“Dad?!”

Windseeker sank her tail with a squeak, but the damage was done. He’d seen her, tail up, winking into her own hoof as she climaxed to the thought of being bred.

“Hey there, um, pumpkin,” her dad said with a nervous grin on his face.

Facing his way blushing, she couldn’t look him in the eyes when she said, “I—I was just… doing… getting satisfied with my um… j-just part of…”

“Windy, it’s okay if you were touching yourself,” her dad said with a look of sympathy. “I shouldn’t have walked in on you.”

“Well I kinda wasn’t, but I mean I kinda was I mean…” she risked a look at him, “You’re not… mad about it?”

“Why would I be mad?” he asked in confusion.

“Other fillies say it’s um, wrong to do this,” Windseeker said, uneasily swishing her tail, “And they’d get in huge trouble if their parents ever found… out.”

“Have you been doing this with other fillies?” he asked incredulously,

“N-no, just… you know, fillies like to… talk about what other fillies are doing, in… in theory,” Windy said, unsatisfied with the explanation herself. She hadn’t believed that ponies could do that, but now she was doing it, and couldn’t stop doing it.

“I didn’t even know you had started masturbating yet!” he said, shaking his head slowly, “So you just started…”

“Yeah, I… started,” she said with a full blush, “Just um… feeling like trying it and… it started working.”

He came alongside her, laying a wing across her back, as she related in increasing frustration, “I know I have a fillyhood but it never, I mean it just started feeling… funny, like a-achy like I need to… I mean it’s normal I mean—”

“I know you mean it,” he chided her gently, “Just say it.”

“I… like… touching myself,” Windy admitted with difficulty. It was really hard to just say it, instead of flailing around with her words like a frightened chicken, but her dad had taught her it was a good thing, so… she did.

“How did your fillyhood start feeling?” he prompted, sitting down on his belly with her in her pink walled bedroom, “It’s not like I had much chance to ask your mother, so I really don’t know how they work. But just tell me, and no matter how weird it sounds, it won’t be stupid, because you have a fillyhood, and you know how it feels better than anypony who doesn’t.”

“It just started feeling… itchy,” she admitted anxiously, “I mean not like a rash itchy, but a really achy, deep…” blushing again, she concluded, “…itch.”

“They do call it feeling the itch,” he said lightly. Windy had to admit she was pretty sure she’d heard that somewhere before. “You know, my penis feels the same way,” he added, sending Windy right back to blushing territory.

“What? I’m still a pony,” her dad griped, “I have all that stuff too, just the guy version of it.”

“W-what was it like when you first started… y’know…?” Windy asked tentatively.

“Well, I was around your age,” he said, “And yeah, it started getting all tingly and itchy, like a deep ache you really wanna rub. Of course since I’m a guy I started getting erections.”

“O-oh yeah, that is a thing that guys do,” Windy said, adding faintly, “That you… do.”

“Yeah, it just comes out, gets hard, happens to every colt in your school,” he said, asking, “You haven’t been having sex with any colts, have you?”

“No, but I’ve been…” Windy shouldn’t have said ‘but.’ Why did she say ‘but?!’ “…thinking about it,” she whimpered.

“Whenever I um… masturbated,” he said, “It felt like I was changing. The more I touched myself, the more I started thinking about what it would be like to go into a filly. And every time I climaxed… it felt like the lesson stuck. Started seeing fillies as… places my penis could go.”

Sighing, her dad added, “Not that I was trying to jump every filly in school. I just started seeing it as a thing that could happen, and started wanting it to happen with at least somepony.“

“Exactly!” she replied in surprise, “You look at colts and start thinking like it could happen, but you’re not going… crazy over it or anything.”

“You know, it’s okay if you have sex with a colt,” he told her.

She looked at him in disbelief, asking, “Seriously? I could just… bring home a colt and… t-take him to my bedroom, and…” she was stammering as she fell into her fantasy that she was sure never would happen.

“Sure, you can,” he said, impossibly, “You can even turn your tail for him, and he can mount you, and cum inside you.”

She just stared at him in shock.

“You might get pregnant, though,” he told her seriously. “But if you don’t mind that, go ahead. I’m sure you’d enjoy it! Got any colts in mind?”

“N-no, not r-right… now…” she said absolutely shyly.

“Well, don’t worry about it,” he said, “If you don’t want a foal this young, there’s lots of stuff you can do, even if it feels pretty darn good to get that foal into you.”

“Yeah I… didn’t even think about foals,” she said sheepishly, “I guess I really could get… pregnant now. And like, give birth, and stuff.”

