magic marker last night, and he was going to leave her horny and craving cum for who knew how long. She'd almost prefer a new mark to that kind of torture... but without something to suggest immediately, that was just asking for trouble. "Okay," she said finally, and hung her head like a puppy who knew she'd done bad.

At least she didn't seem too upset over it, he even ran his hand over head, ruffling her hair in a goodbye. "Hey, at least you can watch whatever you want on TV, right?"

It was small comfort, but once he was gone she did go look at what was available, first getting a bowl of cereal and sitting with it between her legs on the couch, eating while flipping through channels, trying to take her mind off the lesson her brother was apparently teaching her.

Cartoons caught her attention first, some she'd never seen before because they were on channels ther parents never paid for, although none were interesting enough to watch for more than a few minutes. Some she only watched because she didn't want to change the channel while she was eating cereal. Once she was done with her breakfast, she got bored with cartoons, and wandered through more channels, but the anxious feeling in her lower torso seemed to draw her towards the channels that gave her a pulse of attraction every time she thought about them, even though she knew it would make her problem worse in the long run.

But finally she gave in anyway, and turned to the porn channels.

The first she landed on had a pigtailed blonde surrounded by naked men, all with huge cocks, and she seemed excited by the prospect, so much so that she started sucking on one, then the other, almost like she too had "cock sucker" written on her somewhere. Watching it made Susan thirsty, craving the cream she knew they contained, although the blonde didn't seem to spend enough time on any one to get it. And it seemed like some of the guys got impatient at that, for one grabbed her by the knees, from the front, and pulled her legs out, then one of the guys helped by grabbing and supporting one foot as she fell backwards, still sucking on whatever cock was pushed towards her face. But now that another hole was open, one pushed his thick cock in and began fucking, and it looked like another was trying to squeeze in below so he could use her ass.

The title, when she looked at the on-screen guide, was "College Coed Gets Gangbanged" and it was apparently a sequel, although Susan seemed to understand what was happening despite not having watched any of the previous installments in the series. She was getting treated like a fuck toy by a dozen men at once, guys who all seemed to get along and share and wait their turn.

That thought didn't get her masturbating... what did was the thought, "What if this is the surprise Keith mentioned?" Maybe he was going out to gather his circle of friends and invite them over to fuck his sister, thinking a sudden gangbang would be scary and an ideal punishment and reminder of what he could make her be with the marker. If he thought that, he didn't realize how horny she'd gotten, and the fingers of one hand started pressing the flesh of her mound, swirling it in place. Even though her brother's friends weren't as attractive as the guys in the movie, and probably didn't have cocks that big, she thought it could be pretty hot. The only way that might be a punishment is if he didn't let her cum.

The girl on screen seemed to not care about cumming, not like Susan did, she seemed to think of it like a game where it didn't matter if she got off as long as everyone else did. And everyone else did seem to... whenever one did she heard him moan and his movement would change and then he would swiftly be replaced by another guy in line. Before long, she was shiny with sweat and spit and cum and she still seemed to be smiling, and Susan didn't know if she had cum or not but that kind of attitude seemed like something to aspire to.

The movie ended with a group of them cumming on the girl's face while she licked up as much as she could, then smiling and winking at the camera. It didn't show how they treated her the next day, or whether she had to rush out to get cleaned up before her next class... that was apparently saved for the next in the College Coed Gets Gangbanged series, for it just faded to black and went to a short stream of credits.

She was going to try again to find something else to do, but the next movie up was "I Need My Stepdaddy's Thick Cock!" and that title spoke to her somehow, even though she didn't have a stepdaddy, so she watched as a dark-haired girl, apparently back from college break, stopped at home to talk to her stepfather, who she called "Daddy," a hunky older guy who walked around in only shorts. Within a few seconds of talking to him, she asked him a favor, told him that college had made her really horny but she didn't have a boyfriend to help her out, and asked if she could please get his help getting off.

That seemed to be all it took in the movie, asking, although he said "I don't know if it would be a good idea, your mother wouldn't like it," he pretty much just stood there while his stepdaughter got his cock out of his pants and it was already hard and before he could even finish his sentence she had it in her mouth.

The fucking came pretty soon after that, and Susan fingered herself along, wondering how realistic porn films were, whether that was really all it would take, even if it wasn't a stepdaddy but rather a real daddy. Mom wouldn't like it if she knew, but it seemed like it was almost as fun to disobey Mommy and keep big secrets from her as it might be to fuck Daddy.

Fucking Daddy would not be whatever surprise Keith brought. She knew that, but she played with her pussy imagining the idea anyway, right up through the scene and onto the next, in which two different girls were making out on the couch when a different stepfather emerged downstairs and caught them. They were shocked at first, but the one girl, his stepdaughter, said that she started playing around with girls in college, and begged him not to tell her Mom. The other girl suggested turning it into a threesome to keep it quiet. Susan watched that scene not as turned on, but still interested by the way both of the others went from saying it was wrong, to being okay with trying it if the other one was. She watched long enough to see the girl's face at the moment her stepdaddy's cock entered her, then changed the channel when her friend got on top of her and covered that. Threesomes seemed better to her when there were two guys.

Needing a break, Susan went upstairs and put some panties on, simple white ones with penguins doing various summer activities spaced out around it... she thought maybe that with something actually on her pussy she wouldn't be so tempted to touch it.

The idea didn't entirely work. With the underwear and without the porn channel on, she didn't masturbate as intently, but still found herself pulling the crotch aside and rubbing herself occasionally, mostly whenever she tried to think about what surprise might be brewing in Keith's mind. She just couldn't stop herself from making wild, and sometimes wildly hot, guesses.

It was likely to be some kind of punishment as well, but it might be a hot punishment, like the spanking. Maybe he went out to buy something humiliating, like when he walked her around like a dog.

She froze in the middle of rubbing her mound as a thought struck her. He didn't need to bring back anything to treat her like a dog, he could just get Mom's leash and collar again. But what if he actually brought a dog from somewhere? It was a sick, disgusting idea, but it wasn't the first time he'd brought it up to threaten her and, shamefully, it seemed to get less disgusting the more she thought of it. She resumed pressing the top of her slit and swirling as she tried to think if he'd actually do something like that, and what it would be like. It might not be so bad... a dog couldn't tell anyone. The most it could do is bite and scratch her while it filled her fuck toy cunt with doggy cum. Maybe Keith would even give his permission to cum at the same time, and laugh as she had an orgasm while a dog fucked her. Or maybe he'd just make her suck the doggy cock, put it in front of her and enjoy how she couldn't stop herself, because she was, after all, a cock sucker, and that was a cock. She couldn't picture the look of a doggy cock, just imagined the furry feel as it humped her face. And why not two dogs, if he could get one, one to suck and one to fuck? Maybe THAT was what he was doing, going door to door, telling people he was starting a dog walking service, then walk a whole bunch of male dogs to their front door.

God, I really need to cum, she thought with a wince and forced herself to pull her hand away from her dripping pussy. It kept wanting to go back, but she knew it was only going to make the problem worse, not better, until her brother came home. It just wasn't fair for him to leave her alone like this, needy. I should teach him a lesson, she thought, but knew it was a useless one because he had all the power. Rebellion in small ways was certainly possible, like destroying something he loved, but only if she was willing to pay more for it later, or if it was something only she knew she'd done. Still, thinking of things she could do for revenge helped keep her mind off her pussy for a little while.

One idea sent it right back, a delicious one, one she thought she might decide to try if he did this again... but no sooner had she gotten her finger wet he heard the door opening.

"Hey, Suze. You decent?"

Her brow furrowed at her brother's question. She was far more decent than he was, despite what she'd just been thinking about... although she also knew that usually when people asked that, they meant was she naked. But why would Keith ask... unless someone was with him?

Maybe he really had brought his friends over to gangfuck her.

But then, her already being naked would be a good thing, wouldn't it?

She wasn't sure, but she pulled the underwear back over her fuck toy hole and pulled her shirt down over it, verified that the shirt was long enough to cover all her marks, then looked down to check the neckline. If there was company, she needed to make sure you couldn't see she was a fuck toy. Maybe that's not what they wanted, maybe they just wanted time to hang out. That mark was only visible if she tugged her collar down, so she guessed she counted as decent unless they were turned on by a girl whose knees were visible. "I guess?" she called back.

Her brother stepped in, and behind him, she heard a giggle, and that's when her heart sank. Soon, they were visible, Keith first and then a blonde-haired girl only slightly shorter than him. She recognized her as the girl who worked the front desk at the pool, the day they found the marker. Right away, she could tell this girl, who knew him from school despite him being a year older, had a crush on him.

That was the punishment, she realized, designed to make her feel sorry she even tried to take the marker... and it worked. For nothing had made her sadder than the realization that he hadn't brought someone to play with her, he brought a replacement.

***
Chapter Twenty-Three:

She remembered the girl's name, or at least her first name. Tricia. Before Susan became her brother's fuck toy, she actually encouraged him to ask this other girl out. Now, the thought that he did was unsettling. That, the part of her brain that still wanted to be a writer pointed out, was irony.

Envy, too. She seemed to be everything Susan was not. Just a little shorter than Keith, her hair came down just past her chin with long side-swept bangs hanging down over her forehead, but instead of Susan's plain brown it was a beautiful golden blonde color. Where Susan had no chest to speak of, Trish had actual boobs that Susan could only dream of, and she looked like was trying very hard to show them off without looking like that's what she was doing. The girl wasn't wearing a low-cut top or anything that made cleavage, but her yellow shirt was awfully tight on her.

And, most of all, she was pretty. Dark blue eyes that seemed like huge attention getters, a completely clean complexion even without makeup, and a smile that lit up her whole face and didn't look fake at all. Maybe once, Susan would have thought that Trish's prettiness was mostly from confidence in herself, that Susan could be pretty too if she believed in herself, but now, seeing her enter the family home, wearing a smile that looked as distinctly nervous and unsure of herself as Susan often felt, she had to admit... the girl was just plain pretty in a way she could never hope to match.

"Hi!" Trish said, a chirp in her voice. "We met a couple weeks back, remember? At the pool?"

"I remember." She folded her arms over her chest and stared daggers at her brother. If he was going to make her suffer, he was at least going to know how unhappy she was. Maybe it would keep the punishment short. "What are you doing here?"

"Your brother invited me over." While Susan thought about how dumb it was to state such an obvious answer, she watched Trish look back to her brother with wide, worshipful eyes, like that really was answer enough, he asked, and of course she said yes. It was almost supernatural, and that was why Susan next looked over every exposed part of her body, trying to spot one of the telltale marks.

There was something dark on the palm of Trish's hand, but she couldn't make out what it said.

"Aren't you going to even say 'hi?'" Keith asked. "You don't want to be rude."

"Hi." She made the word as icy as she could without being outright rude like giving her a finger, and she even felt a little guilty for that. It wasn't Trish's fault, after all. "What's that on your hand?"

"Oh, it's nothing," she said, but she put it behind herself, hiding it like it most certainly was not nothing. As she made the motion, Susan saw a black mark peeking up from the bottom of her short shirt-sleeve. It was the edge of some letter, but he'd obviously done a number on her.

Keith caught Susan's eye, a glint like he knew what she saw, and didn't care if she knew or not, then spoke again, casually leaning on one of the walls. "Hey, Suze, why don't you go show Trish your room. I'll get started on lunch for us."

Again, their eyes met, and this time Susan read into them an encouragement to play along, backed up by a warning of all the things he could do to her if she didn't. "Fine." She started upstairs, and waved Trish to follow.

After Keith disappeared into the kitchen, Trish spoke. "So your brother really knows how to cook, huh?"

"It's a recent development." She started climbing the stairs, not even thinking that Trish could see up her shirt and to her underwear if she didn't follow as closely behind as she did.

Her mind must have been on other things. "I've never had a boyfriend make me lunch before."

Susan felt her face twitch. "Is that what he is? A boyfriend?" She looked behind her to see if Trish reacted, either to the question or how it came out. It felt like she'd just snapped at her.

If Trish noticed, it didn't show, she seemed nervously happy, especially as she spoke. "I don't know, maybe. We haven't really defined it. But I l... I really like him. And I hope we're going to be super-close as well."

Susan shrugged, then pushed through the door to her room. "Well, here it is," she said. Leaving unsaid, "You've seen it, you can go now."

"It's cute." Trish walked around the room like she was invited, checking out the decorations on the walls, the desk... and standing awfully close to the drawer where she kept the vibrator. She last left it sticking out of a sock inside the drawer, which itself was currently left partially open out of carelessness. It was hidden for now but easily visible if Trish was especially snoopy. "I have one those too!" Susan looked up but too late, she'd stopped pointing and, although Susan was pretty sure she wasn't looking in the drawer with her newest toy, she couldn't tell if Trish was referring to a certain toy, or pillow, the letters of her name spelled out on the wall, or one of the posters of inspirational sayings or favorite TV shows. She didn't care enough to ask, either, she'd already had too many things in common with the girl, she didn't want to know that, say, they were both big fans of Once Upon a Time. She didn't want any reason to talk to her any more than necessary. Trish pivoted suddenly and sat on the bed. "Why don't you come sit beside me?"

Susan shuffled, her feet, but went did just that, thinking she could get a better look at whatever was on Trish's hand.

"So... this is awkward..."

Finally something Susan could agree with, without bad feelings. "Yeah."

"Okay, so..." Trish hesitated again, and Susan looked up from her still-closed hand and noticed the blush on her face, but didn't think much of it and tried to get a glimpse of the writing again. "Your brother mentioned that... uhm... you know, that you're growing into a woman..." Wait, what? Susan's eyes snapped back up, although Trish was looking away. "And well... he said that you needed another girl, to, you know, show you about masturbating and stuff." Now Trish looked back, although she flinched at the sudden, unexpected eye-contact, just for a moment. "It's totally natural to have this kind of curiosity."

Susan now felt her face was just as red as Trish's. "Yeah, well, you shouldn't believe everything my brother tells you."

"Of course I should," she says. "He wouldn't lie to me. I completely trust him."

"Oh, fuck." It slipped out, but she supposed it didn't really matter. It probably didn't matter how polite or rude she was to this girl anymore, all that mattered was what Keith had told her.

"There's no need to be embarrassed, Susan. I wish I had someone to show me things like this when I was your age. I mean, I was more curious about boys than girls, but..."

"Wait, did my brother say I was curious about girls?"

"He said he thought you might be bisexual and he wanted you to have a chance to explore those fantasies, safely. So, we thought if I showed you how to masturbate, it'd also let you feel what it was like to be touched by a girl, and, you know, if you want to learn how to touch one, too, that's okay. In fact, it if would make you feel better, I can take off my clothes and you can look me over up close, instead of, you know, stealing peeks in the change rooms and everything."

Susan squinted. "You'd do that? Just get naked right here?"

She smiled. "Of course. Do you want me to?"

Susan did, but not because she was attracted to Trish, or any girl... but if Trish was naked, then she'd be able to see what marks her brother had placed on her. Better to know what she was dealing with. "Okay, go ahead, then."

Once given permission, there didn't seem to be much sign of shyness except for the faint blush still on Trish's face. She stood and moved in front of Susan, then crossed her hands in front of the bottom of her yellow top and pulled upward over her head in one smooth motion despite how tight it was. Then she immediately bent down and pulled down her white bootcut pants.

This left Trish completely naked, at least from the ankles up, which was a surprise, but it made sense once she read the marks on her body, the marks that were now much more visible. She concentrated on these rather than the nudity, of which there wasn't anything that interesting... sure, she took a look, out of curiosity. The breasts she was envious of before seemed even more perfect than they were under clothes... not as large as Mom's maybe but standing out proudly and perky and with nipples that seemed to naturally stand out into points. Her pussy wasn't anything interesting, just a fleshy mound split by wrinkled a triangle of pink at the bottom that concealed the hole that must be there... above that, it was bare, Susan noticed... she shaved, but that didn't seem to be too surprising, since she worked at a pool and probably didn't want anything that might show through a suit.

After that cursory glance, Susan focused on her real interest, the words that were scrawled in random places around body. There were not as many as she expected... none on the obvious, to her, places that her brother might choose to show his domination, like right above her pussy or breasts, but there was one on her belly, one on her lower leg, and another on her shoulder that she could see from the front, and of course, the one on her hand still curled up. The belly one, the only one she could clearly read so far, said, "Likes dirty things written on her," which probably explained the rest being there... it also suggested that she could see them, that unlike her parents, Trish knew what was on her. So she read that one aloud.

"Yeah," Trish said, seeming to have rediscovered embarrassment. Nudity didn't bother her, but this did... maybe it was because she didn't understand this new fact about herself that didn't fit with anything else she believed about herself. "I guess I do. Your brother convinced me to try it, and it was weirdly fun, you know?" She grinned suddenly, like finding a kindred spirit. "Well, I guess you do. Your brother tells me you write dirty stuff on yourself, too."

Not exactly... she hadn't written anything on herself. But contradicting whatever Keith told her didn't seem like it'd do any good... it might make her mad... or worse, him. Let Trish see for herself, and notice that the handwriting that said "Fuck toy" is the same as the one that wrote on her own body. "Let me see," she said, and reached for Trish's arm, tugging her closer, opening it. "In love with Keith" it said, with a little heart drawn beside it. "I bet this was the first one he wrote," she said.

"Yeah, how'd you know?" She pulled it away, looked at it, then grinned. "Oh, right, because it's on my hand, of course. I can't believe he knew, though. I guess I was more obvious than I thought... but luckily, he likes me too!"

Trish's gushing made bile rush up in Susan's throat. Since she already held her hand, Susan used it to turn her and better look at the one on her shoulder. "Trusts Keith completely," was there, as she expected, and she rolled her eyes. "Turn around?"

Trish complied, and there Susan saw far more writing. "I know, we kind of got carried away with it," she said, sounding almost regretful. "It was so much fun, but... I was hoping to try to apply for a junior lifeguard position, but now I'm stuck at the front desk until this goes away. I can't even go swimming with this!" She pointed to her leg, which read, "Bisexual."

Susan could almost picture how it went down, that Keith started on the hand, then convinced her to let him write on her shoulder, and then since she trusted him completely, she let him write on a few other places that would be covered by a one-piece swimsuit. Maybe the "Likes dirty things written on her" came next, to make it easier. At some point, he wrote on her lower back, like a tramp stamp, "Hates Wearing Underwear" which, if her own experiences with the marker were any indication, probably led to her getting out of her bra and panties as soon as practical, maybe even while Keith watched. Of course, she wouldn't think anything of doing that... she loved him and trusted him completely, after all, so it didn't matter if he saw her naked. And then he was free to write anywhere he wanted, legs, all over her back, on her butt-cheek.

"Wants to eat out younger girls" was on that butt-cheek, and she wondered if Trish even knew what was in store for her. Other marks on her back were, "Cums on command," "Kinky," and, one they had in common, "Super Horny," although Trish had hers higher up on her back. "Great at oral sex" was another, and Susan suppressed a pang of jealousy because she just knew her brother had tried that one already, while she was home alone all horny and helpless. That was supposed to be her cum, she was the addict, not Trish.

"So, go ahead, you can touch anything you want," Trish offered, turning around again to show off her front, and maybe because that was where she wanted to be touched now that she was kinky and super horny. Susan didn't particularly want to touch, even though she herself was super-horny, girls just didn't really interest her... maybe Keith would change that, maybe she'd get a matching "Bisexual" mark, and the thought of that weirdly sent more of a pulse of arousal bigger than any that came at the thought of touching Trish.

She knew Trish was waiting though, and so she reached out and touched her breast, the only part she was at all curious about... she didn't have boobs of her own, and her friends that did, had never offered the chance to touch, at least not feel, bare, for more than a fleeting second. But then, she'd never asked either... Dana probably would have let her, if she asked, and she was the one who she just poked briefly when they were changing and Susan dared to voice her curiosity. Other than that, the closest she came to feeling boobs were clothed hugs, and she did have a little bit of curiosity of exactly what it would feel like when she had her own, to squeeze and move around. Now she had a demonstration model, why not take advantage of it?

They were squishier than she expected, with firmness beneath but bulged around her fingers and without seeming pain. Trish did let out a gasp, but Susan knew it was the same kind of gasp she herself gave when something felt far better than she was ready for... sometimes there was pain involved in situations like that too, like when something entered her ass, but she knew Trish liked the touch. That alone made her withdraw it.

"Here, why don't you take off your clothes?" Trish suggested, and then without waiting for her answer, reached down for Susan's shirt and began pulling upwards. "Then I can show you some good ways to touch yourself." Not fighting had been a habit so ingrained in Susan that she didn't even resist, just lifted her arms and let her top be removed. Once it was out of the way, Trish took a step back and stared at the word just above her own nipples. "Fuck toy? Wow, that's a good one. Did you write that because that's how you want to be treated?"

I didn't write it at all, you stupid bimbo, she yelled, but only inside her head. Outside, she shrugged, wondering at how stupid the marker made Trish that she didn't recognize it was Keith's hand-writing, or realize that the words would be hard for Susan to write herself, even looking in a mirror. Would Trish still think she wrote it when she saw words in places she couldn't even reach?

"There's nothing wrong with dirty fantasies you know. Everyone has them! I mean, I've got some whoppers!" Trish fell to her knees in front of Susan, looking up at her past her naked chest, and with one finger tugged on the strap of her underwear, though not yet pulling it down, just out. "That's the best way to learn to masturbate, you know... just think of something crazy hot and, you know, have fun with it. Here, let me show you."

She wanted to say no, but if she did, she knew she might get her own 'bisexual' brand. Maybe even beyond that... she could see her brother adding "Pussy Licker" to "Cock Sucker" and making Susan unable to resist licking another girl if she saw her naked. Cooperation might not be fun but it might at least keep her, her. "Fine. Just get it over with."

Trish took that half-hearted permission as though it was all she needed to hear, and pulled down the penguin-print underwear, and lifting Susan's legs off the floor with the last few tugs to remove them completely. Once they were free, Trish tossed them aside and returned to a spot between the legs, only a few nose-lengths away from Susan's own pussy. She stared at it hungrily, then her eyes slid askance and she smirked. It was visible before, but she must have just noticed. "'Cock Sucker,'" she read aloud. "Nice."