“Pretty weird, huh?” he prompted, earning a nod from her. “Just make sure you wanna be nursing a foal in class, before going all the way with somepony.”

“I think I can do that,” she said with a small smile, finding it surprisingly pleasant to imagine a teenage filly there in class taking notes, with a foal suckling at her teat.”

Nuzzling Windy, her dad said, “My daughter wants a colt cumming inside her in her bedroom, huh?”

Blushing, but not turning away, she said, “S-sometimes when I’m lying in bed, I wish a colt would just come and…”

“slip into your bed, and just start doing you, huh?” her dad prompted.

“Yeah!” she said, hopefully, “Is it really okay if I just… talk about this?”

“It’s more than okay, I’m really honored you trust me enough to tell me,” he replied, “Your fillyhood’s even more mysterious for me, and you’re just sharing it with me. Most fillies would just shout at their dads to get out, and keep it to themselves.”

“Well okay, so I just… tell you how my fillyhood’s been um… messing with me?” she said uncertainly, any fear she had falling into simple puzzlement.

“Messing with you?” he replied, “Sure, how’s it been doing stuff to you?”

“Well, i-it just…” she bit her lip, “…started getting wet, and I know I guess that’s totally okay with you since you’re supposed to like it—”

He cut off her nervous stammering, saying, “Of course it’s okay with me! Nothing feels more amazing than a wet pussy.” He kissed her blushing cheek, saying, “You’re pretty amazing whether your pussy is wet or not, though.”

“It’s um…” she squirmed her hindquarters. “It it w-wet I think. My… my pussy is wet. I was just touching i-it after all.”

“No doubt,” he agreed, “Plus we’re sitting here talking about getting mounted and having foals. I’m actually… pretty erect right now, just thinking about it.”

She was speechless for a moment, but then feeling like her hindquarters were melting, she said in a nervous humor, “Yeah, my vagina is definitely wet now.”

“Well, good,” he replied, looking a little nervous himself. “So it’s getting wet, and making a colt want to mount you.”

“Yeah,” she said indulgently, “Just stick his nose under there and… u–um get ready to mount… I want a colt to smell me, down there.”

“Seems fair,” he said, snugging her closer to his side, “When I smell a mare down there, it makes me wanna mount her no matter what.”

Nodding shyly, she said, “N-not just down there. I um… i-it’s weird.”

“It’s supposed to be weird, go ahead and tell me,” he griped.

“I was… peeing i-in… front of the other colts,” she said. “J-just a little. Nopony saw me. I just… started wanting them to smell me.”

“Huh, and your fillyhood’s been extra hot and sort of winky lately?” he said.

She nodded at that.

“Well, you’re probably in heat!” he declared, “That means you have an egg inside you right now, just waiting for a colt’s sperm to start making that baby in there.”

“Yeah I could get pregnant… like… really bad,” she said with a wince.

“Estrus raises your chances a heck of a whole lot,” he said, “Though often a filly’ll go into estrus right after a colt came in her. That’s what happened to your mother.”

“…really?” Windy asked, curious more than scared now.

“Yeah, she was… really vocal about it,” he said with a small laugh, “She couldn’t be pregnant since she wasn’t in heat she said, but the truth is soon as her body had that seed in her, bam: out came the egg.”

“She… didn’t want a foal,” Windy said sadly.

“No, she didn’t,” her dad said, solemnly. “I’m sure you could be friends someday, but yeah. She nursed you until you were weaned, and… that was it.”

“I’m glad you… adopted me,” Windy said, “I dunno what I’d do without… any parents at all.”

“Lots of fillies and colts do well in the orphanage,” her dad contested, “But yeah, it is a challenge. I’m just glad she was willing to give you up. I wasn’t having any luck finding a mare to make a foal of my own.”

“I-I wouldn’t mind…” Windy said tensely, “Making your foal.”

“That’s the heat talking,” he said, kissing her forehead, “Just like it’s making you want to pee so that colts know you’re receptive.”

“Oh, is that why…?” she asked unsurely.

Nodding, he said, “Yeah, I’m pretty sure I read it somewhere, but when in heat, your pee’s got these pheremones that drive colts wild. You’re doing it so he can smell that you’re in heat, and start the whole… foal thing going. That’s why you want to pee in front of other colts.”

“I–I also peed in the backyard,” she said self-consciously, “Not just in front of colts. But I just… didn’t really know why. I don’t know if I was in heat, or just… peeing.”