"Not really," Susan said, almost wanting to add, "It's a pain in the ass when you can't stop it," but she didn't. Spoiling Trish's image of her might be fun... even cluing her in to the fact that the marks couldn't be resisted could be entertaining, but it was fun she knew she'd be paying for.

"Okay, now, masturbation is real simple, you just touch yourself in a way that feels good. Like this!" Trish's finger was out, and Susan expected it to be rubbed along the side, or maybe inserted, which meant she wasn't prepared for when Trish's mouth closed the gap and a wiggling wet tongue slithered up along her crack.

***
Chapter Twenty-Four:

The unexpected intensity of a tongue inside of her made Susan press her body back into the bed, arching her belly up and practically thrusting her mound into Trish's face. So much for pretending it did nothing for her. After letting out half the breath she'd involuntarily sucked in, she pointed out, "I don't think that's masturbation."

Trish's mouth pulled back long enough to say, "Well, you never know, you're pretty flexible." She leaned in again and sent the wiggling wet muscle tunneling into her hole, then came up for air again and added, "You might be able to lick yourself. Worth a try, anyway." With that, she went back to tonguing Susan's preteen pussy, and Susan could practically feel the smile on the older girl's face as she did what the marker told her she wanted to.

Maybe she should ask Keith to just write "likes getting her pussy eaten by girls," she thought, only to have to admit to herself, with uncomfortable arousal, that she did like it. It just felt good, even if she wasn't especially into girls, and even if it didn't feel as good as being held down and used as her brother's fuck toy, she could feel her pussy... her hot, wet horny cunt--the term bursting into her consciousness as Trish nibbled on her clit--responding, getting warmer, wetter, hornier, and her butt twitching with anxious energy and probably producing its own lube. She also knew if this kept up, she'd cum soon from lesbian sex... at least if she had permission.

Right when Susan started to consider begging for permission, Trish pulled back. "Where's your bathroom?"

Susan's breaths were coming out like panting, and so she didn't speak, just pointed in the direction it would be down the hall.

Trish stood up and, still naked, went for the door. "I'll be right back. In the meantime, why don't you see if you can lick yourself. I used to be able to but I can't anymore. My boobs get in the way."

That was interesting... Keith might have made Trish be kinky, but that had to be something she did before he even wrote on her. Maybe there was a kinky part of everyone.

Experimentally, Susan lifted her legs and pulled them as far as she could, using her arms when they were close enough to pull them behind her head and reached her head down, trying her hardest to make contact with her tongue and her pussy, like she'd done before while trying to feed her cum addiction as a dog unable to use her hands, but since letting it drip out on its own wasn't an option, she gave it more of a determined effort. Straining and stretching, she could just make the tip of her tongue touch herself... it couldn't get very deep and it wouldn't be useful for drinking cum out of herself, but... it might be fun to get fucked in this position. She imagined her brother going back and forth between each of her holes in a series of thrusts and where his cum went being a matter of luck. Maybe she'd suggest it sometime, revisit the idea of making her flexible with the marker.

Trish reappeared at the doorframe, a sly grin on her face at Susan's pretzel-like pose. "See, there you go, that's pretty good. But if you really want to bring your masturbation game to the next level ,you need a little something extra." She lifted her hand, revealing a dark blue and white toothbrush with a handle swollen enough to accommodate batteries. A very familiar toothbrush.

"That's my dad's."

She seemed viciously amused, and Susan wondered if Keith had told her about the cucumber somehow. "So? He'll never know. And it makes it more fun. Look, I'll show you, this is going to change your whole world."

On the one hand, Susan wanted to say, "No, it won't you stupid bitch, I've already got a real vibrator and I'm also my brother's personal fuck toy." On the other hand, she was super-horny and wanted to cum, so she held her tongue and played dumb.

She began to move her arms out of the way so her legs could descend back into the same position they were before, but Trish said, "No, stay like that," and she reversed herself and watched from up close as Trish got into position and then flicked it on. The brush came to life with a faint buzz, not even as loud as her vibrator, and Susan looked on, almost bored... at least until Trish did something she never expected.

This wasn't the first toothbrush Susan had used for to pleasure herself. However, she used the handle of her non-vibrating toothbrush, usually in her ass. She assumed this would be the same way, a much thicker handle, inserted, and the vibrations would be pleasant but not even very strong as all because most of the vibrating was done with the head. Maybe, she might insert the head itself, or use the back of it like a wand on her sensitive lips.

Somehow she never considered applying the brush directly on and around her sensitive aroused clit. A pained gasp broke out of her otherwise impassive facade, but it wasn't all pain, there was a lot of pleasure as well... the pain was almost merely pleasure too intense for her to process. Although the vibration wasn't as powerful as her own toy, the feeling of the bristles was almost like multiple mini vibrators working in concert.

Trish didn't leave it pressed against her full force... that probably would have made it more painful than not, it was just short, intense bursts broken up with her sliding it on other areas of her slit, gathering her moisture, liquid that she imagined soaking into the bristles and remaining there when her father brushed his teeth the next morning. First the cucumber, now this... how much did Daddy have to taste of her before he might as well just lick her himself?

That thought was probably the worst moment for Trish to add her own tongue to the mix, while the tooth brush bristles played on her clit again, because in Susan's mind it became Daddy's tongue, using his toothbrush on her, and the thought was getting her off... or would be, if she had permission to actually cum instead of just riding close. When was Keith going to show up and put her out of her misery.

After a third source of stimulation was added to the mix, Trish's finger, inserting itself into her pussy hole, she couldn't take any more and said in words themselves shaken up by raggedy breaths, "I need to... I need... I need to..." But she couldn't, and so completing the sentence seemed to lose its importance. She twitched as she bounced up against the imaginary wall in her head between her and orgasm but couldn't breach it.

At least, not until Trish pulled her tongue off her dribbling slit long enough to say the magic words, "Go ahead, cum you little whore." Just like that, an explosion took down the wall, consumed everything, her soul escaped her body in what felt like a thousand directions, every available exit, and then all came rushing back.

When she regained the muscular control to open her eyes and look back between her legs, she saw Trish with one eye partly closed in a half wince and her face dripping wet. "Did I... pee on you?" she asked, her face turning scarlet at the thought. She could vaguely remember, in the moment, feeling a pressure down there that wasn't usually there.

"I don't think so..." but the way Trish emphasized 'think' proved how unsure she was. "I never took you for a squirter, though."

"It's never happened like that before!"

"It's okay," she said. Although her dad's vibrating toothbrush had been turned to the off position sometime during the orgasm, Trish now casually ran the brush head along her pussy like she was gathering up as much liquid as she could with it. "I mean you're not that experienced yet."

How much more was there to learn? Susan wondered.

Trish lay the toothbrush aside, and began licking again, softly, and avoiding the clit like she knew it was still a little raw right now, but she still wanted to lick underage pussy and one was in front of her. Susan watched, no longer super horny, still enjoying the sensation but also a little jealous that Trish was taking the girlcum that could be used to sate her addiction. For the first time she considered kissing Trish, a big long tongue kiss, not out of any romance, but just to get what she needed.

"Are you doing lesbian stuff with my little sister?" Keith was there, suddenly, at the open door. His face was stern, cold.

Trish immediately straightened up. "No! I wasn't! I was just doing like we discussed, showing her how to masturbate!" Genuine panic showed on her face, of a girl caught in the act and knowing it, the desolation of someone who just realized they might have pissed off somebody they loved in a way that might not be fixable.

Keith's face relaxed. "Too bad. That would have been fucking hot."

It took a second, but the anxiety on Trish's face vanished, replaced by a sultry, experienced look marred only by the red blush that hadn't quite had time to fade away. "In that case, I was totally eating out your little slut of a sister." She took another long lick, tongue fully extended as though for show, and flicking even across her clit a few times at the end. "You see all the filthy stuff she's written on herself?"

"I saw," Keith said, ignoring Susan's frown at him. He could at least take responsibility, it wasn't like Trish was going to stop loving him!

"Maybe if it's what she wants so badly," Trish said, looking up at Susan over her mound. "We should show her what it's like to be treated like one."

"I'm game if you are," Keith said, also glancing over to Susan, almost as though he was asking her permission but of course he wasn't. "But lunch is ready... and it's better while it's hot."

Lunch was some kind of spicy shrimp with lime on a bed of garlicy noodles. Susan didn't even know they'd bought shrimp. Or lime, for that matter. He'd never gone all out like that before when it was just the two of them, clearly he was trying to impress somebody. It all tasted pretty good, but watching Trish fawning all over her brother's cooking and making googly-eyes at him every other moment almost made Susan want to puke. "This is like really good. You should be like, on Masterchef."

"I've thought about trying out for it," Keith said. "I'm sure I could win it."

"I know you could. I'm going to have to watch myself around you though, or I might get fat."

"I don't think you'll have to worry about that," Susan said with a grumble. She meant because the Marker could make her stay thin forever or have any other body type he desired, but Trish smiled like it was a genuine compliment, with a hint of insincerity because it was from the person she wasn't fishing from.

"Thank you, Fucktoy." Trish had started calling her that since they got dressed to come downstairs and each lunch, something Keith insisted on in case somebody came by unexpectedly. He insisted they dress, not that his new girlfriend call Susan 'Fucktoy,' that is. That, she did on her own, although Keith's evident smile the first time she did it probably cemented it as well as an order would. Like every other assault on her dignity, Susan did her best to ignore it... acting upset would only make it worse, with one jerk and one person in love with and desperate to impress the jerk.
She was starting to rethink that tactic... so far, it had gotten her brother to do more and more perverted things... which was fun, but now he was spending time with another girl entirely and brought her home and let her do whatever she wanted. Maybe, she started to think, this would be a good time to not be passive, to get angry.
She had just about made up her mind to try, to think up a good comeback for the next time Trish called her a fuck toy, when it happened. "Can you put my plate in the sink for me, Fucktoy?" Trish asked sweetly, holding it up and shooting a self-satisfied smirk in Keith's direction.

Susan had nothing, no clever reply ready, so she just pressed her lips together quietly and promised herself that next time, she would say something, as she reached for the plate.

Only to be surprised when Keith actually defended her. Sort of. "You keep throwing that word around, but you're not much better, are you?" Trish's face fell like she'd been punched in the gut and tears started to well up at the bottom of her eyes. "At least, that's how you'd like me to treat you, isn't it?" She responded with an ashamed nod. "Say it."

"I want you to treat me like a worthless fuck toy."

If anything Trish seemed less sad at saying it, like she now thought of it as part of a game, a kinky game she was very much into. That should have dimmed the quiet satisfaction Susan got from her brother sticking up for her, but it didn't. It didn't really matter to her that Trish probably enjoyed what was developing now, after that first moment of panic, what mattered was that Keith seemed to sense what was bothering Susan and acted on it... maybe her 'just go along with it' plan was good after all. Still, the words popped out of her mouth, "Maybe you should write it on her."

Instantly she regretted it, because Trish perked up. "Yes, go ahead," and Susan remembered that she liked having dirty things written on her. And Susan realized she wanted to be Keith's only fuck toy. The mere fact that Trish was there was making her jealous and annoyed, and she wanted to tell her brother... except for how well not saying anything had worked lately. Maybe if she played along he might sense it bothered her and change in a way he couldn't if she asked, because he was a jerk.

"No," Keith said after a moment's thought, giving her hope that her plan was working. "I think she needs to earn being a fuck toy." His eyes slid to hers and suggested, "Tell me what you want me to do to you. Be specific. Make me hard and maybe your wish'll come true."

Now Trish was fully into the game. She thought for a moment, a stupid grin on her face, then came up with, "I want you to fuck me without a condom till you squirt while I lick your little sister's baby cunt."

***
Chapter Twenty-Five:

Susan was disgusted. That hardly showed any imagination at all! Trish clearly didn't have the mind of a writer, because even with "kinky" written on her body and soul her suggestion was hardly dirty at all. "I want you to fuck me without a condom till you squirt while I lick your little sister's baby cunt," was amateur hour. "Baby cunt" was a nice touch at the end, but if Trish wanted to impress Keith, Susan thought, she should have suggested something like, "I want you to tie me up in the public park and stick your cock in my ass while your sister and I tongue-fuck each other and threaten that if I don't make both of you cum before a minute is up you'll let the mangy stray mutt watching us rape me while you record it on your phone and send it to the whole school and my parents."

The thought of that scene, or scenes, made Susan unconsciously squeeze her thighs together a few times and she could feel herself getting wetter, which briefly worried her. It was one thing to get horny from her brother doing stuff to her, but imagining Trish used and publicly humiliated was somehow almost as arousing. Did that make her a jerk too, deep down? Maybe even worse than Keith, because she didn't need to it written on her.

The line of thought was cut short by Keith's assessment of Trish's fuck toy application speech, given after an exaggerated show of thinking about it, tilting his head, making expressions like he was a judge weighing a complex legal argument. Finally, he said, "You know... I'm not sure that's enough to earn your place as an official fuck toy... but that doesn't mean we can't give it a try." His eyes cast downward, around the table, plates and crumpled napkins, then up again and smirked at Trish. "Might as well start your training with the soft stuff. Clear the table for us. Get it spic and span and you may get a reward."

Trish complied, after a moment of slack-jawed astonishment that she was being told by her new love to do the same kind of chores she probably did at home. But once she accepted it as part of the game, she sprang into action, taking all of their plates and putting them in the sink, then coming back with a wet cloth to wipe away any extra crumbs. Susan wondered if Keith would ask her to wash the dishes too, hoped even, but was disappointed.

He slapped, then patted, the top of the now clean table and looked at Susan. "Hop up here."

Eager to show herself a more compliant fuck toy than Trish could ever be, she didn't even hesitate, using Trish's vacant chair as a stepping stone and then sliding over. She knew the table could support her, despite Mom yelling at her when she tried it, though she actually rarely used it as a seat (except to disprove Mom's theory that it would tip over). The kitchen counter made a more interesting place to sit when she wasn't using the chairs... at least before. Now that she was a fuck toy, she realized that they would be harder to fuck on, while the table was just the right height for Keith to be able to slide his cock into her. On the slightly-higher counter, he'd probably have to stand on his tiptoes. That made the table now a far superior seat. It also seemed like the only reason to sit on it at all, and she hoped Keith was going to fuck her in front of Trish, make her feel a little of what Susan herself was going through. Excited by that possibility, her hands went to her the pink shorts she now had on and gave Keith a questioning look.

"Not yet," he said, then looked to Trish. "See? My little sister's better at being a fuck toy than you. You didn't even offer to get naked to clear the table." That was, Susan decided, probably the reason he had them get dressed for lunch in the first place, because it was fun for him to demand they strip at his command.

It was jerky of him, and of Susan to enjoy the panicked desperation in Trish's face when she said, "I'm sorry, I'll do it now." She whipped off her top again so quickly that her breasts jiggled for seconds afterwards, then bent down to undo her pants again, and stayed bent once she was naked, wiggling her butt towards Keith. "Want to show your little sister what real sex looks like?"

"What makes you think she doesn't already know?" At that, Trish flashed an uncertain grin, the kind you give something that you're not entirely sure is a joke but are hoping it is, and Susan realized that Trish still hadn't caught on to her being Keith's fuck toy. Maybe it was her love for him and perfect trust, or maybe incest was just a little too weird for her to believe it, even as kinky as Trish was now. Susan really hoped Keith was about to prove her wrong, and smiled smugly in her direction to strike a blow at her confidence.

It didn't seem to work, Trish's forehead just crinkled up slightly, like she was trying to figure out whether she believed it or how she should feel about it, but finally she said, "Well, she's never seen you fuck me."

"True, true. And I've never seen a live lezzie scene. Well, unless you count Louise and Rachel making out in the cafeteria." One corner of his lips quirked up at the thought or some idea spawned by it, but then he dismissed it. At least he didn't mention whatever you'd call what Susan did with their sleeping Mom at his command, which probably didn't count even if it was much dirtier than a makeout. "So why don't you help my little sister get naked and we'll all learn a little something." Susan started to pull at the bottom of her shirt, but Keith stopped her with a firm look. "No, let her do it."

The naked blonde-haired teen stepped between Susan's legs and leaned in, stopping momentarily to shake her ass in Keith's direction and whisper in Susan's ear, "Your brother's going to fuck me so hard," then pulled up on Susan's shirt.

Susan grimaced at the words but remained compliant, raising her arms automatically, and when the shirt was gone she looked down at her chest and once again noticed how unfavorably she compared to Trish. No wonder he wants her, she thought. She's got a figure. And he can show her off to his friends.

She lifted her butt enough for her shorts to come off under Trish's nimble fingers, but when the girl went for her (once again damp) summer penguin panties, Keith interjected again with another instruction. "No, just use your teeth. It'll be more fun that way."

Trish grinned back at him, and then lowered herself between Susan's legs. Her lips tugged at the edge of her waistband like a light kiss, to get an initial grip, then she secured it in her teeth and began pulling down.

Susan didn't see what was fun about it... it was just awkward and took way more time, but at least it was time Keith wouldn't be fucking Trish, so she endured it. At least, until the panties were down to just below her mound and Trish's desire to lick underage pussy rose again and Susan felt a wet tongue wiggling up her slit. It was probably as much done as a show to Keith as it was to satisfy the orders of the marker, Susan could see Trish looking back at him in between the moments her tongue sloppily slapped against Susan's labia and clit.

"See, now there's a good girl. Make my sister cum and maybe I'll make you a fuck toy like her."

Susan frowned, trying to figure out if that counted as permission to cum... she didn't think it did. But as she now knew, Trish could give permission too. Except, she wasn't sure if she wanted Keith to know that. Maybe she should fake cumming? He'd realize it was fake, though which he might think meant she wanted Trish to be a fuck toy too. She certainly didn't want that. Fuck, when did things get so complicated?

The tongue felt good even if it was a show for Keith, and she was horny enough that she let out a few shallow whimpers of enjoyment. She leaned back more on her arms and stared up at the ceiling fan as Trish continued licking, so she could think of it just as a tongue and not the person behind it... could be Keith's tongue, or a dog's tongue. Either seemed preferable.

She looked back when she heard, felt a girlish squeal against her sensitive pussy, and the whispered words, "Do it." Keith, closer now and with his pants unzipped but not pulled down, was aiming his cock at Trish's body. He thrust forward, and although she couldn't see it enter her, she felt her body lurch forward in a way that shattered any illusions she might have had about it merely being a tease, his cock sliding underneath Trish. No, Keith really was fucking a girl in front of her. Sure, the girl was also eating Susan out at the time, but that hardly seemed important.

In truth, it did make it better, just because now Trish wasn't entirely in control of the sensations, Keith slid in and out of her with a steady, though slow, pace, which made sounds of enjoyment burst out of Trish and reverberate against Susan's clit. And sometimes he'd change up the rhythm and Trish's face would mash up against her getting all slimy. She liked that... both the feel and the sensation that she was 'messing up' the prettier girl's face with her wetness.

Trish soon found a way to minimize that, though, once he locked her lips on Susan's hole and sent her tongue up inside. Like that, unexpected thrusts only seemed to transfer the energy between them. At most, Trish's nose might bounce up against Susan's clit which was an unexpected delight. Still, more than anything it felt like Keith was somehow fucking her through Trish. Enough that she wondered if she would have a fuck toy orgasm when Keith came, or Trish did, or both... assuming she was allowed to cum.

"How you doing, Suze..." Keith said after a while of slow fucking and fast tongue-work that was pushing Susan past the point of super-horny and into painfully needing release. "Think you could cum if I let you?" Susan bit her lip, but nodded hungrily. "You know you're going to be switching places with her soon. Would you rather cum now, or then?"

That got a reaction, though not from Susan. Trish made a 'mrph' sound of confusion, clearly not expecting full incest after all, and then pulled her mouth away like she was gathering the breath to speak. Keith let her take the breath, but before anything beyond the start of an 'umm' sound came out, he leaned forward casually and shoved her face back into Susan's pussy, and looked at Susan like he was asking "Well?"

She only thought about it for a second. "Then," she said breathlessly. "Both" might have been a better answer, but she got the sense that wasn't allowed, and she wanted the almost magical release that came from a fuck toy who made someone cum.

"Okay, you can cum then." Permission granted, even if not right away, Susan smiled, relaxing. Knowing the orgasm would come eventually took the pressure off, and the tongue felt softer, more enjoyable. "Dirty little fuck toy," Keith added in a lightly teasing tone. "Want to cum while eating out Trish here. Are you sure you're not bi?"

Susan looked down to the girlish face buried between her legs, then back up to her brother and shrugged while making a wordless sound that approximated "I don't know," and the truth was, she no longer did. She'd cum from Trish licking her pussy once already. She was going to cum while returning the favor. It no longer disgusted her, or bothered her, it was simply a fact. No, that wasn't honest... she certainly enjoyed a girl licking her, and as for licking back? That was actually something she looked forward to, if only a little bit.

She always thought she was straight before. Sure, she might have played kissing games with friends, but it was just experimental, a laugh at best, but didn't make her blush or her heart leap. Now, she knew, part of the reason she chose 'Then' was that she wanted Trish to feel, through her mouth and tongue, how good Keith fucked her and that thought did excite her, sexually, in ways that made her wonder if she was straight.
Maybe she was bi now, yet another change to her essential nature Keith had caused... even without the marker. Maybe it was something fuck toys did, or maybe it was because she was super-horny, but she had those marks before and thought she was straight, so maybe this really was something that would stick with her long after every other mark faded. One of those indelible things that would just be a part of her from then on.

Trish seemed to have adjusted to the coming incest, after that first burst of surprise she returned to licking and enjoying being fucked, like she was desperate to prove her fuck toy credentials. If anything, her tongue seemed even more fierce... she clearly didn't know that until the magic words were said, or they switch places and his already spoken-permission would come into effect, it was a hopeless endeavor. Susan brushed a lock of juice-matted hair out of Trish's face and smiled as they made eye contact. She still resented the girl's presence, but she was doing an okay job at dedicating herself to someone else's pleasure.

When she next looked back at Keith, he had stopped thrusting. One hand rested on her butt, and Susan thought he might be cumming except he was quiet, and then she noticed his other hand was trying to get something from his pocket. In a second, it was in his hand and thrust towards Susan. The magic marker. Cap-on, pen-side away from her. An offering. "Go on. You can write something on her if you want."