“Well, let’s go find out!” her dad said, standing up from beside her.

“Seriously?!” she squeaked looking at him incredulously.

“Hey, I’m technically a colt, so I probably totally could smell it!” he said, and admittedly, Windy could not argue with that logic. Nevertheless, she was somehow not getting in trouble for peeing outside, on the dirt by their patio, while her dad actually smelled it. Her hind legs were trembling and her tail was going up as he bent forward and sniffed around the area.

“Yup, definitely smells like heat,” he said, lifting his head up to look at her. Trembling, Windy asked, “C-can I um…” she peed. Urine trickled out behind her, spattering on the patio stone.

“Oh, peeing for me, huh?” he said in a teasing yet not teasing tone.

“…yeah,” she admitted, firming her lip, and turning her rear to face him. “I’m in estrus, so I… wanna,” she peed a little again. He made a show of smelling it, saying how much it was turning him on, and so she stood there, just peeing out everything she could. As a strong stream of pee rushed out of her, making an outright puddle on the ground, she watched with baited breath as his penis stiffened again, standing straight and thickening.

“You’re getting really… big,” she said, licking her lips, “So you wanna… put a foal in me, I guess.”

“I… I do,” he said urgently, hunched there, “I think you’re gonna feel it after all… all the way. I’m gonna mount you, and… cum inside you, and you’re gonna have a foal, now.”

“D-dad, I–I don’t know,” she said insecurely.

“Turn around,” he replied, “Face away so I can mount you and put my penis in your vagina.”

“My… vagina,” she whined, turning her rear to face him, and turning her tail aside just like they told her mares did. She could feel herself wink ecstatic about what the exotic experience of a penis would feel like.

His weight came heavily down on her hindquarters, and his hooves slid down her flanks, making her whine needily. “D-dad, you’re… holding my flanks it’s really making me want it,” she said breathlessly.

Something pressed against her back there, and he said, “How’s that feel?”

“That’s your penis, huh,” she replied, trying to look back but unable to see anything but her father hunched over her rump as something prodded her rump down there, right at the center of her need. “It’s… pushing against me. I feel really soft. I-I’m scared ‘cause it’s happening to me. I’m… I’m… stretching?”

“That’s your vagina,” he purred, “I’m going inside you now.” He pushed against her again, and his penis started sliding along her insides, all around.

“Oh, you pushed… deeper,” she breathed, as something opened her, stretching deeper and deeper. It felt like he jammed up all the way to her belly button before he was satisfied with how deep he was.

“So how’s it… feel to have a penis in you?” her father asked, hunched over her, doing that.

“It’s… weird, I can feel you all the way in there,” she said, eyes distant as she felt her vagina so deeply stretched.

His hoof came to touch her belly, right where deep inside his penis was. “That’s where your foal’s gonna grow,” he told her, stroking right above her teats, “That’s where my cream’s gonna fill you, and you won’t be able to stop having a baby then. This’s how… your mother felt, when he came inside her. Then she couldn’t stop you from growing bigger and bigger inside her, until one day she couldn’t stop pushing you out.”

As Windy panted there, full of her father’s giant penis it felt like, he said, “Your mother just lay there and squeezed again and again, until you squeezed right out of her vagina. That’s what you’re gonna do. You’re ready to become a… a mother.”

“Can’t believe… can’t believe that’s a penis, and it’s way up there! Can’t believe we’re doing this!”

“Well we’re doing this,” he replied, “I’m not gonna pull out, and… you’re gonna have my foal.” Then he pulled out a little, then pushed in, starting a slowly speeding up humping rhythm.

“It’s—sliding… tingl—oh… huhh uhh,” she tried to describe it, but soon all she could do was pant there, as his sliding phallus made her vagina explode with singing tingles. She humped back against him, already so worked up. “Dad!” she said urgently, “I’m gonna orgasm!”

“Do it,” he said, not stopping his humping. He wouldn’t stop! “Let it… fill you… take you over… wanna see… you cum… Windy,” he said, and she couldn’t take it. Her pussy fell over the edge of climax, and she threw her head back gasping in singing pleasure. It was so different with a penis in her! Windy couldn’t stop her pussy from pulsing around it, squeezing it again and again. Her eyes were full of stars, and nothing she could love more than being this for her dad.

He was fucking her after her climax eased off. Staring dully forward and pushing her hips back, she grunted, “Don’t even… care. Gonna push your… baby out in… in class.”

He stopped thrusting at that, deep inside her, huffing, “Oh… Windy. If you… feel that way, then if you… go into labor, I’ll send you to… school. Try to hold out until class, then you can give birth in front of all the other foals.”