***
Chapter Twenty-Six:

Gingerly, Susan reached for the magic marker, as though expecting he'd be a jerk and yank it away the moment she touched it, but soon it was in her shaking hand and she looked down and tried to figure out what the hell she was going to do.

She liked to imagine herself a writer before, but here, now, the words literally could change everything, at least about one person, at least for a short time. And the right words might make a bigger difference. If she wrote 'fuck toy' on Trish's shoulder it would be like telling Keith it was okay to make her one, maybe permanently, if he kept writing on her. Or she could write something embarrassing, disgusting, make Keith not interested in her anymore, or humiliate her.

Possibilities whirled through her head, not just of one mark, but several, things she could chain together to make Trish pay... pay for what, she didn't know, she didn't think the older girl actually did anything wrong, she was as much a victim as anyone else, but Susan was angry all the same, and with the marker, that anger could easily turn into a punishment.

Anger was wrong, she decided, even if it felt good. She had to think smart, write something that made Susan's life better, or give up and let Keith have another toy.

But nothing came to mind. It was hard to think strategically when your brother's girlfriend was trying to make you orgasm with her tongue between your legs, while you're craving a good fucking and some brotherly cum. She could vividly imagine the mean, humiliating things that she might make Trish do, but couldn't even think of one thing that might help, except maybe the word 'slut.'

That single word might make Trish fuck anyone who asked, and even Susan knew that could be a lot. She had strangers make lewd come-ons on the street and she was only twelve, imagine what Trish would get with a body like she had. Maybe, if she was a slut, she'd accept every offer and Keith would lose interest in her and stick to his personal fuck toy.

The marker dangled from her hand, and she uncapped it and leaned forward, looking for a good spot... on her shoulder, if she wanted to be kind, or on her forehead if she wanted to be sure people would ask her for sex. Her grip faltered. One might be kinder, but either would be mean. It probably wouldn't even make a difference, except to Trish. Guys liked porn stars, didn't they? Maybe Keith wouldn't care if Trish fucked the whole neighborhood.

It was almost funny, she had the power to change anything, but she still could think of nothing that would truly help. Unless.... She recapped the marker and flipped her fingers, held it out in a closed fist towards her brother, shaking her head. If she could think of nothing to help, maybe nothing itself was the answer, to refuse the temptation and try and lead by example.

He seemed confused by the decision, but only for a moment, then shrugged and took the marker back, sliding it back into his pocket. "Sorry, Trish," he said, although he didn't sound sorry at all. "I guess my little sister will have to show you how to be a good fuck toy. Switch places."

He stepped back, pulling his slick, shiny and still hard dick free and back into view, and the tongue inside her also disappeared as Trish sat back on her ankles and looked back at him, wiping her face with the back of one hand. "You're really going to fuck your own sister?"

"Somebody's gotta make her cum, since you sure can't." It was unfair, because he was the reason, and, anyway, she already did, in their room. Susan and Trish exchanged a knowing look about that, but neither seemed interesting in correcting Keith. "You got a problem with that?"

"No," she said, and using one hand to steady herself on the table, she got to her feet. "It's pretty kinky, but hey, I'm open-minded." More than that, she seemed eager, though she looked from Keith's proud cock to Susan's pussy and added, "You might want to be careful, though, you might hurt her."

Even if it was completely naive, Susan did feel momentarily better about not writing on Trish just then. With everything her brother had done to her, and with all the complicated feelings Susan had about her intrusion, she meant well. That didn't mean she didn't look forward to proving her wrong.
The first example of that came accidentally, though. She hopped off the table, and Trish got on, and before the older girl had spread her legs, Susan realized that her brother's cock was RIGHT there, and she was a cock-sucker, so she couldn't help but take it into her mouth and begin worshipping it like a porn star. No hesitation, she licked the underside of the shaft on the way up and enclosed it in her mouth, going halfway down like she'd done this every day... which, pretty much, she had, at least since the first time. The only difference was that this time, it tasted like pussy... she'd tasted her own pussy on Keith before, but Trish's seemed to give it a distinctly different flavor, faint, but noticeable, like a tangy citrus flavor, like sweat that had, at some point, had an orange soaking in it. If she didn't know where it was from, she might almost enjoy the additional flavor.

If her brother came in her mouth, she'd forget all about it as her craving for cum would be satisfied, but that wasn't in the cards either. Keith shoved her head away, and used her hair to turn her around. It looked rough, but it was kind, in a way... if she didn't see his cock, it was easier to resist the compulsion to suck on it. Looking into Trish's pussy, and then up past her breasts into her superior smile and flushed, excited face wasn't much better, but she knew she was going to have to do what he wanted to anyway... he said she could cum after they switched places, and they hadn't done that yet.

Susan wanted to cum, far more than she wanted to not lick pussy. So she decided to get it over with and lunged forward. He'd already made her bisexual, even without writing a word, so Susan decided she might as well try to be good at it.

There was more of that citrusy taste, although the sweaty, musky scent seemed stronger around the hole, though that didn't dissuade her, nor did the sudden gasp when her tongue made contact with the swollen pink crack.

"You ever have a girl eat you out before? Naughty slumber party or anything like that?"

She heard Trish answer saucily. "Oh, yeah. Slumber parties when I was ten were all about this. And at the pool all the girls eat each other out."

"No, seriously. Don't make things up, just tell me honestly. Ever have a girl go down on you?"

Trish's whole body shook a little along with her head. "I've never had ANYONE go down on me before. Honestly, before you, I'd barely done anything actually kinky. Mostly it was rubbing myself off on my stuffed animals."

"Oh yeah?" That seemed to pique Keith's interest. "What are you secretly a furry or something?" Trish didn't answer, and Susan could sense that same indecision she felt, not sure which answer would please Keith, or offend him. Unlike with Susan, Keith had mercy, and just moved on, "So how's my little sister doing, then?"

"Good." Her voice did seem to be higher, more strained. "Feels good. But she could do it a little harder." Trish grabbed the back of Susan's head and pushed her forward, and it must have counted as a fuck toy command because Susan's tongue darted up with more naked aggression, tongue-punching around the girl's clit, at least until the action got her tongue so tired that she needed to take a break, and then she switched to light nips along her labia, which to her surprise got Trish squirming and juicy. If she liked that, she must have felt like she couldn't take it anymore, because she whimpered, "Softer," and Susan adjusted, the nips turning into sucks, the tongue once again working in long, slow licks that didn't threaten to make her jaw sore.

"Good little fuck toy, isn't she?" Keith said, and she could feel the head pressing against the lips of her pussy, felt her insides seem to mold around him as he pushed his way in. When he grabbed her ass and started thrusting in earnest, he gave Susan a taste of what it felt like to try and eat a girl out while being bounced about... and, she hoped, gave Trish a taste of what it felt like to be jealous. She squeezed back against her brother, intending that he cum inside her before deciding to switch again, both because she wanted the fuck toy orgasm she was now allowed, and because she wanted her brother's cum inside of her, not Trish.

"Aren't you worried you might get her pregnant, though?" Trish asked.

"Nah, see?" One of his hands slid up her side and to her back, pointing to the word written there. "Infertile."

"Yeah, but that's just a word, it..." She broke off, seemingly stunned for a moment as things clicked into place. The fact the word was written on her back, maybe the handwriting being similar to what was now on Trish's body. "You wrote all that stuff on her!" She didn't sound outraged as a normal person might, her voice only carried a smug awareness with a hint of amusement, like she'd caught him doing something that wasn't allowed and was teasing him with it.

"Yup. But everything I wrote is true."

"So... she really can't get pregnant?" He must have nodded, but Susan couldn't see with her head still between Trish's thighs. "And I guess this isn't your first time treating her as a little fuck toy."

"You got a problem with that?"

"No... I feel like I should... I mean, it's so wrong, but... somehow it's just so... fucking... hot. Mmmph."

She was probably approaching that point anyway, but if she wasn't, she would have been when Keith said, "If it's hot, then you should cum now, Trish."

Trish's hands suddenly grabbed Susan's head and pulled tight into her, and an orgasm ripped through her... ripped through both of them. Trish's must have been from the Keith's words automatically pushing her over the top into a climax, while Susan got hers because she was a fuck toy. Later, she would wonder about that... Keith cumming in her mouth didn't trigger an orgasm, but Trish on her tongue made her legs turn to jelly and buckle as her brain caught fire with delight, and would decide that it was because oral didn't really count as sex unless it was lesbian, but just then she was absorbed in the sensation of a sudden, unexpected orgasm and the feeling that she was floating.

She wasn't actually floating, but her brother had taken over for her weak legs and was holding her up as he continued to plow into her. Trish might have cum, but he hadn't, and Susan gave a delirious smile as she realized that meant another orgasm was coming. In the meantime, eating Trish out became a lot more enjoyable now that her girlcum fed her addiction.

By contrast, Trish seemed like she was done, after her orgasm passed she leaned back, resting casually on her hands, her posture suggesting only mild interest rather than the extreme horniness that Susan still felt. "Wouldn't you rather have sex with me again, though?"

Having sucked enough girlcum that her addiction no longer drove her, Susan stopped licking and said, with a confident smugness that she wasn't sure she felt, "No." She hoped it was true, at least. Now that she'd cum, Keith pulling out to finish in Trish wouldn't be a tragedy, but it would be disappointing, and the fact that it was even suggested made Susan decide not to return to pussy-licking unless ordered. If Trish was going to try and steal her second orgasm, she could go without one of her own.

"You'll get another turn," Keith said, but his voice was strained, not just from the effort of holding her up by her legs, but from trying to put off his own impending climax. A few more thrusts, and she felt it, the tensing of his body with one last push forward, the cum flooding into her, and the orgasm that inevitably followed his own. Because her mouth wasn't occupied this time, she let out an quavering moan as her hands dug into Trish's thighs... she wanted the girl to know that she and her brother came at the same time. Even if it was just because she was a fuck toy, it seemed somehow romantic and she wanted Trish to feel bad that she could never have this level of closeness with Keith, to cum at the same time.

If she made that connection, she gave no sign, and the romance of the moment was undercut by the way Keith casually dropped her off when he was done and went to the fridge for a cola. "You sluts want to watch some TV?"

***
Chapter Twenty-Seven:

True to his word, Keith did make sure Trish got another turn, when his erection returned later in the afternoon, midway through a bad sci-fi movie, they played some more, at first on the living room couch, and then moving upstairs into his bedroom before anyone finished. The afternoon passed in a blur of sex acts, both straight and lesbian, humiliating photos that Keith swore he was only taking as reference for art, light bondage, and several orgasms for everyone involved, until Mom called to warn Keith that she and Dad were coming home, and that was Trish's cue to exit.

Susan was supposed to be taking a shower to get the stink of threeway sex off her before their parents arrived, but she couldn't resist waiting at the top of the stairs and listening as Keith and Trish had a goodbye. "This is without a doubt, the craziest thing I've ever done," Trish said.

"You loved it." It was a smug declaration, not a question.

"Yeah, it was intense... just... I mean it was great, like, using your sister like that... it was so fucked up." Susan could hear the huge smile in Trish's face as she said 'fucked up.' "But, next time maybe you could leave her at home and we could just spend the day as... you know, just us? Like, maybe tomorrow?"

"Sure, maybe," Keith said, but that might as well have been an 'absolutely' from Susan's perspective. "I'll give you a call later tonight." This was followed by the sickening sound of a kiss, a long one, although she couldn't tell who started it, it made Susan rage nonetheless, particularly with how long it went on, longer than the cum-swapping kiss Keith made her and Trish do. She started down the hall to start her shower before she made herself sick when she heard Trish say, "I love you."

Immediately, she began to tiptoe back and try and hear her brother's response, but although she heard a mumble, whatever he said he kept his voice too low for Susan to make out. A few seconds later, they were both out the door to continue their goodbye, and Susan finally got into the shower.

Keith didn't bother to shower, figuring Mom already knew what they were up to, and Dad probably wouldn't notice or care if he was smelly. By the time Susan was done, there wasn't much time anyway, both their parents were home, and their life returned to the sham of normalcy that now existed mostly to protect Dad.

Susan hung around Keith... she didn't want to tell him how upset she was about Trish, but she wanted him to see her, to not forget she was around, maybe to notice she was bothered. But he didn't, he was his usual self-absorbed jerk self, although he didn't tell Susan to get lost like he sometimes did, just quietly tolerated her presence.

While cooking dinner, his phone buzzed. He took it out and grinned a moment, and then, as Susan watched from her seat on the kitchen table, the words just slipped out. "What's that, from Trish?"

"No," he said casually, still grinning. "It's from Mom. She sent me a selfie."

That made no sense at all. "Mom's in the bathroom."

"Yup." He flipped it so the screen faced in her direction, as though aware that she might not believe him. Sure enough, it was a picture of Mom... a weird one, mouth partly open, eyes closed. If the background wasn't in her bathroom, Susan would have assumed Mom was asleep and someone else took it. And if it wasn't dead on her face she would have thought maybe it was an accident.

"Why would Mom send you a selfie from the bathroom?" Much less one like that.

"I don't know, I guess I'm just her favorite." But he still had that smug grin, like he was in on a secret.

"Yeah, I guess you're just Mr. Popular today."

He stopped with the chicken breasts he was searing, washed his hands, and looked. "What, didn't you have fun with Trish today?" She shrugged and looked away. "You got a problem with me seeing her?"

The way he said it, it sounded like he was baiting her into an admission that he could play with, rub in her face just because she was annoyed. "I don't care what you do with her," she said. "I'm just not interested in being involved."

"Hey, I tried to make it fun for you, too. And it sure seemed like you enjoyed yourself." A second later, before she could respond, he asked, "Why didn't you want to write something on her, anyway? Missed out on a golden opportunity... it might not come again."

"Yeah, well, maybe I don't want to write anything on people."

He stared at her for a moment, then said, "Bullshit."

"I don't. Not everyone's like you."

"Not everyone, maybe," Keith agreed. "But you are." He flipped the knob to heat the oven. It shouldn't take long, now that "Pre-Heats Quickly" was discreetly written on the side in magic marker.

"No I'm not."

"I know what it is. You just don't want to get your hands dirty. Tell you what then, tell me what you want to write on her and I'll do it for you. Anything you want."

"I don't want to write anything."

Keith chuckled darkly. "I don't really believe that. You really need to stop lying to yourself, Susan. Or at least lying to me." A sly smile broke across his face... she knew that look, it was the look of someone who'd just had an idea he liked. He took a few steps to look outside the kitchen to the living room where their father watched TV, oblivious to his children, and then returned right in front of where Susan was sitting and said, "Give me your foot."

Knowing what was coming, Susan bit her lip, but extended her left foot. He grabbed it by the ankle and pulled, not hard, but enough to put her off balance in her chair, and then removed the sock. He still had the marker in his pants pocket and within a few seconds it was out, and he was writing. When he was done, he capped the pen, put it back, and leaned up against the counter, watching with a grin as she pulled her leg into her lap and inspected the new change she'd have to live with. "Can't Lie To Keith," it said.

"Fuck," she muttered.

"What, you don't like it?"

"No of course I don't like it," she said, without even thinking, although she couldn't even be sure if she said it because of the mark, or if she would have told the truth anyway.

"What about being my fuck toy, do you like that?"

She tried experimentally lying, just to see if she could. The word formed in her mind, but her mouth just wouldn't open to say the word, because it wasn't the truth. When it was the truth she wanted to say, the word came out easily. "Yes." Her face flushed with warmth and embarrassment. It was weird, she was pretty sure she'd said as much before, but the fact that he now absolutely knew she was telling the truth, and not just saying it to keep him from being angry, that somehow made it a more intimate confession.

"Good to know," he said. "So, back to our little hypothetical question. What would you like me to write on Trish for you?"

Just for the hell of it, she tried to say the words "Nothing," but all that would come out was an actual nothing. That was useful information, though... she couldn't lie, but that didn't mean she had to tell the truth. Silence was an option... at least, it was as long as Keith didn't realize it was, and closed the loophole. That meant she had to say something, and it had to be true. "'Flat Chest,'" she said.

"Interesting choice," Keith said. "What else?"

"Panty Sniffer." It was a weird choice, but it had come to mind when the offer was first made, based on an insult that one of the girls in her class sometimes used. She pictured it working like 'Cock Sucker', being unable to resist whenever she saw panties. "Cunt Licker," she said next. It wasn't humiliating enough to make her like eating underage pussy, she had to have the unstoppable urge to do it for every pussy she saw, even at work. "Nudist." Keith kept looking at her, expecting more, so she added one of the darker thoughts she'd had on the edge of orgasm. "Dog Fucker." His face lit up with interest at that, and that inspired her to add the thought that followed right after. "Can Have Puppies." It would ruin Trish, hopefully in Keith's eyes as well, to get pregnant by a dog.

"Wow, little sister. That was dark. I can just picture it."

So could she.... she could imagine Trish standing naked in front of her, no chest but a huge swollen belly, complaining about what a dick her brother was, because that was part of the question, part of what made it attractive, that Keith did the writing and not her. And there was one more thing, in her imagination, the picture in her head included, written along one leg, "Writing on skin never fades."

That would have to stay in her imagination. Because even though, somewhere deep down, she wanted Keith to write it on Trish, anything she suggested was an idea she was putting in Keith's head he might use elsewhere, and she must never give him that idea. Luckily he hadn't asked if there was anything else, he seemed to think getting Trish pregnant with puppies was the worst of it. "See, I told you you're just like me."

"The difference is that I don't think you should do it."

That threw him for a moment. "Wait... I asked you and you said you wanted me to!"

"Just because part of me wants it doesn't mean it's right, or even a good idea. Think about it. Right now maybe she thinks this is all in her head, but if her boobs go away when you write 'Flat Chest' she's going to know the marker's magic. Other people are going to find out, too. And maybe you can keep me, and Mom and Dad under your control, but Trish? Her parents? You going to write on everyone you meet? And keep writing on them to keep it fresh?" That was interesting... it wasn't quite a lie because she hadn't told him about her idea to make the marks permanent. And maybe that wouldn't even work, maybe the magic didn't have a loophole like that. But it certainly felt like she was pulling one over on him, giving him a problem she'd already thought up a solution for. She couldn't lie to Keith, but she could deceive him. Words mattered. "I don't think you're an idiot but sometimes you act like one. Seriously, I can't lie to you so I must be telling the truth... I don't think you should write all that on Trish."

"I never said I would," Keith said with false casualness. "I just wanted to know what was in your head." But he had said he would, Susan remembered, it was practically a promise. That was what made it so hard to tell the truth until he forced it out of her. "Anyway, you're distracting me, I've gotta finish dinner. Why don't you go bother Mom or something?"

She slid off her chair and onto the floor to retrieve her sock, then put it on and moved for the door. "Hey, Susan?" She froze. "The other night... were you making a play to take the marker?"

Shit. She couldn't lie, and not saying anything was about as good as admitting it. "Yes."

"I fucking knew it. You little sneak." Despite the words, he didn't seem especially outraged at it. And what he said next, he seemed a lot more like his old self, uncertain, even a little sad. "You really want the fun we're having to end? Is it that bad?"

"I don't know. I like most of it. I just don't want it to get any worse. Things are already so crazy, and I don't know how much more I can take."

They were quiet for a few moments, and she thought it was the end of it. "You know I wouldn't let it get too bad, right?"

She needed time to come up with an answer the mark would let her say. "I wish I could say I trusted that." And she left without waiting for another question.

***
Chapter Twenty-Eight:

Keith and Susan didn't revisit their conversation in the kitchen again that night, and the rest of the evening passed in almost normalcy, given that normal now included her brother fucking her after dinner while their Mom played lookout to make sure their dad wasn't coming upstairs. He did at one point... not into their room but Mom frantically burst in and whispered that they shouldn't move, while Susan sat on her brother's lap in his computer chair with his cock up her ass, for the minute or so it took for Dad to find what he needed and go back downstairs. Afterwards, Mom came in to watch Keith finish, and only had to say, "You really should make her wear a gag every time."

Once that was done, Keith and Susan didn't talk much at all... she wasn't in much mood for talking, and he seemed pretty busy in conversations on his phone, even had it in his hand while he fucked her ass. No doubt talking mostly to Trish, although Susan never got to see any of the texts. The only thing he showed her was another weird selfie from Mom a few minutes after she left the room after watching him cum inside her. This one looked like she was biting down on her finger. Then he got wrapped up again in texts from someone else and Susan left for her own bedroom.

When Mom and Dad finally went to their new early bedtime to spend a few near-comatose hours, she was almost dreading her brother calling her to bed, not for the sleeping together which she enjoyed, but because she expected he'd try and ask her more uncomfortable questions that she couldn't lie about.

To her surprise, he didn't. He called her to bed of course, and made a show of putting the marker in the lock box this time, but he didn't ask her a single thing, and she wondered if maybe he regretted writing that last mark, or the things she said. People always said the truth hurts, and when you know something hurts, you usually try to avoid it.

The next morning, Susan woke up alone. Keith must have slipped out early sometime in the early morning while Susan slept in, a pillow over her eyes blocking out enough of the early-morning light so she hadn't roused earlier. And her sleep had been troubled by dreams about writing horrible things on Trish, and half-awake worries that she'd pissed her brother off.

A quick check of the clock once she finally sat up revealed that her parents were probably already gone, and she smelled bacon cooking downstairs, which she supposed solved the mystery of where Keith was. So she rolled out of his bed and walked naked back to her own room, where she chose a shirt that just barely covered her butt, and left without putting on panties... she would have gone completely naked, because she was starting to get super-horny again and Keith might be more likely to fuck her if she didn't wear anything, but there was the tiniest chance somebody else was there, so she chose a yellow shirt with a sun on it in white and the word "Shine," and headed downstairs to see if she could get some of the bacon.

The bacon was already done when she got there, and Keith was eating a toasted BLT when Susan entered, and looking at his phone. Unlike her, he was fully dressed, even nicely dressed, a clean black sports jersey with the number 69 on it and a pair of shorts in similar colors. She looked again at the number... she could have sworn the number used to be 63. She wondered if maybe he'd done something with the marker, but the line of thought was forgotten when she noticed he was wearing shoes.

"Are you going out?" Again, she left unvoiced. Yesterday was bad enough.

After swallowing a mouthful of BLT, he said, "Yeah. Going to see Trish." The scowl she felt must have shown on her face, despite her best efforts, because he asked, "Got a problem with that?"

"I think it's a bad idea."

"Too bad. You may think you know everything, but I do what I want."

"Whatever." She walked up to the counter, and to her surprise, there was still bacon on a plate, and even slices of tomato already cut. "Is this for me?"

He shrugged. "You can have it, if you want."

She got some bread and put it in the toaster, then turned back to her brother. "So what are you going to do with Trish?"

"Whatever I want." The smug smile on his face lasted just for a moment before he said, "Don't worry, I'm not going to write the stuff you suggested." That was a small relief, at least until he added, "Not all of it, anyway."

"You shouldn't do any of it. You should just stay home today."

"Is that what you want me to do?"

Susan nodded. There was one good thing about her latest mark, thinking up lies was a waste of time, and sometimes she might as well just tell the truth. "Yeah."

"Kinda funny... it wasn't long ago that you wanted me to go after Trish. Now it's almost like you're jealous."

The mark didn't save her entirely from needing to think on her feet. "I decided you're not good for each other." Not lying, but not answering his implication at all.

"Yeah, but what do you know? Just because you can't lie, doesn't mean you're any smarter than anyone else. Besides... I already told her I'd spend the day with her. I'm picking her up in a couple minutes, so I don't think I'll have time to fuck you this morning, sorry."

The day? She hoped that was an exaggeration. If not, who was going to fuck her when she got super-horny? "You could always call her and say you changed your mind at the last minute. That's what a jerk would do."

Now he grinned again, and this time it was almost mean. "Oh, now you want me to be a jerk? It's a thought, but nah, we've got some fun stuff planned."

"How long are you going to be gone?"

"Hard to say. I'm sure I'll be home by three, anyway."

"Three?" The word came out almost strangled. "But that's so long!" He shrugged, seemingly unconcerned. "Can I at least have permission to cum while you're gone?"

"Oh, no, that would defeat the purpose."

"What purpose?"

"You didn't think you were going to get off scott-free for trying to steal the marker, did you? I mean, I guess I can't blame you for trying, but... that doesn't mean you should get away with it."

"I thought that was what you were doing yesterday!"

"No, yesterday was just for fun."

Susan closed her eyes and took a deep breath. "So you're going to leave me here super-horny all day."

"You're the one who wanted me to be a jerk. And... you know what? It's way more fun being a jerk to you." He got up from the table and walked over to her by the toaster, looking down at her, gently touching the side of her face. "But hey, imagine how good it'll feel when I finally get home." He leaned in, and for a second she thought he was going to kiss her, and she tilted her face up to meet his... and then he was gone, one of her two remaining slices of bacon in his hands. He popped it into his mouth and took a crunchy bite. What a jerk!

"I don't know if I can wait that long," she admitted, hoping the truth would make him a little bit nicer. "I'm addicted to cum, remember? And I haven't had any since last night."

He took the rest of that slice of bacon with one more bite, and seemed to consider the issue, like maybe leaving her in withdrawal was a little too much punishment. "Okay, I'll make you a deal. I'll let you suck me off right now... if you give me the last slice of bacon."

I guess I'm having a BLT hold the bacon, she thought, and got to her knees just as the toast popped.

***
Chapter Twenty-Nine:

Susan's cum addiction may have been temporarily satisfied, at the cost of bacon, but within a half hour after her brother left, with the words, "Think of what me and Trish might be doing when you masturbate," the other marks on her body were already starting to drive her crazy... or maybe she'd just gotten addicted to sexual release without the marker. She needed it. One day of this was bad enough... facing a second day in a row seemed like a nightmare.

Her super-horniness was already to an uncomfortable level when she sucked her brother off, and it felt like nothing was able to distract her from it for long. Watching TV, getting on the Internet, even digging out one of her old coloring books and trying to lose herself in focused drudge-work always just devolved very quickly with her thinking dirty thoughts, sometimes watching something dirty, with something in her ass or pussy. She did wind up thinking about Keith and Trish while she did it, too, not deliberately taking his advice, the thoughts and images were just intrusive. She didn't want them, they made her sick inside, but at the same time, they didn't make her any less horny even while they made her incredibly jealous... if anything, it was the opposite.

She'd rub herself until it was starting to get painful and then look at the clock and find that only a few more minutes had passed. At one point she even checked over her naked body in a mirror just to see if Keith had somehow written something on her while she slept, because it was so much harder to take than last time... but no, she decided, while masturbating to her own reflection, it must just feel worse because she knew what was in store. At least yesterday, she had the hope that he might return at any moment and fuck her brains out. Today, she knew he wasn't planning to be home until three, and... who knew? Maybe he'd be so tired from fucking Trish all day he'd have nothing left for her?

Two hours in and she found herself muttering "Gotta cum," to herself, almost like a mantra, and she was pretty sure she was twitching, and not just her holes. She was pacing around the house, her vibrator in her ass and one of Mom's dildos in her pussy just because her body craved activity, or at least she thought that stimulating it until she couldn't anymore was better than just lying there and needing it.

On one of her repeated trips through the kitchen, she stopped by the fridge trying to decide if eating might take her mind off it when she noticed the magnets on the door again, "Don't Just Complain About Problems, Find Solutions! Think outside the box."

The only obvious solution was to call and try and beg Keith to come home, but she didn't think that would work. So maybe thinking outside of the box was the answer... but could she do that when her needy wet box itself was the problem?

She sat at the kitchen table and tried to think up loopholes.

She couldn't cum unless she had permission.

It didn't have to be Keith's permission.

The thought, though obvious, hit her like a lightning bolt, and she raced up the stairs so fast that her vibrator slipped out of her ass. Luckily, it wasn't on, so she just left it there, took out the dildo and threw it on her bed then got on her computer, opened up her word processor and wrote, "YOU HAVE PERMISSION TO CUM, SUSAN."

It was a nice thought, but a couple minutes of masturbating convinced her that this was not the loophole she needed. If you could give yourself permission, you never really needed it. She needed someone else. Like when Trish gave her permission.

She remembered the vengeful thought she had last time, that if Keith wasn't around, maybe she'd find somebody else to make her cum. Now she knew it was an option, and yet... she wasn't sure she should go that far. Maybe there were still safer options. She looked at her phone sitting on her desk... she hadn't used it much lately, because she'd been so busy with Keith, but now she needed to reach out and touch someone, as her dad sometimes said. She opened up her contact list. There was Mom and Dad first, of course, and she thought about it, calling one of them and asking permission... Mom at least knew what the word meant, though Susan'd have to explain why she called. She'd probably get yelled at for bothering Mom at work. Dad was out of the question. Below that was Keith, but obviously there was no hope there. Below that, friends.

Well, what were friends for if not to help you out of a jam, right?

She might even be able to do it without them knowing... just like what she imagined Dad saying if she asked if she could cum. "Come where? To work? No, of course not." Except somewhere the answer might be yes. Some of her friends were away on vacation so it would be impossible, but there was at least one where this trick might just work.

Just having a plan seemed to help her frustration a little, so she lay on her bed, spread her legs, and bit her lip for a second before pressing to call her friend Dana. Then she hung up and decided to call her with FaceTime instead. Dana liked it better, and there was a chance permission required a voice and a face.

After a wait just long enough for Susan to consider trying somebody else, the call was accepted and a round face with glasses appeared. She appeared to be lying down on her back, judging by the way her hair, loose and messy rather than tied back like she usually wore it, hung splayed out behind her. Her hair color looked darker on camera, and Susan hoped that her expression worked the same way, because she did not seem happy. "Yeah, what do you want?"

"Hi, Dana."

"Hi." The response was unenthusiastic, flat voice and her eyes slid away like the television in her room was more interesting. "So, you're finally talking to me again?"

"What?"

"I like, haven't really heard from you in forever, except like when I message you, and then you, like, barely respond. Figured I must have done something."

"No..." she said, drawing out the word and feeling pretty shitty, even shittier that she was using her friend. "I'm really sorry, I've just been... distracted. But I miss talking to you."

"Yeah? What, wrapped up in some big new story or something?"

"Something like that." It was a kind of truth, if she still planned on writing the true story of her experiences with Keith, then she was absolutely wrapped up in the middle of it. "Really. I'm sorry." Also true.

Finally, Dana cracked a smile. That was one of the good things about her, she might be mad at you but she didn't stay that way for long. "I guess you're obviously not working on it right now if you're calling..." She rolled over, or the world on screen did, since she was holding the camera on her face. Her hair fell across her face and now cleavage was visible below her chin. "Did you finish, or you hit writer's block or something?"

"I am pretty frustrated." Her fingers slid along her puffy wet pussy lips again... it was safe to do this as long as the camera stayed on her face... even more exciting, to be masturbating and no one else realize it. All she had to do was keep her expression stone-faced.

"So, what are you doing right now?"

It was a direct question she couldn't wiggle out of, and she almost bit the bullet and said, "Actually, I'm masturbating and it's really difficult right now," then remembered she didn't have to tell the truth to her, just Keith. All that time beating around the bush with technically true answers wasn't even needed... though she supposed it was good practice. But if she could lie when needed, it made it a lot easier. "Nothing, really. Just bored. What are you doing?"

"I was going to go over to Stacey's." Susan's breath caught and she slid two fingers inside of her, hoping she'd get the chance she needed, but she let Dana finish. "We're going to play on her trampoline and maybe do some videos and her dad's making us lunch, so..." Dana's mouth made an exaggerated smile, like she often did when she made some kind of joke she expected the other person to notice. This time it was an in-joke that was just common knowledge to her friends... Dana's parents were horrible cooks so she always relished the chance to eat somewhere else... an easy way to get Dana to go somewhere was to provide some kind of food. But that hardly mattered to Susan. Nor did the fact that she really didn't like Stacey all that much. In truth, she was barely listening once she heard that Dana was going out.

All that mattered was the answer to one question. "Uh-huh," she said, trying to keep her face still while her fingers dug inside and she ground the heel of her palm against the clit as she prepared to ask it. The sensation made her eyes close hard and then open wide again, but she hoped it would look like an extended blink. "Can I cum?"

"I don't know," she said, her eyes directed upward at the ceiling. "I guess I could text her and ask."

"Yes, please," Susan whimpered. "I'd really like to cum."

Dana got up, picked up her second, older phone that was on her nightstand, and started tapping into it, giving Susan time to just rub herself and hope... she didn't even have to be careful of her expression, since Dana's attention was elsewhere. Mostly, anyway, for after a few seconds of silence Dana pointed out, "I thought you didn't care much for Stacey anyway?"

"Uh-huh."

She looked directly into the camera and Susan tried to focus on a normal expression, although it was hard to keep track of both what that was and what her face was already doing and the sensations her fingers were providing all at once. She settled for just moving her face as little as possible. "So what's the big deal? We can hang out some other time."

"Please, I'm tired of being home alone... I just wanna cum so bad." The whine sounded, to Susan, like a failure of playing innocent and more like something out of one of the porn videos, but as long as Dana didn't notice...

"Oh, your brother's not home, huh?"

Did Dana know her brother had been helping her cum? No, wait, that was impossible. So she probably didn't notice. She let her fingers go still while she thought up an appropriate answer, which happened to be the truth. "No, he left me to hang out with his new girlfriend."

"Wow, Keith got a girlfriend? When did that happen?"

"Yesterday, I think." Her fingers started rubbing again. "So? Can I cum?"

"Jesus, hold your horses." Susan closed her eyes and briefly imagined horses, although she wasn't entirely sure what their cocks looked like. Big, probably, but were they shaped like human cocks? Something to look up later. "She still hasn't answered yet." A few seconds later, Dana looked at the camera. "You okay? You look kind of flush?"

"I'm fine," she said. "Just hot." Were horse cocks hot, or ugly? For some reason it seemed very important to know.

"Yeah, it's a warm one today," Dana agreed. "I thought you had air conditioning though?" She shrugged, still imagining horse cocks. "So, have you met her before?"

For a split-second she thought Dana was talking about Stacey, not Trish. Then once she realized Dana was talking about her brother's girlfriend, Susan started imagining her getting fucked by a horse. "Yeah."

Dana leaned in as though for gossip, and accidentally showing off her cleavage again. People at school often accused her of doing it on purpose, and Susan knew she absolutely did, sometimes, but just as often she did it accidentally because she liked wearing shirts that cut low. "What's she like? Like, I mean, what's she look like?"

"You know, pretty. Big boobs." At least, compared to Susan. But compared to Susan, Dana had big boobs too. Trish's would probably swing wildly while getting fucked by a horse. God, she needed to cum so badly.

Dana looked back at her other phone as a chime sounded. "Yeah. Okay. She says okay."

"Okay?" She pulled her hand out and started to look around for something better than her fingers, as it looked like she might be needing it soon.

"Yeah, Stacey's okay with it."

Say the damn words, Susan thought, as her free hand began groping for the dildo she'd found nearby. Finally it closed on it and she shoved it inside, picturing her riding her brother's cock while watching the horse fuck Trish. "So I'm allowed to cum?"

"Yeah." A pause for a breath, then she said, "Yeah, you can come. I'm on my way in a few minutes. You can get there all right on your own, right? She doesn't live far from you."

Susan was barely listening. "Yeah. Thank you. Thank you for saying I can cum." And with the flick of a finger she ended the call without even saying goodbye so she could scream.

Except, she didn't, except to yell out "FUCK!" when she realized that she still couldn't cum, as she flung the dildo away in frustration. Cum wasn't the same as come, even if they sounded the same... or maybe permission only counted if they knew what they were giving permission for. She was just going to have to lie here and suffer until her brother got back. After she let her heart rate slow and breathing calm down again, another thought struck her. "Shit," she said out loud.

She'd just agreed to go hang out at Stacey's house. Practically begged Dana to allow her to tag along. What would she think if Susan just flaked out? Friendships had been ruined for less. Susan had even once wrote a story where a missed lunch date because of a misunderstanding led best friends in neighboring kingdoms into a feud that escalated to the point where they both hired assassins to kill each other. Dana herself had called it realistic.

She couldn't back out of it... at least, not without ticking off one of her best friends. Maybe it might even do some good, though... her horniness was always at its worst when there wasn't anything to distract her. And, there was always that possibility that she could get what she wanted anyway, stir the conversation to something like Truth or Dare. Until this summer, Dana was always wilder than her... sure, Stacey was a bit of a prude compared to both of them, but things changed.

Susan dragged herself off her bed and started looking through her closet. She had to find something to wear that would cover all of her marks. And she was going to have to take a very cold shower just before she left.

***
Chapter Thirty:

It seemed like forever since Susan was outside. Since becoming a fuck toy (even before, for the week she had smelly feet had almost the same effect) she'd barely left the house, and frequently was away from the windows because she was mostly undressed. She'd almost forgotten there was a whole world outside, in the middle of summer. The colors seemed brighter and more vivid, almost painfully so, but what really hit her was the heat.

Dana wasn't kidding, it really was a hot one. Inside they had air conditioning so she hadn't had to even think about the weather. Stepping outside, she was confronted with a humid gust of air that made her regret her decision to go to Stacey's place at all. If the heat wasn't bad enough, it was made worse by what she was wearing.

She'd thought about it a lot in the shower, about how to hide everything she needed hidden. That included things like deciding to leave her phone at home, and off, so if Keith asked why she hadn't answered a call on it she could truthfully say she left it off, but the more important issue was hiding the marks on her body from her friends. While the water streamed over her body, she examined them carefully and evaluated what clothing options she had available that would leave them hidden. Sandals were out, because she might have to take them off and the bottom of her feet might be seen, and then someone might want to know why she had "can't cum without permission" on her. So, instead, white socks and her running shoes. Skirts were out of the question as well, and so were any shorts that weren't long enough to cover the "Sucker" on "Cock Sucker." She had some capris of various types that cut off just under or above the knee, but she also had to think of one other thing... although fresh from the cold shower it might not be a problem, but when the horniness kicked in, she didn't want her damp crotch to be obvious. That ruled out the lighter colored options, and in the end, out of excessive fear, she went with some black yoga capris that hugged her body in a way she was half-proud of, half-ashamed of, but soon forgot entirely with the realization of how hot it was with the sun on them.

Up top, she had to be sure not only that the shirt was long enough to cover her back, but more importantly, it had to cover her front, from any position. Dana may have loved to use the trick of deliberately wearing something that gave a peek when you bent down too low, on teachers, guys their ages, and even Keith once, and Susan had tried it herself on Dana's suggestion, but most of her shirts didn't work for that. But it was still a problem... in too many of them, even if nobody could see a nipple no matter how far she bent in front of them, they could see the words 'Fuck toy' blazoned across her chest. She had to bend down in front of her mirror to check everything she wore, and of those that passed was a rose-colored blouse that only opened to a tight circle at the base of her neck and with sleeves that had cut-outs for her shoulders. It wasn't as bad as the pants, but she still wished she'd chosen something lighter, looser, maybe even showing off her belly.

At least it was only a short walk to Stacey's place, and the heat and humidity wasn't so bad after the first oppressive punch... after a lot of vigorous sex her brother's room sometimes got pretty hot and stuffy too, and at least outside there was an occasional breeze and fresh air. Not to mention people, plenty in cars, a few walking about the streets including their neighbor walking his dog who gave her a smile and a nod and dragged the pooch away by the leash before he could smell her, and Susan blushed reflexively remembering her brother's threat to her and, once they were passed, looked back to see the dog's balls under a happily wagging tail.

That got her thinking about cocks, which was probably not the right thing to be doing, she had to hold off her super-horniness as long as she could, but seeing people about she couldn't help but think of what could happen. Maybe she didn't even need to go to Stacey's, she could find some horny teenager (and there seemed to be a few attractive young men, and even older men she wouldn't rule out) and offer him sex in exchange for letting her cum. Maybe she wouldn't have to ask... even at twelve years old, she was no stranger to random men with a lewd come-on. Before that made her blush, but now... well, if some asshole shouted at her from his car window suggesting she suck his cock... she was a cock sucker. Could she really refuse? Or would she walk right up to his car, get in, and start sucking?

Her thighs squeezed together and she had to stop herself from sliding her hands into her capris and rubbing herself right there to the thought. Doing that right there on the street might get her what she wanted, in the end, but it could also ruin her reputation forever, and she didn't want that. Still, it was an option... she'd go to Stacey's, and if she hadn't find a way to get relief by the time she went home, maybe she'd get a little bold with some lucky guy.

As she cut through a small park to get to Stacey's place, the chance of random pervert assholes in cars vanished and she began looking for other options. There was a teen who she often saw on one of the benches, smoking there because he wasn't allowed to at home, maybe if he was there on the way back he'd want to do something else he probably wasn't allowed.

Susan knew that thoughts like these were not the best use of her time and tried to force her mind away. She'd gained some measure of composure from the cold shower and having something to do... not to mention the sheer frustration of being so close and yet unable to cum which sometimes briefly gave her a relief from the horniness, as her body's hormone production seemed to shut down in exhaustion... even her pussy seemed to run out of lubrication for a while. It came at the cost of a queasy anxiousness and a fog-covered unsatisfied brain, but it was still a break of sorts, one that made this whole trip possible. But if she didn't keep perverted sex off her mind it would ruin all that and she'd suffer through the whole visit dripping wet and looking for some way to get off... but it was hard not to think dirty thoughts when you were a super horny fuck toy by nature.

Stacey's house was two stories, like Susan's, but the Mancuso family, although Stacey insisted they weren't rich, were a lot closer to it than Susan's family was, with almost twice the square footage and a huge yard where she could see a trampoline in a safety net. Dana had mentioned they might play on that, something Susan had yet to try, but no one was out there when she arrived, so she walked up to the front door and rang the bell.

She'd never been officially introduced to Stacey's father before, just her mom, but she'd seen him from a distance in passing and recognized the older man who opened the door as him. He was large, both in height and his overall frame, the type of guy who looked like he was a jock like a football player at one time but had let himself go and now had a bit of a beer belly, though the oversized t-shirt, with a motorcycle company logo on it and stretched sleeves, were a testament to how beefy and muscular his arms still were. Aside from a touch of grey to his dark hair, he looked around the same age as her own dad. Her eyes next went to his crotch, but although he wore long shorts she couldn't get a sense of the size of his cock.

She blushed at the realization that it was one of the first things she thought of when she met somebody, but he must have assumed she was just shy, because he said, "Hi. You must be Stacey's friend." His voice was friendly, but it had a booming quality to it, like he was used to speaking in front of an audience and got in the habit of projecting all the time.

"I guess," Susan replied. She probably wouldn't have considered Stacey a friend, but that would be kind of rude to say to her dad.

"She and her other friend are upstairs in her room," he said, and he stepped back to allow her inside.

Without any further words, Susan darted past him and walked upstairs. In such a situation, the old Susan would have been more polite, maybe spent a minute chatting with him, but now she was a little afraid that she might say something inappropriate and so just moved on.

Old memories of a birthday party she attended a couple years back guided her up to Stacey's room, but it would have been easy enough to locate it even if she'd never been to the house before. Her name was on the door in pink-painted wooden letters, and she could hear music coming from inside, so she figured that's where Dana and Stacey were.

At least she hoped it was Dana and Stacey... Dana never did say that nobody else was coming, and it would be awkward to show up if it was just Stacey and someone else from school Susan didn't know well. At least Dana being there would serve as a buffer.

She knocked on the door, the classic shave-and-a-haircut, two-bits pattern. Seconds later, the door opened a crack and a freckle-filled face, her height, stared out at her, then put on a smile that didn't seem to go all the way to her eyes. "Oh, hi, Susan," Stacey said. She opened the door, and to her relief, her friend Dana was the only other person in the room, lying on the bed in shorts and a cropped t-shirt.

Stacey was similar in height and body shape to Susan. In fact, since they both had dark hair, of almost exactly the same shade, they were often mistaken for each other from the back. From the front, the splash of freckles on Stacey and her longer, more narrow face with a more square-ended jaw set them apart, but if you didn't look at their faces you might think they were sisters. At school Stacey tended to dress conservatively but fashionably, pastel-colored pants and blouses that didn't dip down too far or come up past her waist, but today, at home, she wore an orange t-shirt, with some kind of tropical scene sketched onto it, but which rode high enough to expose her belly button and loose grey shorts.

Dana, on the other hand, used to be roughly the same body type (aside from her hair, which was lighter and usually in a ponytail, immediately distinguishing her from the back), but in the past few months had been hit hard with puberty and gained several inches of gangly height and a chest that, while not as big as Trish, still attracted stares and a lot of comments from the boys in their class. She alternately loved and hated the attention, attention she hadn't got before as her glasses and braces marked her as the class geek even though her academics were only slightly above average. She was lying on the bed, her bare feet curled up in the air above her butt, which was also clad in shorts, only pink with white trim and much smaller and tighter than Stacey's, and a white tank-top, different than the one she was wearing on FaceTime, which covered her shoulders... she must have changed just before running out.

That left Susan as the most dressed person in the room, but she didn't think it would be a problem... and it wasn't, at least at first.

The girls exchanged greetings, although Dana's was the only one that seemed genuinely happy... Stacey's was at best half-hearted, but at least she didn't seem rude. After a few seconds of mutual staring, Susan asked, "So what are we doing?"

At this, Stacey did brighten a little. "We're making music videos." It wasn't what Susan had expected, and she must have looked confused because Stacey explained. "On the Internet. I do it for my fans, usually just solo but they've been suggesting some group ones and that's why I thought it might be useful to have a third person."

Susan sensed Stacey's statement suggested, "that's the only reason I let you come along," but without being outright mean about it. Which meant Susan didn't feel she could be mean back, at least not openly. "I didn't realize you could sing."

Her eyes narrowed just for a moment as though she herself wasn't sure it was an insult. "Well, I can."

"It's mostly just dancing and lip-synching though," Dana said.

"Yeah, for the videos, that's all we need, but sometimes I go and add my own vocals later, just because my fans like it better. Maybe not for this one because it's a group." Without being asked, she explained, "See, I started with doing the top hits from when I was born, but, like, since people liked it I started doing requests."

I don't really need the back story, Susan thought, but instead asked, "So what song are we doing?" She thought it was best to play along and then maybe find a way to cum later.

"'When I Grow Up'? It's by the Pussycat Dolls?"

Neither name was particularly familiar, although Stacey wanted to get right down to business and demanded they listen to it a few times and practice lip synching along, and by the time she heard it, she remembered the general tune. By the time she heard it four times in a row, she was pretty sick of it, but not enough that Stacey was satisfied they could lip synch it and just start dancing. That took at least three more repetitions.

The only reprieve came briefly when Stacey's dad came in. Susan flinched at first when there was an unexpected voice behind them saying, "Sorry to interrupt...."

"Daddy!" Stacey whined. "You should have knocked! What if we were changing or something!"

"Sorry, sorry!" Susan's eyes narrowed as she looked at the man, whose, despite his words, let his own gaze roam over all three of them as though inspecting what they were wearing, and she wondered if maybe that was his hope all along. She then looked to Dana to see if she caught it, but wasn't sure... she just seemed to have a warm smile on but couldn't be sure if she didn't think that, or did and just liked the thought.

Could Dana be fucking Stacey's dad? She wondered, for a moment, but dismissed the thought. What happened with her brother, and her own super-horniness, had corrupted her, she was seeing sex everywhere.

"I was just getting ready to start on making lunch," Stacey's dad continued. "And I wanted to make sure I asked if either of your friends had any special dietary requirements I needed to be aware of before I decide what to make. I mean, I wouldn't want to serve meat to a vegan, you know?"

Dana's cheery "I'm good with whatever," was met with a nod and smile, and then he looked to Susan.

"She doesn't, Daddy!" Stacey said, which seemed pretty rude to Susan. How would she know? They had barely seen each other since the end of school, and weren't close before that. Maybe Susan had a weird allergy. For that matter, for all Stacey knew, Susan could have gone vegetarian this summer. And recently...

She snorted in amusement, drawing curious glances from her friends. It was KIND of a dietary requirement, that she now needed cum. She pictured telling him, straight-faced, "Whatever you make needs to have cum on it please." And underneath that amusement was the hard-edged reminder on her nerves, the jonesing, that she hadn't gotten her fix yet. It was going to be an issue soon. "I'm flexible," she answered anyway, and imagined him testing how flexible, using her pussy or ass while her legs were pulled back behind her head for the best view of herself taking his cock...

To attempt to banish the arousing image before her body started responding to it--or responding more to it, for it already had started--she closed her eyes tight and shook her head. Her struggle must have gone unnoticed in the room, because Dana asked, "So what are you making?"

"I was thinking of making my world famous steak fajitas, it that's good with everyone..."

"World-famous, huh?" Dana grinned, flashing her braces, although his gaze might have been a little lower, on the cleavage displayed by Dana's top and her position lying stomach-down on the bed.. "Well, then I look forward to seeing what all the fuss is about!"

"I'll holler for you when it's ready," he said, and ducked back out of the room, leaving the door not quite closed.

Stacey got up and closed it, then said, "Okay, back to practicing."

At least they soon knew the song well-enough that they could practice dancing along with the lip-synch. Here they weren't trying to match the dances in the video, Stacey said she wanted a more free-form approach, but she still managed to be a control freak about how free-form they were.

"Why do you keep grabbing your chest there?" she asked Dana early on.

"I don't know, it made sense?" Dana said. "The song says, 'I wanna have boobies.' Why would you do a squat then?'"

That answer earned Dana a confused stare, blank incomprehension from Stacey at first, and it even took Susan a second before she realized where Dana made the mistake and burst out laughing. "I think it said, 'I wanna have groupies.'"

"...No, it can't be. So, like, this is a lesbian group? Wow, progressive."

"No!" Stacey sounded scandalized at the thought. "Of course they're not a lesbian group!"

"Groupies are the girls who have sex with rock stars. I don't think there are boy groupies."

Normally Susan would take Dana's side in a fight, but here... "I don't see why there couldn't be boy groupies... if they want to f... have sex with the girl rock stars. Or gay boy groupies too for like, Adam what'shisname."

"It's not even about sex!" Stacey insisted with a scowl. "Groupies just means fans! They wanted fans!"

"Not normal fans. I still think 'boobies' makes more sense," Dana said. "Who wants to grow up and have groupies?"

"It's not boobies!"

"Can I grab my chest on that line anyway? I mean, it's a good move. Better than the squat."

"No. It's crass." Stacey rolled her eyes and went back to her computer. "And obviously we need a refresher on the lyrics."

So, that led to them listening to the song again, this time with the lyrics as subtitles. "Huh. So it WAS groupies." Dana agreed grudgingly, but it was the only part anyone had gotten wrong, so thankfully they were back to dancing to the song after that.

The dancing was actually helping Susan's own problem. The rhythmic movement helped burn off some of the nervous energy her horniness had built up, and dancing... well, it wasn't sex, it never would be like sex, but there was something sexual about it all the same, she could pretend she was pushing back against a cock... if she squeezed her thighs together right at certain movements, she could almost feel it. Almost. Imagination was still no substitute for the real thing. Even when she snuck a rub of her crotch into the dance, it wasn't nearly what she wanted.

Finally, Stacey seemed satisfied enough to do a run actually on video, but two changes came up before they begun. First, Dana wanted to take off her glasses. She couldn't see well without them, but if this was going on YouTube, she wanted to look her best.

The other change was Stacey's idea, but Susan's heart started to thump when she saw the girl retrieve a marker.

***
Chapter Thirty-One:

Stacey uncapped the marker and explained, "It's a Pussycat Dolls song, so... we should look the part, right?" Dana shrugged. "I only have one set of cat ears," she went on, pausing momentarily to grab a headband with yellow and black cat eats from her closet, then, after placing it on her head, went to the mirror and picked up the marker again, "But the rest of us can do this..." Stacey only drew a dot on her nose and three streaks going across each cheek, to represent a cat's whiskers, and Susan calmed down, feeling silly for her instinctive reaction. It wasn't a magic marker, it was just a normal one. Still...

"No, don't," she said when Stacey came at her next with the uncapped marker. "I don't want to wear that all week!" Not because of the embarrassment... but it would be a giveaway to her brother and parents that she left the house. Or at least that she got very bored and silly. Maybe she could convince Keith it meant she wanted to play games with the leash.

It turned out her worries and planning for them wasn't even necessary. Stacey shook her head and rolled her eyes, exasperated. "Don't be stupid, it's washable." She dropped some moisturizer on a kleenex from her dresser, then wiped her face, and indeed, one of the streaks disappeared. "See?"

"I don't think the Pussycat Dolls actually, like, did cat themed stuff," Dana pointed out. "You might be thinking of that old movie Josie and the Pussycats."

Stacey whirled on her with the eyeroll, now letting out an frustrated breath. "It's an inter-pre-ta-tion," she said, and then went to redraw her lost whisker staring at herself in the mirror. "It'll look cute if it's all three of us, come on."

Dana and Susan exchanged a look, but finally Susan shrugged, and let Stacey draw on her face. While Dana was getting hers done, Susan looked in the mirror. The marks looked much the same as the hidden ones on her body, like the one that said "Fuck toy." What would happen, she wondered, if it was the magic marker? Would it actually turn her into a cat? Or make her think she was one?

Good thing it's washable, she decided. Keith might draw over it just to see.

She watched her own eyes widen in the mirror, almost before she was conscious of the idea that thought sparked in her, growing steam.

As long as Keith kept refreshing the marks, she was a prisoner of the things he wrote. But... what if he didn't refresh them? What if he thought they didn't need to be, because they still looked dark, because Susan drew over them with a non-magic marker?

It wouldn't solve her problems... the 'Jerk' mark was the one causing the most trouble, and that one was on Keith. She couldn't draw over it without him realizing. But... maybe he just wouldn't think of it if every other mark was fresh? At the very least, she might be able to get out of being super horny and addicted to cum... she might still have to pretend, but how hard could that be?

It was a plan... she wasn't sure yet if it was a good plan, but it was a plan, one of the first she'd had since all this started that had any chance of helping.

"Earth to Susan," she heard, and then looked away from the mirror towards the other two girls with cat-whiskers on their faces. Dana looked amused, Stacey annoyed. "Are you ready to go?"

The first attempt was just bad. They weren't very in synch and Dana, thrown by the sudden change in her ability to see, stumbled into both of them at one point or another. Two attempts later (the next attempt ruined because Dana tried to emphasize "boobies" over "groupies" again) it was finally good enough for Stacey... which still didn't mean it was up to any professional standard but it had a certain rough charm. "I'll fix it in editing, use the best of all three," she said, but really there were six, as Stacey not only recorded from her computer but also recorded video from her phone. Even taking the best of all of those, Susan couldn't imagine many people wanted to watch their video, unless her audience consisted solely of perverts masturbating to preteen girls dancing. Still, she breathed a sigh of relief that they were done... she was getting really sick of that song.

The relief lasted until she clicked to the lyric search engine and said, "Let's get practicing on the next one."

"The next one?" As it slipped out, it sounded awfully lot like a whine, which earned her a glare from Stacey. Fuck it, she thought. "Can't we do something else?"

Dana backed her up. "Yeah, at least take a break for a while. I'm pooped." Susan wasn't... she still felt keyed up, energetic even, but dancing wasn't what she wanted to do, wasn't good enough anymore. But Dana wasn't super-horny, and despite her tall thin frame did not have a lot of stamina. She couldn't make girls basketball even with the help of her growth spurt.

Stacey took the idea of a break a little better coming from Dana. "Like what?"

"We could.... I don't know, do facials maybe?" Dana offered as she put her glasses back on. Susan's ears perked up... since she'd become a fuck toy she now knew that facials also meant when somebody covered your face in their cum, something Keith tried to do sometimes but her cocksucker nature got in the way. At Dana's suggestion, Stacey shook her head with a grimace and for a second Susan wondered if she, too, knew this other meaning, pictured a thick cock squirting off on her face and trying to picture whoever might be behind the cock, but then the girl said, "Amateur facials can make your skin break out even worse. I go to a professional aesthetician."

Dana pressed on, undaunted. "Or go on your trampoline for a while?"

"I thought you were tired." Her gaze was suddenly suspicious.

"It's just bouncing. You don't get tired bouncing."

Stacey rolled her eyes, deciding it was ignorance rather than a lie. "Obviously, you've never done it. We do that and you won't ever want to do my other video." I don't now, Susan thought. "Maybe sometime after lunch."

This was her chance, Susan decided. "We could play Truth or Dare." She'd had it worked out... she'd choose Dare every time, obviously... Truth could only get her into trouble. And when they asked for Dares, she'd push the game more sexual, get them to masturbate until they cum, hoping they'd turn that dare back on her. If they dared that, it had to count as permission too, right? If not, she could ask while she was rubbing her pussy, if she's allowed to cum and hope they say yes. Or, if all else failed, she could dare them to tell her she could cum. The only worry was if they got her to strip down, saw the marks on her body, but she could just claim that it was from a previous game and...

Stacey interrupted her running through the plan one more time with a flat dismissal. "Truth or Dare's a bad game," she said as she leaned back over the computer, evidently deciding that after shooting down three ideas, they were moving on to hers. "It just makes people do things they're uncomfortable with."

It looked like Dana's eyes lit up at the suggestion, even if Stacey refused it, so Susan pushed a little. "Sometimes it's good to push your boundaries though. You know, get outside of your comfort zone." Maybe have a friend cum in front of you. "It could be fun."

"We're not playing Truth or Dare," she said. "This is my house, and I don't want to."

"Besides, Truth or Dare's only really fun when you're playing with boys." Dana had that smug half-smirk that she'd been wearing more and more in recent months, since she started developing and getting a share of the attention that less geeky, more popular girls, the ones with really pretty faces, got.

"We can find a way to make it fun," Susan said, but Stacey interrupted her halfway through.

"What, you've been playing Truth or Dare with boys lately?"

"Wouldn't you like to know?" But Dana couldn't keep a secret. Now that she got attention from boys, she also got a different kind of attention from the less-developed girls, who started to assume that if boys were looking, she knew something they didn't, and she may have loved that attention even more. Even though Stacey had a boyfriend, Dana had her hooked and knew it. Before the marker, Susan probably would have been hooked as well, listening with rapt attention. Now, she was simply curious and watched as Dana shrugged with false modesty. "There may have been a barbecue on my street and I may have played some with a couple boys I know."

"Who?" Stacey asked.

"Bobby Laird, and Travis... something. I don't know his last name but he's a year ahead of us. And Bobby's older sister. It got a little wild." The word 'little' was stretched out at a higher pitch, teasing with the idea that it may have gotten REALLY wild.

Stacey took the bait. "How wild?"

"Welll... I got dared to show my boobs pretty early." She used a thumb to tug at her shirt just enough to expose some cleavage, even standing up. "And later I let them feel them. I mean, Bobby and Travis, Bobby's sister didn't want to. Bobby pinched my nipple." She broke into a brief fit of giggles at the memory.

Susan watched impassively, knowing Dana, waiting for her to get to the good part, while Stacey's nose was wrinkled up. "I can't believe you let them do that," she said. But of course, it might have just been jealousy... Stacey didn't have anything worth grabbing. Then again, Susan reflected, it still felt pretty good even if there was nothing there. You should try it, she thought.

Dana shrugged, not getting put off by her friend's lack of positive reaction. She liked any reaction. "And, Bobby's sister made him and Travis kiss on the lips."

"Gross," Stacey said.

Dana merely shrugged as if she didn't find it gross at all, but knew tastes varied. "Then I had to hold Travis' dick." Stacey's mouth dropped.

The last time they hung out, Susan might have been doing the same thing, but now she just held her reaction, waiting for the big reveal. "And?"

When it came, it was disappointing. "It was bigger than I expected," she said. "I know they were going to ask me to suck on it, or on Bobby's, next dare, but... then the burgers were done and we had to stop or someone would have come looking."

"You are so lucky the burgers were done in time," Stacey said, still shaking her head in astonishment. "So you didn't have to."

"I don't care, I would totally have done it," she said with a casual shrug, and locked eyes with Susan like she was craving the same kind of surprised adoration of her daringness that she might have given before.

Instead Susan burst out laughing. That was it?! That was the good part of the story, her daring summer experiment into sexuality? It wasn't even something that tempted Susan to masturbate, and she was super-horny. And she laughed again at that.

To think, I used to worry she was going to leave me behind for boys. She's more of a kid than I am, she thought.

For as long as she remembered she looked up to Dana. Even though she was considered a geek, Susan wasn't much better, and Dana was always the daring one, the one who wasn't afraid of looking stupid because people already made fun of her. And, in the months since Dana's body began developing, leaving Susan behind, that feeling seemed to growing more intense, even being sometimes outright envious. For months, Susan thought of herself as a kid, while Dana was a woman, or at least a woman-in-progress, who got her period first, who got boobs first, who was now taller than her, and it seemed like she was shifting into being less of a friend and more of a mentor, someone who knew about porn and boys and who seemed to be so much more experienced in everything sexual, someone she could live vicariously through while Susan bucked up her courage to take the same steps.

Except she wasn't more experienced, Susan now saw. She wasn't even a woman, despite her body. Dana was still a little girl, just taller and with boobs. And Stacey, who'd intimidated her with her popularity and firm opinions about everything and had an official boyfriend (albeit one she claimed she did no more than hug and who was staying with his dad all summer), she was even worse. They were both practically... innocent.

Susan had more experience than both of them put together. She'd already had pretty much every kind of sex, with her own brother no less, done lesbian sex, been in a threesome, had cum inside and on her, wasn't even afraid to use vulgar terms because she'd done things more raunchy than anything she could say. For these girls, her friends, sex was a mystery, an adventure and even when they finally got around to having it, it would probably stay that way for a while. But Susan, she was a fuck toy, sex was just a part of her life, a need, like food and water and air. And even if the markers managed to fade, and she wasn't forced to be a fuck toy, she might be one by choice, just because she enjoyed it... but she'd never go back to listening to whispered confessions and wondering what it'd like to be daring. Her innocence was gone.

One more change that was indelible.

"Sorry," she said finally, that sobering thought, as well as Dana's perplexed expression helping the laughter subside. "I was just thinking how they probably felt it was totally unlucky to stop then."

Dana grinned back, her braces glittering, and she pushed her glasses back up her nose. "Yeah, I'll bet!"

A dark part of herself thought about dragging them over the line of innocence herself, use the Truth or Dare game not just to get herself off but to bridge the gulf between her and her friends by pushing them into being fuck toys as well. But that, too, would be indelible. Let them have their innocence.

"Well, my boyfriend respects my body. He'd never even think about asking me to do something disgusting like that."

"I don't know," Dana said. "I bet he probably thinks about it, he's just too shy to ask. Right?"

This was directed as Susan, so she shrugged. "I don't know. You don't always know you want something until you try it." Like being treated like a fuck toy. "And I don't think he's gotten to try it." He did seem too passive and agreeable... the kind who might have gone along with it if someone offered it but would never ask for it himself. That was almost how Eli and Stacey started dating... he hung around with an obvious crush doing everything she asked until she finally asked him to go out.

"Maybe he's getting one right now. With someone he met on summer vacation."

Dana's speculation was met with a glare that could have instantly boiled water. "Shut. Up."

"Relax, I'm just teasing you. We all know he wouldn't."

Unless he met a girl who pushed him around like Stacey did and also wanted do to sexual stuff, Susan thought. "Probably not."

"I'll tell you what thought if I try it out... with Travis or Bobby, not Eli, I mean... I'll let you guys know how it is, maybe it's not so bad. I mean, it can't be if girls keep doing them right?"

It was really hard for Susan not to give her expert opinion, but Stacey saved her again, "Can we talk about something else, please? Like, something not perverted? I'm a Christian, okay?"

"So what," Dana said. "So am I. Anyway, Travis has my Snapchat... I don't want to message him, but who knows, if he contacts me, maybe I could have a real boyfriend by the time school starts again. We could double date." Her eyes softened as they fell on Susan again. "We could work on finding someone for you, too."

"You really don't have to," she said, and Stacey nodded in satisfaction, like she approved, or maybe the answer had confirmed something she suspected.

"Come on, we're wasting valuable video making time here. I've got a new song picked out." And so Stacey took charge again, quashing once again Susan's hopes for a way to cum, but she went along with it trying to plan her next move, thinking maybe of bringing up masturbation as a way to not fall into sex. Even though for Susan it seemed more as a way to get ready for sex, the discussion might lead to a way for her to demonstrate and ask if she could cum.

Then Stacey once again said something which threw off her plans. "You should change."

"What?"

"Change your clothes. We should all be wearing shorts. I think I've got something like what Dana's wearing, only in your size. That way you look the same. And you'd be like, my backup singers." Which didn't make a lot of sense, because the song was "Milkshake" by Kelis, which didn't really have other singers. The video had other dancers, sure, but Stacey didn't seem like she cared much about being close to the video.

She dove for her closet again, first looking through her shirts, although before she found something for Susan, she found a new shirt for herself, blue with an abstract beach design. She darted towards the door to give it one more shove, more to confirm it was closed than anything else, then stripped her top off and replaced it with the new. Then she looked to Susan again and said, "Right..." and went back to her closet. Soon, she found a white tank top and tossed it towards Susan.

Susan caught it, automatically, then exchanged a look with Dana, who shrugged and said, "Come on, it'll be fun matching," but Susan was all-too-aware that they never would. Not just because Dana was taller and with boobs, but because any clothes that were similar enough would also expose the letters on her skin, the fuck toy brand across her chest, or part of Cock Sucker at least.

"Here," Stacey said finally, holding up a pair of white shorts with trim that was only slightly darker than Dana's and legs way too short to keep her nature as a cocksucker a secret. "I knew I had shorts like this." A second later, after noticing Susan made no effort to get moving, she added, "Well? Go on, change..."

It was one thing to show that off in an effort to finally cum, but quite another to do it just for one of Stacey's stupid videos. So she found her voice and said, "No."

"No?" Stacey repeated, sounding like she'd just been personally insulted.

"No. I like what I'm wearing. I'm not changing just to be in one of your... videos." Her voice was more acidic than she thought it was going to be, and she almost said "stupid," or something worse, before videos. Maybe being horny so long made you angrier too.

"It's my video, it's my artistic vision. You wear what I want you to, or you don't get to be in it."

"Fine!" This whole plan seemed to be a bust, Susan decided, maybe being kicked out of Stacey's house was the best thing that could happen.

Except it didn't. They stared at each other for a few seconds, then Dana edged over to Stacey's side and whispered something in her ear. Stacey's eyes widened a little, and seemed to look down on Susan's body, but her anger faded and, as she suddenly turned away, Susan thought she saw a blush. "Okay, whatever, then you can sit it out and watch us. You're not that great a dancer anyway, and I can probably make it work with just me and Dana. In fact... I can do it even better!"

The crisis seemed to have passed with whatever Dana said and Stacey's excitement in her new idea. Susan thought about leaving anyway, but instead she lay on the bed, watched them practice a bit, and helped them do one 'take' by holding the phone. Stacey's new concept seemed to be making the song a sort of competition between Dana and her, over whose milkshakes brought the boys to the yard, though Stacey wanted the camera on her mostly, because the video was her putting Dana's character 'in her place'.

It was boring, but at least while she was watching she could squeeze her thighs together and at least stimulate her pussy which was starting to get slick and aggressively needy again, but when Stacey wanted to do another take, this time with her holding the phone to take selfie-shots, Susan just wanted to leave and find something to shove up there.

"I'm hot," she announced. "Can I maybe get something to drink?"

"Yeah, sure," Stacey said. "That's a good idea, actually. There's some cokes in the kitchen, bring one up for each of us."

As she pushed herself off the bed, she added, "I may be awhile, I also gotta use the bathroom." Maybe someone left a hairbrush in there. Or has a vibrating toothbrush. Or if not, there was always the coke bottle, depending on the size. As she left the room following Stacey's dismissive wave and heard hushed giggles seconds later, she decided if she did that she'd use Stacey's bottle, not her own.

She descended to the first floor and found her way to the kitchen, letting the song, that was already worming its way into her head, recede into the distance. The kitchen was not only bigger, but also cleaner and somehow more impersonal than the one in Susan's home. Wooden cabinets and surfaces that appeared to be stone made the room look like something out of a magazine, rather than somewhere someone lived... except for one unwashed glass on the counter by the sink, and a cutting board inside, and the plates where the ingredients for their promised lunch was just recently prepared and waiting for final cooking.

That was a plate of chopped peppers, onions, and tomatoes, and a second plate of cut but uncooked slices of steak, a sealed bag of shredded cheese between them, atop another bag of soft tortillas. It looked appetizing but wasn't exactly what she was hungry for.

Stacey's dad was nowhere in sight.

Susan opened the fridge, pulled out three bottles of cola and tucked them under her arm, then wandered the first floor, not entirely sure what she was looking for, just looking, perhaps for a bathroom, perhaps something else.

What she found first was not the bathroom, but rather a small room off to the side of the house, door closed but not completely. She would have passed it by entirely except she heard a particular clicking that she recognized as someone using a mouse.

The urge to see what he was doing snuck up on her, but she found herself standing by the door. Too polite to barge in, despite her interest, she called out, "Mr. Mancuso?"

***
Chapter Thirty-Two:

A brief soft bang and sounds of things shuffling around took up a few seconds, and a few more clicks of the mouse, before she heard a tremulous "Yes?" from inside the room.

Susan pushed open the door. Stacey's father sat in what looked like a home office, behind a desk with a laptop. He looked up at her with an expression that was almost... spooked? But also like he was trying to hide it, pretend everything was normal. "What can I do y... do for you?"

The first thing that popped into her mind, at least the first thing that she thought she could say, was, "Stacey wanted me to get some drinks." She used her free hand to indicate the bottles under her arm. "But it's your house so I just wanted to make sure it was okay with you?"

He smiled, weakly but genuinely. "That's very considerate of you, but be my guest."

"Okay." After a second, she added, "Could you show me the nearest washroom?"

He leaned forward as if to stand, but then relaxed back and said, "You'll see it if you go out and take a right."

"Thanks." But for some reason she didn't get moving. Instead, she asked, "So what are you doing?"

"I was just... watching a funny video a friend sent me."

Susan stepped forward, put the bottle in her hand on the desk, then did the same with the others under her arm, and circled around to the back of the desk. "I like funny videos, can I see?"

It was like she'd startled him, the way his body tensed up and drew back from her, and his hand jerkily moved the mouse as though to make a last minute change. "Uh, no, it's actually a little inappropriate... adult humor."

Susan didn't stop approaching, and soon she was standing beside him and looking at the screen. By then, the web browser had been completely shut off. That seemed like overkill for dirty jokes but not for something else. "You were watching porn." She wondered if it was one of the ones she'd seen.

"No!" he insisted, but as she looked down, she noticed a fold in his loose shorts was jutting out in an unnatural way, an erection that hadn't fully gone away.

Beneath the shorts was a cock, and Susan that was just what she needed, and so she leaned over him between him and the desk and pulled his waistband down. Porn always seemed so unrealistic, but in one way it was just like one of the ones she watched... he didn't even struggle, just said, "Hey, wait, you can't..." But she could, for he didn't even move... all it would have taken was one of his strong arms pushing her firmly away, or standing up and backing off, but he was willing to let it happen. The only attempt to stop her came verbally, and he didn't even sound very convinced by the words that came out of his mouth, and by the time they were out, the throbbing cock was in her hand, and then she couldn't stop it if she tried. She was a cocksucker. Even if this was the first and only cock she'd sucked other than her brother's.

Once she'd made first contact, he finally moved, too late to stop it. His hands hovered over her head, like he couldn't decide whether to try to push her away or guide her. But she didn't need guidance, the thick meat was easy to slide down her mouth again and again, especially when her slobber covered it. It was, she noticed, thicker than Keith's, but not as long. She didn't need to use one of her hands to stroke, but she did anyway, at least when she was sucking back on the head. "God, what are you doing, honey?" he asked, but it should have been obvious. Maybe he'd never had a blowjob before... he had to have had sex, but sex didn't have a tongue that was also working, sliding around the shaft, and so maybe that was what he was asking about. But she couldn't answer. "This is so wrong..."

It didn't feel wrong, or at least not much. She felt a little ashamed that it wasn't Keith, a niggling belief that that somehow made it wrong, but the act itself, it was just in her nature, a need, more than anything else. She realized that she'd come looking for him for exactly this reason, it was why she was so interested to see what video he was watching, to be in a situation where she could just... satisfy that need. She just didn't realize it at the time... that was one thing she was still discovering about being horny, sometimes it made you do things without entirely being conscious of why.

The need wasn't even fulfilled, although she was closer than ever, and maybe her addiction to cum would be satisfied soon, but she needed more than that. She turned his chair, without taking her lips off his cock, so she could kneel in front of it more comfortably. He didn't resist, just looked down at her head with a mixture of fear, shame, and excitement.

While looking up at him into his eyes, she slid one free hand into the stretchy pants and started rubbing the hot wet center of her need, the hungry drooling beast that had been teased all day and was now roused fully aware by the chance to finally be satisfied. "Can I cum?" she asked.

Or tried to ask, anyway, for she couldn't stop sucking his cock, and the words were muffled through the thick slab, and he must have heard another question through it. "No, don't stop, it's just... god, you're my daughter's age." His hand finally touched her then, a gentle stroke up the side of her face and hair, but after looking for a second, he looked away.

Susan rubbed herself harder, and bounced herself up and down on her shins and heels as her head bobbed enthusiastically, hoping he'd get the point and give her permission, or outright tell her to cum for him.

Just as she was about to try again to ask, open her mouth enough that her words might be made out even though she was still sucking, she felt his hands on her head again, but this time far less gentle, instead, he held her in place as he thrust his hips up towards her, forcing his cock in as far as it would go. No words could escape then, just a moan of need and a tumbling series of thumps.

That last wasn't from her, she realized, or him, but rather from upstairs. "Oh god," he said, as an unpleasantly bitter taste spread across her tongue, and Dana and Stacey descended the staircase, laughing.

"Shit shit shit," Mr. Mancuso said, barely even a whisper, as Susan sucked down more squirts from his spasming cock and swallowed hungrily, despite it not tasting anywhere near as good as Keith's, feeling at least some of the overwhelming tension leave her body as her addiction was fulfilled. She might still be super-horny, but the underlying nausea and panic she'd been holding down had faded.

It wasn't her addiction that held her nursing on that cock, rubbing herself in the faint hope he'd say the magic words, even though Dana and Stacey could be heard talking in the kitchen, wondering out loud where Susan went, and quite possibly about to walk down the hall and through the still open door at any moment. It wasn't her horniness either, although she was horny enough that she wouldn't care if they caught her if only it would lead to her orgasm.

She was still a cocksucker, with a cock in her mouth... what else could she do?

Mr. Mancuso was far more concerned about getting caught, though, and when he was done squirting and it didn't look like Susan was going to let go, he pushed her away, first gently, but then, in rising panic as the voices of his daughter and her other friend grew closer, gave Susan a shove so hard that she fell backwards.

While he stuffed his cock back into his shorts, Susan reluctantly removed her hand from her own pants and pulled herself up by the edge of the desk. Stacey's dad stared at her, wide-eyed, with a pleading or terrified look on his face, while Susan merely licked her lips just in case she'd missed any cum, seeming completely unbothered by being about to get caught together... which was an illusion, for her heart pounded and thighs trembled, but they were doing that before and she wasn't sure how much was fear and how much was need.

The other two girls appeared a second after Susan stood up, while she was still wobbly, but they didn't seem to notice. "What are you two doing in here?" Stacey asked, but she didn't seem particularly suspicious.

She should have been, if for nothing else than by the red flush on her father's face, not to mention his difficulty thinking up a good explanation. "Umm, your friend her was just, ummm, giving me a hand with something here..."

"Yes," Susan agreed. Her hand was involved, even if it wasn't doing most of the work. Going with honesty worked for her. "I was helping him with something hard."

"So, you girls ready for lunch?" His words rushed out like he was afraid she might get too honest if he didn't change the subject. "I just need to cook up the steak slices but that won't take long."

"No, actually," Stacey said. "We were just wondering if you could make us milkshakes?"

"Milkshakes?"

Dana explained. "Yeah, since we're doing a song about milkshakes, it only makes sense we have one, right?"

"Please, Daddy?"

"Uh, sure, just give me a minute here and I'll make you milkshakes. Uhm, Sara, why don't you go with them?"

It took a second before Susan realized he meant her. "It's Susan."

"Oh, right, sorry." He shot her an apologetic look, with that hint of pleading that she'd seen so much of lately, so she circled around the desk, grabbed the cokes and passed them around, then followed her friends out to the kitchen, where they, in lowered voices that were not quite whispers, continued a conversation they were having while she was sucking cock.

"Anyway, I'm telling you, he's totally got a crush on you. You should flirt with him a little, see what happens," Dana suggested.

"Uh, excuse me?" Stacey said, her voice raising for the question but then falling again. "I'm taken, remember?"

"So? It's just flirting. Besides, it's good to make your boyfriend a little jealous. If he doesn't get a little angry, how do you know he cares? And who knows, maybe this guy..."

"What guy?" Susan finally asked, her curiosity getting the better of her.

"Just this guy who comments on ALL of Stacey's music videos. He really likes her."

"He's just a fan," Stacey said dismissively, but the look on her face revealed how flattered she was at the idea that someone liked her enough to comment on all of her videos. "My biggest fan."

"More like biggest groupie."

"He's NOT a groupie."

"Well, he probably wants to be."

"He's probably like, some old creep or something," Susan pointed out, knowing it was hypocritical considering she'd just sucked off a guy old enough to be her father.

"No, we saw his picture," Dana said. She popped the top off her cola and took a swig. "He's our age. And he's cute."

She rolled her eyes. Even without the life experience the last few weeks had given her, she knew that a picture didn't really mean anything. If she was going to suck Stacey's dad off, the least she could do is warn her in case he was a murderer or something... she didn't really care if he was just a pervert, Stacey might benefit from being thoroughly felt, like Susan had been, but how would you know? "You do what you want to do, but... you know, you can't really be sure, I mean, it's easy enough to fake."

"What's easy enough to fake?" her dad asked, walking into the room. He seemed calmer, though his eyes followed Susan warily like afraid she might have told them something.

"Nothing." She sounded bored, but both Susan and Dana could tell that this was one of those things Stacey didn't want her dad knowing. "Just an idea for the video. But it's not going to happen anyway." This was directed more at Dana than anyone else, firmly shutting down the idea of flirting with her biggest fan.

Her father didn't seem interested in pursuing it, turning to the freezer. "So you want milkshakes, is it?"

"Yeah. We should still have chocolate left, right?"

"Unless you ate some since last night. But are you sure you wouldn't rather have lunch first?"

"Actually, I am kinda hungry..." Dana said, looking over the fajita mix.

Stacey let out a little sigh but said, "Fine, I guess I am too. We'll eat first and have milkshakes after."

***
Chapter Thirty-Three:

Stacey's dad retrieved the chocolate ice cream and put it on the counter so it would soften, then returned to his pre-assembled ingredients. "I'll just quickly cook up this meat, and then you can build your own fajitas with whatever you like on it."

"Sounds great," Dana said. All three of them took seats around the kitchen, not talking much because the presence of a parent always made it difficult. You never knew when you might say something to get someone in trouble. But Dana didn't like silences, so she spoke up eventually. "So I hear you're not working anymore, Mr. Mancuso."

"For the moment."

Stacey piped up to defend him. "It's not like he lost his job or anything."

"I know."

"His company got bought out. For a lot of money."

"I know, Stacey, geez, I wouldn't have brought it up if I thought he got fired. I was just wondering if he's like, going to retire or..."

"Oh, no," he said. "I just don't have it in me to retire, I'm still young, you know." The girls exchanged a dubious look at that. He was a parent, by definition old. "I figure I'll take a little time off as a vacation, then maybe try to find something I really enjoy. I still get a percentage off the patents from my company, so I don't need to make as much to stay where I am."

"Yeah, Stacey said you invented something that's getting used all over. What was it?"

"There are a few things, actually, all industrial uses. The most popular is a type of liquid extruder head."

"What's a liqu..."

Susan cut her off. "It squirts out goo." Susan and Stacey's dad locked eyes then, for a moment, and she blushed, while he turned suddenly away to stare at the frying pan.

"Uh... more or less. But in a patentable way that nobody else can use unless they pay me. See girls, it always pays off to find head work, not muscle work." Mr. Mancuso seemed comfortable again now that he was doing a dad thing, cooking and offering advice.

"Or fame work," Stacey said with a snotty self-assurance. "Like me."

He looked pained, like he didn't want to step on his daughter's hopes and dreams but secretly thought it was idiotic. "That's a good thing to aspire to," he told his daughter, "And I know you have the talent to be famous, but a lot of luck is involved in fame, and you can't count on luck. You've gotta think beyond that."

"Susan's not going to have any trouble getting head work," Dana said, and Mr. Mancuso's head snapped up again. "She's always writing, it's like her brain never stops moving." She felt a rush of pride at her friend's faith in her, and then shame from the realization that she hadn't written very much since her brother turned her into a fuck toy, except a story about that. Her brain lately has only been moving in circles around sexual topics. "Me, I just want to do something with animals." Sex with animals counts as something, Susan's horny brain said. "Speaking of animals, how long till that's ready?"

"Not long now. Working with animals is a noble pursuit. Rarely pays well though." Someone would probably pay to see, Susan thought.

Dana shrugged. "So I'll make sure to marry rich. Know anyone who might be interested?" She gave her open mouthed grin until he looked towards her, laughed and added, "Kidding. I don't know, I'm sure things will work out somehow. It's a long time before we have to worry about things like that." She took a swig of her drink.

"Not as long as you think. You girls grow up so fast, never too early to start thinking ahead."

"Right now I can't think past lunch. I'm so f... dang hungry."

"Well, it's just about ready if you want to start assembling things."

Stacey got up and got the food, then the plates, and took the first tortilla and started to lay on cheese and other toppings. Once she was done with them, the other girls could start theirs, and soon Mr. Mancuso put the meat into a large bowl with a large silicon spoon for easier distribution. Again Stacey took the first scoop to fill her fajita, before passing it over to Dana who was practically bouncing.

"Man, that looks so good. I can't wait to get your meat in my mouth, Mr. Mancuso."

Susan was the only one looking at him as he nervously put a hand over his face, starting at his nose, and squeezed down towards his chin and remembered her brother's joke at dinner the other day. Was Dana trying the same kind of smutty joke? It didn't seem like it... if she was, she was more subtle than she'd ever been before. But it was sort of fun the way it flustered Stacey's dad anyway. Noticing the large amount of sour cream Dana had put on when she looked down, she got inspired and added, "You're going to get a gooey mess squirting out if you don't wrap it right." She fought back a smirk as she glanced up to see him staring at her again with that near-panic expression.

Dana laughed, but not like she got the joke, but instead like she just thought of her own. "That's okay, we've got a liquid extrusion head expert here. I'm sure he could help."

The expert didn't seem interested in helping... they must have pushed him too far, since he seemed like he wanted to make a quick exit. "Okay, so, you girls enjoy the meal, I need a few minutes in my study."

"But what about our milkshakes, Daddy?" his daughter whined.

Halfway out of the room he said, "I'll just be a few minutes, then I'll come back and make them for you."

Stacey sighed a little then said to her friends, "He'll probably forget," but then that thought itself was forgotten and she dug into her meal, as did Dana and Susan.

It was a good meal, though Susan couldn't help but think about her brother... not because it left a gooey mess in her mouth (she didn't overstuff it), but because it was something that he could easily make now that he was a good cook. Maybe it was even a little too simple. And she felt a little guilty, like she should be eating his cooking instead of someone else's, and then angry for feeling guilty because he wasn't there to cook lunch for her at all, he was out with Trish. Doing things that he should have been doing with her... so why shouldn't she do the same, without feeling guilty?

Yet she felt guilty anyway. She ate her fajita slowly, enough time for Dana to go back to make a second one, and spaced out of the conversation the two of them were having, which was something to do with people on a TV show and occasionally dipped back into plans for their video.

Stacey's father did return a few minutes later, his shirt flecked with dark spots that looked like he'd just washed his face and was a little sloppy about it, but otherwise seemed normal except for alternating between avoiding looking at Susan at all, even when his gaze might naturally go that way, or taking sudden direct looks at her. The latter type happened mostly when he had an excuse to not be looking at any of them at all, when he was making milkshakes, pouring ice cream and then milk in a blender.

Dana attempted to say something through the bite of her second fajita she was chewing.

"He can't understand you with your mouth full," Susan said, even though she thought what Dana said was relatively clear. And that was the first time he threw Susan a lingering look for no good reason... or at least, what nobody else would understand was a good reason. Susan assumed he was thinking the same thing she was... that she knew from experience how hard it was for him to understand a girl with a mouth full.

The taller girl swallowed, then repeated herself. "Don't use too much milk," she suggested. "I like it nice and thick and creamy."

"Don't worry. My Dad knows how to make it creamy." He flinched both at Dana's comment and Stacey's response... Susan was beginning to feel a little sorry for him, but it was funny.

While the milkshake was in progress, Dana made another try for what seemed to be one of the reasons she wanted to come. "Maybe if we're going outside to film anyway, we could all play on the trampoline a little. It might even make a good scene for the video. I mean, not while we're actually holding milkshakes, obviously."

"No, today's not the right day for it," Stacey decided firmly. "Too humid."

"Sometime soon then. Maybe this weekend, it's supposed to be nice. I could bring my bathing suit." Dana wiggled her upper body as though being in a bathing suit was somehow like dancing, and then finished, "and we can do that sprinkler thing you mentioned."

"Can't this weekend," Stacey said, though she didn't sound disappointed at all. "We're going out of town to visit my grandmother."

Her father's neck jerked up, as he said casually. "Not me though. I'm staying here. I'm going to be all alone all weekend." His voice sounded forlorn, but it was combined with a sudden intense look right at Susan, intense gaze that she felt like was an invitation. The other girls weren't paying attention, and she broke eye contact so whatever moment would pass more quickly. He went on and, as though nothing had happened, passed Stacey her milkshake, then went to get started on the second. "If anyone dropped by looking for Stacey they're going to be disappointed, since it'd just be lonely old me." Another look at Susan, though this time quicker, and she didn't let him lock eyes. This weekend, her brother would be home. Or at least, he had better be.

"You're not fooling anyone, Dad," Stacey said, taking a small sip from her milkshake, but just a small one... she obviously wanted to save it for the video and yet couldn't resist trying some. "You're probably going to have the time of your life and have a poker game or something. If you really missed us that much, you could come along. You just hate Grandma."

"I don't hate your grandma," he said over the whirr of the blender. "We're just both very strong personalities so it's better if we just stay away from each other." Stacey shrugged, and took another drink, but this time from her nearly empty Coke.

"Maybe I could drop by and try the trampoline out this weekend, then, since no one will be using it." Dana said, but after a glare from Stacey, she added, "Relax, I'm just messing with you, like, why would I come here alone? Not like it's any fun bouncing by yourself. Besides, my parents might be taking us to like a water park or something, maybe."

The second milkshake, once completed, he passed over to Dana, and Susan could see that she was obviously next, so when he reached for the ice cream again, she said, "None for me, thanks." To tell the truth, she was a little offended... she sucked his cock, and sure, maybe he'd take care of his daughter first but at least she should have gotten offered one before Dana. But that wasn't the real issue.

"You sure? It doesn't have to be chocolate, if you don't want."

"No, it's okay. I think I'm actually going to go home."

"Really?" Stacey asked, rolling her eyes. "You practically beg to come here and you want to go home already?"

"I'm not feeling well." If you counted horniness as an illness, it wasn't even a lie. Though the rest of it was. "Maybe it was something I ate." Her eyes darted to Stacey's dad. "Before the fajita, I mean."

Dana nudged Stacey and leaned in to whispers something to her, all while wearing a smug look on her face like she had just proved some point, and that filled Susan with a cold anger and the thought, maybe I'll suck your dad off next bubbled up through her head, though only for a second. "Yeah, well, if you're not feeling well I guess there's no point sticking around then," Stacey said, seeming less annoyed, and that made Susan wonder if maybe Dana was defending her somehow. "Especially since you don't want to be in my next video."

"Yeah, I know I'm sorry to be missing out on watching you guys, though." She tried not to put much emotion in it one way or the other so Stacey wouldn't be sure if she was being sarcastic or sincere. Sometimes that was better than letting them know.

"Hope you feel better," Dana said, though she genuinely did sound sincere, then lowered her voice a little. "You'll probably be back to your old self in a couple days."

"Maybe." But probably not. Most of the words wouldn't even be worn off by then.

"I, uh, I'll give you a ride... a drive, home," Stacey's dad said, moving to washing his hands of some stray ice cream.

"You don't need to do that, Dad." Stacey said. "She doesn't live that far."

"No, no, I insist. There are a lot of freaks out there."

She wasn't going to say no to a ride, especially since it might help solve another problem. Alone, they'd have a chance to talk, and maybe she could ask him for permission to cum while thinking about the blowjob. Or maybe something else might happen.

They all moved towards the door together, Stacey and Dana because they wanted to go out and film some scenes of the video out in the yard that her milkshake supposedly brought all the boys to, and Susan to collect her shoes to follow Mr. Mancuso into the garage. He hung back from the rest of them, nervous, and once again had moved back to not looking at Susan at all, just opened the cherry-red Jeep SUV with his keyring and pointed to the passenger side as he got into the driver's.

They continued not to talk until he opened the door and pulled out back, passing Stacey and Dana in the yard. Dana threw her a wave, so Susan waved back.

Finally, on the road, he began to speak. First to say, "Where do you live?" After she told him, and he turned the car in that direction, he said, "Listen, about what happened... in my study."

Susan shifted in her seat to face him. "Yes?"

"I'm not that kind of person, I don't know what..." He squinted, and then said, accusingly, "It was all on you, I never asked you, you just... did that."

"Sucked your cock?"

"I never asked you," he repeated.

"I know, I was there." And remembered his hands on her head at the end... he might not have forced her into it, but he was still happy to take control when he got horny enough and just needed to get off.

"I should have stopped you, I was just so... so shocked. But no one would ever believe that... even if they did, it's still unforgiveable." He sounded like he was trying to convince himself, or testing out a story that he might try on others. Finally, he looked aside at her again and interacted with her directly. "Listen, this could destroy my life, destroy my whole family, if you breathe a word of this..."

"I'm not going to tell anyone, I promise." She put her hand over her heart and one in the air, to be extra convincing. He let out a long, deep breath. He really had been scared of that. "I didn't mean to freak you out. It just seemed like you might have a nice cock, and I just couldn't resist sucking on it. And I enjoyed it. I thought you'd enjoy it too."

"I'm not supposed to... Christ, you're my daughter's age. She doesn't carry on like this, does she? With that boy she likes?"

"No, I don't think so. They don't even kiss." Well, maybe pecks on the lips, but real kisses used tongue, Susan now believed.

"But she's a good Christian girl. I mean, I'm not saying you're not, but... some girls are more advanced, you know?" She nodded. Boy did she ever know. "And the way you girls talked..." He shook his head. "Did the two of you come up with this before coming here? Without telling Stacey? Or maybe she knew and didn't care?"

"Huh?" Two of who?

"Girls your age.... my daughter's age... shouldn't act like that." He rubbed his hand down the length of his head, hard enough to pulling at the skin of his face into a weird pucker for a second. "Were both of you girls, like, teasing me or something?"

"What? Both of us?"

"You and your friend. It was like every other thing you guys said sounded sexual. You had to have been doing it on purpose."

"I don't know, some of it from me I guess. But I don't think Dana knew most of what she was saying was dirty. If she did, she would have winked and laughed a lot more. And done this." She opened her mouth in a wide smile, head turned to the side, a parody of Dana's usual expression after cracking some bad pun or dirty joke, sometimes both at once.
He rubbed his face again. "Maybe I'm going crazy. I seriously wondered if, like, both of you were in some kind of competition to seduce me or something."

"No, no competition. I really don't think Dana would even think about that sort of thing with someone her father's age." She was, for all her boasting, too innocent for that. Not Susan. "I'll let you fuck my ass if you let me cum though."

***
Chapter Thirty-Four:

The car screeched to a stop. It was at a red light, but Stacey's dad must have slammed on the brakes instead of slowing to a natural stop. "What?"

Geez, did he need everything spelled out? "I'm still super horny and I really need to cum, and if you say it's okay, I'll let you shove your cock up my ass and we can both cum at the same time." He stared at Susan, but even so, she didn't even feel like she was blushing, despite the incredibly dirty thing she said. It was like, now that cock became a need, like food, it wasn't embarrassing to talk about it anymore, at least with someone who might take care of it. But she had to remember that kind of brazenness would only last as long as her horniness, and it didn't feel normal to everyone else. To Mr. Mancuso, it flummoxed him until they heard honking coming from behind them... the light had turned green and he still hadn't moved. She went on quickly, "I mean, not while we're on the road. I don't want to die and you're already pretty distracted."

He started driving, slowly, cautiously, as though afraid he might make another mistake, and was quiet for at least thirty seconds before saying, "Really?"

That question sounded as positive as an outright yes. She looked down at his crotch, saw it bulging again, alluringly, and her instinct was to look at it, suck it again... but she knew where that would lead, more frustration, so she directed her gaze out the window. "Sure. I love anal stuff, and I won't tell anyone about this, either. If you know a good place to do it."

More silence, but Susan knew he was just trying to think of a good place to go, because he turned in the opposite direction they needed to go to get home. She dropped her hands to her crotch, spread her legs, and started to rub herself through the black stretchy fabric, imagining the coming release she'd been craving. And imagining a few other things, too, things that could go wrong. She had to do this carefully.

Why was it, she wondered, that guys seemed to have so much trouble thinking of the dangers when they got horny? Her brother kept taking stupid risks, and now Mr. Mancuso, he could barely keep his eyes on the road, he kept watching space where legs met and her hand met both and a growing, hard-to-see wet-spot. Meanwhile, she was actually super horny and rubbing herself and still thought ahead, specifically to how she was going to let him fuck her ass without seeing any of the writing. Was this ability to keep her wits while horny a boy vs. girl thing? Or was she just smarter?

She hoped it was the second one, but didn't really believe that anymore. And if they got in an car accident because he was watching her, she supposed she was at least as responsible as him.

There were no accidents, but he drove for a few minutes and then into an alley, where he stopped. The front windshield opened up onto a blank wall, and so did the sides, and the black was tinted, so it didn't seem like anyone could see them. He came up with it pretty quick and it was close to home, maybe he'd used it before when he needed time to think, sneak a smoke away from his family or cheat on his wife or something and knew from experience it was safe and private... or maybe he just chose it on the spur of the moment and anyone might walk by, but whatever the case, obviously, this was the place he wanted to fuck.

Susan, she wanted to fuck any place, and any time as long as that time was as soon as possible. So she undid her seatbelt, then climbed over the divider to sit in his lap ignoring his 'oof' of surprise. Pleasant surprise, judging by the feel of his hard erection firm against her stretchy pants. Of course it was already there when she started the move, and she desperately wanted it inside of her, but her boldness was for a more practical reason than that... she didn't want to risk him taking it out where she could see it and reminding her she was a cocksucker. If she did all this and he wound up blowing in her mouth without letting her cum she was going to scream. She might scream anyway, but this would be the wrong kind of scream.

She clutched the steering wheel to hold herself steady and rubbed herself on him, just to keep him as hard as possible, then pushed back, with her body and back against his front, and started pulling at her pants. A sudden jolt startled her as they both fell backwards, from him adjusting the seat back to give them more room, and then his hands joined hers on her ass, though his were keeping her away so he could pull at his dick. "Jesus, hold on a second," he said.

But she couldn't wait. Her waistband was now down below her butt-cheeks, bare ass against him, although there was no room, she hoped, to see any of the writing.

Another few seconds and she felt something warm and wet graze her ass cheek, and she knew his cock was out and ready, so she reached down to guide it, sliding it in her crack, rubbing the head against her hot aching pussy and almost deciding to just have him fuck her there, but finally pulling it back and pointing it at her asshole.

"Just a second," he said again, breathlessly. "I don't want to hurt you, I need to..."

She later thought he might have been worried about going in too dry, but that wasn't a problem... she had a self-lubricating asshole, had pre-stimulated with an outstretched middle finger while they were looking for a space, and one firm push was all that was required before he was inside her. "Yes!" she cried, and sank deeper.

"Jesus," was all he said, and let her sink, his hands circling her waist, and she started the motion, bouncing, the ride she wanted all along when she accepted the offer to drive her home... but it wasn't what she really needed.

One hand returned to her crotch, slipping in underneath the fabric so she could rub herself more directly and she began to whimper, "Can I cum? Please? Can I?"

Frustratingly, he didn't answer, at least he didn't answer the question. "Oh god you're such a little slut, Sta..." he said, stopping mid-word as though scared, but the fucking continued.

She knew what he almost said. People often mistook Susan for Stacey, from the back at least, and right now, the only way he could see her face was in the mirror... and a quick look up at it saw him not staring back at her reflected face, but directly at the back and top of her head. He didn't look entirely happy either, but rather like there was a deep struggle within him. Was he imagining fucking his own daughter in the ass, she wondered? Maybe all fathers secretly wanted it and just kept it bottled down.

The thought thrilled her somewhere deep inside her, but it was a secondary concern to another question... could this help her cum? He still hadn't given her the permission she needed, after all. "Can I cum?" she asked squeezing down on him. "Please let me cum..." After a second of no response, she added, "Daddy?" hoping it would convince him. "I need to cum, Daddy."

She could feel his body freezing on her when she said it, every part but his cock, which twitched, grew, and again the second time she called him that, and he loosened again, surrendering to it. "I know, baby," he whispered, and his hand groped around her front, beneath the black waistband and forcing her hand out of the way, thick fingers sliding through her crack. "I'll help you. God, you're so wet."

She didn't need help, she needed him to say it. She was so fucking horny she couldn't think straight, and a part of her imagined it really was her own father fucking her ass, rubbing her pussy trying to get her to cum. It wasn't a perfect match... he was bigger, and his voice gruffer, he had stubbier fingers... she felt like her father's fingers would go further inside of her. And he just didn't quite smell right, like Dad, her Dad.
All of that spoiled the fantasy, a little, and her face reddened as she realized that it actually was a full-fledged fantasy now. It wasn't something that popped into her head once while really into it, it was something she was deliberately using to make herself hornier... and it was working, especially the thought that it wasn't because of the marker or anything Keith wrote, it was just that she was just so irresistibly sexy that a father couldn't control himself anymore and he decided to break all the rules and do all the things he secretly wanted to with his own daughter... that thought turned on a little horny light in her brain she didn't know was still unlit. Even if it wasn't really her Daddy fucking her, even if she couldn't actually cum from it until he said the magic words. "Say it," she said, almost a demand more than a pleading, and she was sure she sounded almost like Stacey when she got bossy, which it seemed like she might do even with her own father. "Say I can cum, Daddy."

"Okay, baby," he said. "Cum for daddy." She could feel it then, like a dam breaking in her mind, or a video of a building collapsing, in slow motion, a prolonged moment where you absolutely knew it was unstoppable, and yet it still hadn't descended into chaos and you could observe it as though from outside yourself.

The cock inside of her, the hand in her most private space, protective, possessive, all started to blend together with her racing heart racing she felt everything shake as she called out, "Oh, daddy..."

And in her head at that moment it was her Daddy. She was sure of that, even if she wasn't sure whether she was Stacey or the if cock in her ass belonged to Susan's dad, she was a girl fucking her father... for a few seconds anyway, and then she remembered that she was Susan and it was Stacey's dad who was fucking her ass, and she was no longer as into it. It still felt good... the feeling of something in her butt always felt good, but it was no longer a need, and that felt incredible, but the kind of incredible where you finally get a break from something that had been bothering you forever and can just enjoy peace. The hand of her classmate's father in her crotch, that just felt awkward more than hot, but like a good fuck toy she didn't let him know.

She was letting him do all of the work now, almost, he was still bouncing her, and she was still reflexively clenching her ass around him, and she was sure her fuck toy instincts would kick in again and make her more active, but for the moment Susan was more focused on gaining her breath back and deciding what to do about the cum after. Letting Mr. Mancuso think she was a slut might yet another thing she couldn't wash away, but she wasn't sure she wanted him to see her eating sticky white goo out of her own ass like it was some kind of dessert icing. Her addiction was just satisfied recently, so maybe she could keep it inside until she got home.

Seconds after that decision, his hands clenched against her and the bouncing became more of a jiggle and then another orgasm overtook her, overtook them both as this was his orgasm, him cumming inside of her and her getting a fuck toy orgasm along with it, apparently granted under his previous permission. She leaned forward to steady herself from the sudden assault, hit the horn on the steering wheel on accident, making a loud sound that felt like her own throat made it and possibly drawing someone to investigate, but she didn't care, and he didn't care either, at least not until several spasms of his cock unloaded.

When he was done, Susan noticed how hot it was. Even with the air conditioning on, they were both sweating, and her next to his body was something she didn't want anymore. So she lifted her ass to let him slip out, then pulled her pants back over her ass, and awkwardly slid over towards her side of the car, butt clenched and eyes closed so she didn't get a glimpse of his cock and start sucking him and giving him the idea she wanted to do it again.

"Jesus Christ," he said once they were in separate seats again. His hand was on his heard and his face glossy and it looked like he might be having a heart attack. She hoped not. Stacey might annoy her but she didn't want to fuck her dad to death. "I can't believe I... we... just did that." He wiped his forehead with the back of his hand.

"Thank you, I really needed that," she said, mostly to be polite. She was grateful to get a break from her horniness, but didn't really feel like she owed him... she figured he got paid back by the act itself. "You can take me home now."

He needed another half-minute at least to get himself sorted, and then pulled out the vehicle and they rejoined traffic in awkward silence. At least the air conditioner was starting to make it feel comfortable again.

On the way, he said, "Listen, about... I mean... I don't want you to think... maybe I let you call me 'Daddy' but.... I never would do really anything with my daughter. All that was just... like make believe."

"I know. It's not like I want to have sex with my father for real either," she said, although she knew that was something she couldn't say to Keith anymore, because it wasn't entirely true. At the very least, she was divided on it.

"I wondered if maybe you did already..." She glared at him, got ready to remind him that he was the one who almost called her by his daughter's name first. "Okay, you're right, it was just pretend. Pretending's okay, pretending's fun... just so long as we never ever tell anyone about it, right? I mean, Stacey would never forgive you."

"Believe me, I'd never tell her." Though she thought about it, thinking about the other girl, right now probably playing in her yard making a stupid music video, maybe badmouthing Susan to a friend behind her back, it felt good to know that, if she wanted to, she could destroy her world, smugly reveal that her milkshake brought Stacey's dad to her yard, that she played the daughter he wanted her to be. "I'd never tell anyone." Or she hoped she didn't have to, anyway. Now that the haze of horniness had cleared from her head, she wondered how she'd ever thought she could get away with this without her brother finding out. She couldn't even lie to him. At best, she might be able to avoid the whole truth.

"Good, because if you did... I don't even know what I'd do. But I'd have nothing to lose, you understand?" He looked at her until she nodded, although she wasn't sure she did understand. Was it a threat? Or a plea?

They rode in silence and began to get very close to Susan's house. The driveway was empty, so at least Keith hadn't caught her in the act, so she pointed it out and he parked. "Thanks for the ride," she said, and moved to undo her seatbelt.

His large hand closed around her wrist and pulled back, not forcefully, but just to get her attention. "Listen, I mentioned I'm going to be home alone all weekend. I was thinking, maybe if you, you know, dropped by, like you came to visit Stacey, we could..." He didn't finish, but then he didn't have to, she knew exactly what he was suggesting.

"Thanks. But I don't think I can. Only reason I came out today was my brother was gone." I'm his fuck toy, not yours, she wanted to add. You were just convenient. Instead she said, "I'm supposed to be grounded." He seemed disappointed, let go of her and brushed her arm with his palm apologetically, and she reconsidered... what if he left her again, to go play with his new toy Trish? Maybe she'd just have to live with it, her parents might not let her out, but... it'd be good to have a second option, wouldn't it? Other than suffering, or maybe, maybe asking her real Daddy to help her cum? "But I don't know, maybe things will change and I'll be able to get away."

He nodded eagerly. "Well, look, I'll tell you what... if you can drop by... I'll leave the side door unlocked. You won't have to ring the doorbell. That way, if anyone asks, you can pretend you forgot Stacey was gone, and I can pretend I didn't know you were in the house. And when we're alone, maybe, both of us can pretend..." He must want her to play Stacey again, she realized. Wow, he must really want to fuck her bad. No wonder he spoils her.

She opened the door to step out, feeling some slime between her buttocks as she transitioned from sitting to standing outside. "Maybe." She hoped not, though but now that she had these marks on her, and a jerk for a brother, sometimes she had do choose between things she didn't want instead of things she did. And maybe it was best to keep her options open.

***
Chapter Thirty-Five:

Susan went inside without looking back. She needed to clean herself... a full shower might be nice. Within the safety of her home, after discovering that nobody seemed to be home, knot loosened inside her stomach... not just the respite from horniness, but also the anxiousness she'd been feeling since, that she'd get caught. But it looked like she'd gotten away with it, and it served Keith right.

That feeling lasted until the end of her shower when, after she changed her clothes, she came downstairs and found her brother in the kitchen, chugging from a bottle of Pepsi. She hadn't heard him come in, and was relieved that she chose to take a shower right away, otherwise he might have caught her smelling like sweat and sex. Now there was no reason to suspect anything, as long as she acted normal... which meant acting like she had spent all day suffering from super horniness. It was weird that now that she was thinking clearly, Susan wasn't sure how that she'd respond to her brother's sudden appearance after being stuck at home masturbating non-stop.

She went with anger. "Finally!"

He gave a little smirk, put the bottle down on the counter. "What? Did someone have a rough day? Did you miss me?"

She had to think about that for a second to find an answer she'd be able to say. "I wish you hadn't gone."

"Too bad, I had some things to do. Got some nice video, too. Want to see?" He held his phone out towards her.

"I'm curious, but not really," she said, because apparently "no" felt like too close to a lie. "I want you to make me cum." At least that was true, even if she mostly wanted it so that he wouldn't suspect anything. But she always almost wanted the pleasure, the connection and closeness to her brother, at least a little.

"Want, or need?"

Uh-oh. Technically, it was 'want' right now, unless 'need' was meant very generally... except, even then, she didn't need him to make her cum, not anymore... today proved she had other options. But if he learned she didn't need it, he might start asking why. "I just took a shower," she said. "That usually helps a little." She didn't lie, just didn't answer the question he asked.

"Hmmm. Maybe I'll get you all worked up and only let you cum while watching the video. Before long you'll be begging me to let you fuck a dog too."

Too? "You made Trish fuck a dog?"

"I didn't MAKE her, she wanted to. She's a kinky girl."

"Yeah, but... you made her want to."

He gave a smirking half-grin. He knew she was right, but wouldn't even outright admit it. "Maybe I just opened up what was inside her all along. Besides, at least I'm nicer than you... you're the one who wanted her able to have puppies. If I listened to you, with all the dog cum she had inside of her, she'd be carrying a whole litter. See, look." He approached her with the phone and flicked through his pictures. Trish in various spots of undress... a sudden, incongruous photo of Mom up against a tiled wall, mouth wide, eyes closed, and, most unexpected at all, nipples exposed from a blouse and bra pulled down over her chest... but that was swiped away and forgotten as there was Trish petting a dog about half her size, then a video clip which he didn't bother to open, and finally a shot of Trish's splayed open pussy with a clear liquid dripping out. "You know what that is, don't you? She'd be in deep shit if I did what YOU wanted... unless you sucked it out of her maybe. Too bad you weren't there, really, but... you had to learn a lesson."

Her face wrinkled up in disgust, then looked away from the phone screen and back up at him. "Is the lesson over?"

Keith's head tilted and he stared at her a moment, without saying anything, which was unsettling. But then he said, "I don't know. Maybe I'll throw you a fuck, but as for whether you can cum... you might need to beg for it."

"I'll beg," she promised. "You can tie me up, or do me wherever you want, just please say I can cum at the end of it." The plea in her voice wasn't even faking, she really didn't want to be left hanging for another few hours.

"No requests?"

"Whatever you want is fine."

He smiled, though something in his eyes didn't match with it. "That's what I like to hear." He made a gesture, like 'lead the way', which wasn't taking control like he usually did but probably meant he just didn't want to do it in the kitchen, maybe he wanted the living room couch or would direct her upstairs, or somewhere more unusual.

She looked back at him as they passed the couch to see what he was thinking, though he was watching her carefully. "Surprised you're not running upstairs," he said, and Susan's heart thudded, but then dropped as he continued. "Frankly, surprised you're not begging to blow me. I mean, by now you must be jonesing pretty hard on your cum addiction, right?"

She couldn't answer that like she wanted to, because she wasn't. She couldn't lie to Keith. She was still addicted to cum, of course, she'd drink it down if she got some, but she'd just sucked her fingers in the shower after cleaning some out of her ass. No, the need wasn't that strong, she wasn't jonesing by any means. That was the flaw, she acted horny and annoyed that he left her horny, but she'd forgotten to act cum-starved, and he'd noticed. She prayed he'd let it pass, but the silence dragged on and she had to come up with something. "I'll blow you right now if you want," she said, trying to sound excited about the offer rather than the dread she really felt at his suspicion. It didn't seem to come out as eager as she intended.

"Are you jonesing for cum?" he asked, and when she didn't answer, she saw his face fall, confusion, maybe fear, and she knew what was once a suspicion was now a certainty.

Susan hung her head and felt her face flush, her racing mind ready to offer to fuck a dog for him if only it would distract him.

"When was the last time you had cum?" he asked. Even knowing it wouldn't work, she decided to remain quiet since at least that wasn't a lie. "Susan, answer me."

"A few minutes ago," she said. "While I was in the shower." Now she prayed that her brother would believe she'd somehow tasted her own cum, that she'd somehow gotten around the restriction... if only she could lie, she could already imagine an excuse where she tricked somebody into saying she could cum over the phone, which would throw him off the truth. But if she could lie, she wouldn't be in this mess in the first place. Maybe she could find a way to word it so she was simply stating it like a hypothetical, rather than saying she actually did it.

Before she could, he asked. "And who's cum was it?"

Her mouth tried to fight its way into motion to violate the commandment written on her, but after a few seconds she blurted out, "Stacey's dad's." She was looking back up, watching him and saw his face relax when he said 'Stacey' only to tense again when she finished the truth. She had tried to stop before 'dad' but it just wouldn't work.
"He came here?" His voice was cold, calm on the surface but she could see the rage bubbling beneath him and that made it scary.

But he'd asked her a question and she couldn't lie. "I went to their house. You weren't here, so..."

"So you had sex with him?"

There was no sense hiding it anymore, so she didn't even try. "I let him fuck my ass on the way home. And I sucked his cock there."

He whipped the plastic bottle he was holding so quickly that she flinched and put her hand up to defend herself, before she realized that it wasn't thrown at her, but rather to the side. It landed against the wall with a crumply thud and rolled noisily until it hit part of a rug. "What the fuck, Susan!? What, you couldn't wait a few fucking hours?"

She wanted to shout 'No,' but the words stuck in her throat, unable to be said. It wasn't the truth, not really. The truth was, she felt she could have. If she had to. She just didn't want to stay home suffering anymore. "Probably, but I was horny. You shouldn't have left me alone."

"I thought it'd be funny!" said like that was an excuse. "I was just teasing you! I didn't expect you to go all slut on me!"

Susan could feel the expression of incredulous confusion on her face. She pulled down her shirt and pointed to the words 'Fuck toy.'

"Yeah, but you were supposed to be MY fuck toy!"

"Maybe you should have written that then. Then you could be as selfish as you want and you'd never have to worry about what I want." And a part of her wanted that, then she wouldn't have to be tempted, have to think. "Not like you do most of the time anyway."

"Oh don't start with that bullshit. You know you like what I do to you... sure I push you sometimes but I only do things I know you're gonna like. Your body doesn't lie. Shit, half the time I fuck you it's because you need it, not me! I guess you've just proved that if I'm not around you'll fuck anybody you can. You said it yourself, you could wait, you just didn't want to. Your were probably out the door first chance you got, didn't even care that I might not want you giving your ass to someone else!"

Her brother's wounded, bitter angry rant was starting to turn things around in Susan... making her go from ashamed, guilty, sad, broken inside... to angry. Some of what he said was true, maybe, but there was a load of hypocrisy in there too. "Me? You've got a lot of nerve considering you were out spending time with Trish all day! How do you think that made me feel?"

"What? I asked you!" His hands curled up into claws in front of his face like he wanted to tear his hair out but only resisted at the last moment. "I asked you and you said you didn't care about that!"

Had she? Maybe... if so, it was when reverse psychology was still a strategy that worked sometimes. "I could lie to you then. You didn't ask me after that. I don't think you wanted to. You know what, Keith? You're a jerk. A selfish jerk. I shouldn't have turned you into one, but I'm starting to think maybe you were before that. You just decided to hide it, then. 'Cause even jerks can have hearts, and sometimes it feels like you don't." That was technically true, but she said it deliberately to wound him, and she didn't want to do that, so she took a breath and said more calmly. "What happened today was your fault too. Seriously, what did you expect me to do? You made me horny, you turned me into a fuck toy, you used me when you wanted, then you left me horny and suffering when you didn't. Of course I was going to find someone else. And you know what? I might fuck him again. Or someone else. Sooner or later I probably will, unless you force me not to. So go ahead. You might as well. You've already ruined me, or who I was."

"Ruined you? You can't possibly think..."

"Of course I do. I can't lie, remember? I don't know if I'm better or worse..." It was like the shirt that she cut up. It might be better now, and if you asked the shirt, it might like the changes because at least it was being used now. It wasn't going to fit her as it was before... but she still ruined it in a way that couldn't be repaired. "But I do know that I'm not your innocent little sister anymore... you ruined that, forever, decided you'd rather have a fuck toy. You can't change it back... even if you let the marks fade away, you showed me good how sex feels and how easy it is to get. I think I'm doomed to be a slut from now on. I just can't promise I'll be yours."

He stared at her, face red, and for a moment, Susan thought he might be ready to cry. Instead, he brushed past her, almost shoving her out of the way. "I'm sorry." He didn't sound sorry, thought, he sounded angry, especially when he continued with, "I didn't think giving you all those orgasms you wanted was a bad thing, but if it's been such an ordeal and you want to fuck other people, then I won't anymore..."

Leaving her suffering again. "Keith, I didn't mean..."

"No, you made yourself quite clear. I ruined you. So, fine... you know what? I was planning on dumping Trish tomorrow, but if I'm really such a monster to you, maybe I will just use her as my fuck toy from now on so I don't risk 'ruining' you any more." He trudged up the stairs, and she tried to grab his arm, to take back some of the things she said... even if they were true, the opposites were true too, that she loved him using her like she didn't matter, that she never wanted to give it up. But before she could say anything, he pushed her back and said words she didn't realize she was dreading. "We're done. I'll just let your marks wear off and you can be a slut or whatever the hell you were going to be without me."

"Keith, please."

"No, I'm leaving you alone, do the same for me. You have permission to cum, go take care of yourself." Her heart broke a little. At this point, he reached his door, and turned around. "Or go whore it up with the whole neighborhood. I don't care." He slammed the door to his room in her face. Seconds later, he turned his music up, harsh angry tunes she hadn't heard since summer started. After a few tentative but unanswered knocks, she returned to her room, to her bed, and started crying.

This wasn't how she wanted this to day to go at all.

***
Chapter Thirty-Six:

A few minutes later, Susan heard her brother Keith come out of his room, and she went to her door too, hoping he'd come to talk to her, to apologize, so she could too, but the moment she opened the door she heard his voice from the stairwell. "Stay in your fucking room until Mom and Dad get home," he snapped, and she closed it right away. She heard him charging back up the stairs a few minutes later, and again his door slammed seconds later.

She only figured out what he'd done after their parents got home. She heard them, but didn't feel like coming to greet them, until they shouted for her. She trudged downstairs where they were glaring at her.

"Susan," her mom said, after a quick look with her father to confirm that she would be starting this. "Your father and I have trusted you to be responsible, so if there's anything you need to tell us..."

She stared blankly. Obviously, mom didn't care that Keith was having sex with her all the time (all the time before today, she reminded herself with a stab of heartache). What else could it be? Did she know that she'd fucked Stacey's dad? She didn't think so, she thought their reactions would be through the roof, but... then, everything's been hard to predict since the marker changed them. Maybe, though, they knew she left the house alone. Mom could have called home, and found nobody.

Still, she wasn't stupid enough to volunteer anything, just in case it was wrong. "What?"

"Your father and I keep a bottle of scotch in the cabinet here for guests, and it's not here now. Did you take it?"

She knew the cabinet was there, knew its contents, but hadn't thought about it in months. It was one of those things that had stood unchanging in her mind so long that it became invisible. "Why would I take it? I don't drink."

"You've been engaging in a lot of bizarre behavior lately," her dad said. "And who else would have taken it?"

Who else indeed? She knew immediately it was Keith... and also knew there was no point to trying to convince anyone in that room of that. They trusted him completely. But, maybe she could take the heat off herself. "I didn't do it. Look, smell my breath." Mom did, but she still didn't sound convinced, so she thought quickly. Maybe she could convince them they drank it and forgot? Or that Keith took it for a good reason? Then inspiration struck, and a small glow of satisfaction warmed through her foul mood. "You know what, Keith had this girl Trish over here briefly. I wouldn't be surprised if she took it. Without Keith's knowledge, I'm sure." Then she added, "He's too good for her, you know."

"Well, who isn't?" her dad said, and Mom nodded, but unlike her father, she still looked like she suspected Susan, probably because she saw her as a hell-bound wild child with no morals.

"Come on, you know it wasn't me. I mean, I know how to have a good time without booze, Mom." She gave her a pointed look, daring her to make her say exactly how she has a good time in front of Dad.

She got the point. "You're probably right," she said. "I'll go talk to him, though, make sure."

While her Mom went upstairs, her Dad shrugged at her and said, "I didn't really think it was you, sweetie, but we had to ask, since there didn't seem to be anyone else who could."

Nobody except Keith, but obviously they wouldn't believe that, so she just shrugged back. She couldn't even take pleasure in outsmarting their programming. She just wanted to go back upstairs and cry in her room some more, but she got the sense that until her mother bought the lie, or saw Keith with the booze and came up with some explanation why he needed it, she wasn't allowed to leave the interrogation zone.

Mom returned only a couple minutes later. "He's shut himself up in his room," she said. "Playing his 'woe-is-me-angsty-teen' music and doesn't want to talk except to tell me to go away."

"Wow, haven't heard the angst-mix since school ended," Dad said, then looked at Susan. "What did you do to him?" He seemed deadly serious for a moment, then broke into a smile, admitted, "I'm just kidding," and looked back at his wife. "Think it was this Trish girl? Got him all tied up in knots?"

"Maybe," Mom said, but she too looked directly at Susan like she didn't believe it, and hers wasn't just a joke. "If it is, he'll see through her sooner or later. Anyway, if he's being all mopey I'd better handle dinner tonight."

"Damn. I was getting used to actually eating well."

She smacked him on the arm and rolled her eyes as she went into the kitchen, but not with any real anger. Dad flashes his usual boyish grin like he expected she would be amused by his jokes, which sometimes she was, but not today. Instead, since the matter of the missing bottle seemed to be forgotten, Susan went to her room.

Dinner was a quiet, awkward affair. Her brother refused to come down, claiming he wasn't hungry, and Susan tried the same but her mother wouldn't allow it, so she sat at a table picking at her food and thinking about how it really would be better if Keith had cooked it, even if he'd cum in it, which made her think about how much he needed cum.

When they were done, Mom asked her to clear the table and rinse the dishes, and then told Dad that they were running low on milk and that he should go out and get some so he had some for coffee and the kids had some for breakfast the next morning. He grumbled and groaned for a few seconds, but finally got his shoes on. Mom gave him a few other things to pick up on the way.

The moment he was out the door, her mother snapped her fingers to get Susan's attention. "I'll finish the dishes. Your father's going to be out for a few minutes," Mom said. "Go try and put a smile on your brother's face, go up there naked and beg him to have sex with you."

She put the plate she was rinsing down, stared at the tiles on the floor. "I, uh, don't know if we will be having sex anymore." Even if she could apologize for saying he ruined her, she worried about how he seemed so betrayed that she let Mr. Mancuso fuck her ass... maybe that's all he'd think of from now on, and wouldn't want to touch her. "So maybe you have one less thing to worry about.'

Susan was looking down, so she missed the sudden growing anger on her mom's face, at least until she was grabbed by the chin and forced to look each other in the eye, her mother waving a finger at her forcibly puckered lips. "Put that thought out of your mind, missy. If that's why he's all mad at the world up there, then he has every right to be. You're the one who forced yourself on him. You practically begged me to let it keep going on." That wasn't how Susan remembered it, but she was too sad and shocked to argue, so she just let her mother continue. "You're the one who started the incest, you don't get to unilaterally decide when to stop it." She let out an angry sigh and let go of Susan's face. "I warned you. This is your responsibility, Susan, you got him used to having a sexual outlet at home, taking it away is just cruel. This isn't like having a pet. If you expect me to pick up the slack and do all the dirty work just because you got bored once the novelty wore off, you're going to be sorrier than I am."

"I'm not the one who doesn't want to," she admitted, tears starting to flow. "I think he doesn't want me anymore. He hates me now."

Her mother softened immediately, pulled her close and wrapped her arms around her, spoke to her in soothing motherly tones that Susan felt like she hadn't heard in too long. "Look, I'm sure that's not true. He's just mad. Whatever you did, he'll forgive you eventually. That's what family does. I can't promise he'll always want to have sex with you... I mean, he's not a pervert, obviously your body's too young to really turn him on like a real woman." The voice suddenly sounded less soothing, more smug, and was by extension much less comforting. "But he'll always love you. I still think you should go up there and beg his forgiveness. Maybe offer to let him spank you or submit to something else sexual that you think is disgusting but he likes. And if he doesn't want to talk to you today, try tomorrow, and the next day. Sooner or later, he'll stop being mad."

Maybe, she told herself, but she had a point. They've fought before, and it calmed down eventually. It felt like the end of the world, but... it always felt like that when it got really bad. Apologies could still save this.

Maybe not right away though. She tried knocking when she went upstairs, only to hear the words "Go away!" The words sounded so full of rage, even angrier than Keith was when he retreated to his room, and she abandoned any hope of spending the night with him, tiptoeing back to her own room where she stayed alone until her parents said good night. She tried once more after they were safely asleep, but there was no answer at all.

Spending the night alone was daunting, like her old fears of the dark had somehow returned now that she'd had someone by her side. She even considered slipping into bed with her parents, who were due to be completely unconscious until morning and so obviously wouldn't mind, give her the sensation of someone being near her. She could even satisfy her cum addiction with her father's cock... though if she did that, she might not be able to stop sucking him until he woke up in the morning and forced him off her. Even if she tried to ride his cock as he slept, let him cum inside her, she still might get too close and wind up ruining one more thing.

Besides, it wasn't her father she wanted, not really, it was Keith. She missed him, missed sleeping with his arms around her, making her feel safe, as much as the mind-blowing fuck toy orgasms that he could provide, when he was in a generous mood, anyway. The thought that she might have pushed him into giving up on her, at least as a fuck toy, ached like someone had torn a piece of her away. She wished she hadn't said those things... she was angry, and what she said was true, but it wasn't the whole truth. She definitely wished she hadn't gone to visit Stacey or let her dad ass-fuck her, even though those images in her head kicked up her horniness and made her start to masturbate. It was a sad affair, as her mind kept bouncing between the shamefully hot--fucking Mr. Mancuso while forcing Stacey to watch, having sex with a dog, her father getting her pregnant--and the depressing state of her relationship with Keith. She was unfair with what she said to him, Susan knew. Keith might be responsible for her being a fuck toy, but she made enough stupid decisions on her own to share in the blame.

As she rubbed her pussy, and gently squeezed her clit between two fingers, she thought about what her mother said, that she should beg Keith's forgiveness... that wouldn't be enough, she knew, nor would offering to fuck a dog for him, probably... not that she wouldn't, if that's what it took, she just didn't think it was enough. But Mom also used the word 'submit' which sounded appealing. Maybe, then, she could offer something, a permanent peace offering. During their fight, she practically dared him to write that she belonged to him, or that she couldn't fuck anybody else. What if she told him again, but this time made it an offer, told him that she wanted him to, which, she thought, would be the truth, or at least partly true. At the very least, she wanted it far more than him leaving her alone... that, she was beginning to understand would be unbearable.

In fact, she was willing to go even farther. In some ways this made the perfect excuse, to surrender completely, lay it all on the table, tell him she wanted him to write that, to make it permanent. She didn't know if it'd work, but there was that idea, the idea she'd always kept to herself, that he could write on her body 'marker words are truly indelible' or something like that to make them permanent. It was a super dangerous idea, but maybe the thought of being able to control her for ever might change his mind about abandoning her in favor of Trish. Maybe even tell him the big truth, that she couldn't bear not having him anymore, that she loved him far more than as a sister, but like a fairy tale princess loves her prince. Sure, he was a jerk, but so was the Beast in Beauty and the Beast, and that worked out. Maybe by making the marks permanent, this could be her happily ever after... even if it did mean she would have to watch what she wore the rest of her life, or worse, that she might have to share him with Trish instead of having him outright. She couldn't recall in any fairy tales that ended up in threeways with the prince's fuck toy sister and another girl, of course. Maybe that proved it wasn't the kind of idea that lead to a happily ever after at all, but she loved him enough to take the risk.

***
Chapter Thirty-Seven:

Susan came to that daring thought, growing to like it more and more, the complete submission, convincing herself it wasn't a desperate last-ditch effort to get Keith to want her again, but like the next logical step. She licked her girlcum off her fingers and tried to get to sleep, deciding yes, she'd suggest it in the morning.

Sleep wasn't as easy as it usually was after a cum. She didn't drift off for a long time, mostly from fears about him refusing, but she managed it eventually, much later than usual... and consequently, woke up later, and not by her own choice, as she felt someone tugging at her arm.

She curled up against it automatically with a whine, wanting to get a little more of that hard-won sleep, then heard, "Wakey-wakey, Susan. It's a brand new day."

It wasn't one of her parents, it was Keith's voice, and that snapped her fully awake, even though when she looked at him she thought it was a dream.

He didn't seem angry anymore. Not even a little bit. He just looked at her placidly, the faintest smile on his lips. He was dressed in a tank top and shorts... and she saw the marker in his hand. "What... what's going on?" Had he forgiven her? She dared to hope, her heart fluttering.

"Just going to make a few adjustments," he said. Again, complete calm. It was like their previous fight hadn't happened.

"Are you still angry at me?" she asked.

He tilted his head, as though considering the question for himself. "Not really. I mean, I probably should be. You really hurt me, Susan. But... I just don't care anymore."

That didn't sound good... the words might have... even the tone of voice, but something about it pricked at Susan's heartstrings in warning. Still, she wanted to give her plan a shot. "I had an idea. So that I won't fuck anybody else."

"It's not an issue anymore, Susan," he said gently. "I mean, yeah, yesterday I was hurting so bad, but... today? Well, a lot's changed since last night." He twirled the marker around his fingers.

That bad feeling inside her just got worse and worse. "What did you do?" she asked. "What did you write?"

"I got drunk and played around with a magic marker. Not my best idea in the world, I admit. But it all worked out. I mean, it could have gone a lot worse. I'm better now. You'll benefit too, at least somewhat. Honestly, it's probably a toss-up whether you're going to like what I've got planned, but... it really doesn't matter. It's all for the best, anyway."

"What did you write?" she asked again, trembling now.

"It's kind of funny, actually considering what you said yesterday. You remember?" He playfully nudged her. "You said you didn't think I had a heart. Which was bullshit, because mine was all torn up by what I'd done to you, and what you'd done to me. So torn up that I had to get trashed just to live with myself. And then I got the idea that fixed everything."

He pulled his shirt off and pointed to his upper stomach, where there was a new mark in black. It was small and upside down from her perspective, because Keith wrote it on himself, and it must have been awkward since it looked like it was just above his breastbone, but Susan didn't need long to make it out. It read, "Heartless" and then, underneath, "(metaphorically)."

Susan's first thought was, 'at least her remembered to say it was metaphorical,' because he was right, it could have gone a lot worse, she could have lost him forever, and the relief from that blinded her to the consequences for a few seconds until she thought about what it meant, really. She looked from the words, to Keith's face, finally understanding that calm look, how he wasn't mad. Of course, she thought, feeling the color drain from her face. You have to care about someone to be mad at them. And without a heart (a metaphorical one, anyway), you don't care about anyone.

"Things are much better now," he said. "For me, anyway. They might be more difficult for you." He shrugged, like it didn't matter to him one bit. And it was quite possible, it didn't. "Or maybe you'll like it. We'll have to see. Take off your panties."

"What?" That was almost like the old Keith, and she dared to hope for a second that this was an elaborate prank, that he'd written on himself in regular marker and had just been trying to scare her.

"I said take off your panties. I may not have a heart, but I still have a cock, and you're still better than my hand." He dropped his shorts and she saw that he did indeed have an erection.

She slid them off and he pulled her to the edge of the bed, rested his cock on her mound, then pushed it in. "Hold still, I'll finish fucking you after this." And he held the marker out, uncapped it, and began to write right over Susan's pussy, the part that Keith had teased about saving for some special marking. He said he hadn't had any ideas, but as she saw the word take shape... S... L... A... V.... E.. He'd just made her a slave, and she wondered if maybe he had that idea already, but just held himself back, because he loved her and didn't really want to hurt her. But he no longer cared about that, she realized, as tears started to stream down her face.

Just hours ago she made the decision that she could try living happily ever after as Keith's private fuck toy, even if he was a jerk, as long as he loved her.

Being a slave to a heartless jerk, though? She couldn't let that be the end of her story... she had to find a way out... somehow. She had to get a hold of the marker and undo all of this, cross out every word or write something that solved everything. She wasn't sure how, yet, he'd probably be more careful than ever, and there was probably no chance of appealing to his love for her, she couldn't even lie to him to trick him into something. It seemed impossible, but she couldn't give up. He might not love her anymore, but she still loved him, and this was going to ruin them both if she didn't find a way out. Maybe he would be lulled by the new word, drop his guard, and she'd get her chance. All she had to go on was the hope that her brother still hadn't realized how much words mattered. Yes, she was a slave.

But slaves sometimes rebelled.

It would be easy to correct if he discovered his error, so she'd have to be very careful, obey every command and pick her moment. One slip up, and her future would look as black as the newly inscribed letters on her cunt.

End of Book Two

Coming Eventually Maybe - Magic Marker, Book Three: Black: Susan's a slave of her brother, and the black magic marker that controls her, body and soul. But she's still got a little bit of free will left, and now she must play a dangerous game, let her brother seem to win, let him force her to do whatever perverted thing crosses his mind, even let him change their parents and the people around them in ways that might never be undone... play along until she gets an opportunity. She just hopes her soul isn't crushed before it comes.

This story is free to share and distribute so long as no money is charged.

Art: As stated, this story was inspired by a piece by Danaume, and she deserves all of the credit for the basic idea. You can see the picture here... it takes place during Book Three, (early though) so it serves as something of a teaser or spoiler.

She also drew a picture of Trish that I worked into the story as Susan imagining what marks to ask Keith to make on her (link to be added if I find it).

These links go to drawn art of underage fictional characters, which may be illegal in your jurisdiction. Click at your own discretion. Pixiv account may be required.

And if you liked this story, please provide feedback (through Formspring, which works better than ASSTR but is still a bit buggy - if you see something about a confirmation e-mail try again in a few hours, I won't have seen your message):

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