“Give birth to your… penis!” she moaned senselessly, “It’s between my legs, in me!”

He started fucking her again, saying, “I need to cum so bad…” He needed to cum! She pushed back against his… penis, trying to make him cum. She tried to squeeze around him, as she slid around him, when he thrusted in and out.

Then he flared and her eyes snapped wide, as the penis ballooned in her bigger than anything she could ever imagine, filling all her aching emptiness. “You got bigger~“ she whined.

“Ready to… cum…” he said in short, deep thrusts. “Gonna cum… cumming! Cumming… cumming…!”

He shoved deep into her really hard, and stopped thrusting entirely. “So this’s it then?” she asked anxiously, then a burst of hot fluid exploded into her deepest places, right where his penis was pressed. “Ohhh I feel it,” she said as another spurt followed, then another. Pushing her hips against his, to ensure his penis impregnated her, Windy looked back at her hips and huffed in disbelief, “I’m just… taking your seed it’s just… going into me.”

“That seed’s… gonna…” he said as the spurts began to die down, “Change you into… a mother.” With a mighty flex of his penis within her, her father was done, and Windy was in shock. She stood there with a penis inside her, and even deeper a warm, slimy goo that felt like it was filling her. “It’s swimming up inside you even now. Your egg’s sending… chemical signals to call the sperm to find it. To make you pregnant.”

“Oh, my egg wants your sperm so bad…” Windy moaned. “It’s gonna happen, in… in me!”

…

Then he made her take birth control it was so like, not fair!

“But I wanna have your foal!” Windy whined, not wanting to take the pills that would stop it.

“Incest is wrong,” her dad told her admonishingly, “You can have sex as much as you want, but if you have my foal it might be seriously messed up.”

“A-as if abortion wouldn’t mess it up?” Windy protested, furiously.

“Windy, you’ve got about nine months before it’s even a concern,” he said ruffling her mane with a hoof, “It’s just a cell right now, if you even got fertilized.”

She just glared at him defiantly.

“Tell you what,” her dad sighed, rubbing his forehead, “If you really want a foal, then find a nice coltfriend and bring him over to visit, and we’ll get you with foal the right way. How about Dusty Trails? He seems like a nice colt.”

“I don’t want a…” she said righteously, then less certainly looked down at the pill in her hooves.

“I’m not budging on this one, sorry honey,” he said, “If you want a foal, then bring home a coltfriend, and we’ll see what we can do.”

…

Dad: So, you wanna fuck my daughter, huh?

BF: S-sir? I would never even think of.

Dad: You don’t have to lie to me. I know how you colts think at this age. You see a prime piece of flank, and you wanna cum in there, and make my daughter swell up with foal.

BF: N-no, I swear I don’t

Dad: What are you, gay? You’re gonna fuck my daughter, you’re gonna put a foal in her, and you’re gonna enjoy it.

BF: Please, I would never

Dad: Don’t lie to me son. C’mon out, honey. I want him to see the filly that he’s gonna impregnate.

Windy: D-daad… you’re embarassing me!

Dad: Don’t worry about getting embarassed. Just imagine him mounting you, and you won’t worry about it so much.

Windy: O-okay.

Dad: Go ahead, present for him. Lift up your tail.

BF: …

Dad: How’s that make you feel, son? That’s the pussy you’re gonna fuck, standing there calling out to you. She’s so horny she can’t even stop winking. You wanna fuck that, don’t you?

BF: I don’t…

Dad: Come on, not even a little? Wouldn’t it be fun to just put it in there and cum?

BF: M-maybe a little but

Dad: Then get to it! I know your dick is rock hard right now, so get it in her and start filling her with cum.

BF: You can’t be serious?

Windy: He is! He wants you to fuck me! And… and cum!

BF: I–I can’t just

Dad: Nervous, son? This’s the mare who’s gonna bear your foal. Her belly’s gonna grow big and heavy with your foal. She’s gonna lie there giving birth, pushing a foal outta her vagina because of what you’re gonna do to her today. All you gotta do is mount her, and then your foal is gonna be suckling at her teat. Your foal’s gonna look up at you, and you’re gonna be a dad. And that’s why you want in her. So do it. Do what your body needs to, and make your foal in her.

BF: Oh Celestia! Windy: Daddy, he’s in! Dad: Feels good doesn’t it. Just like when I fucked her mother. Her vagina’s making you want it so bad, you’re turning into a stallion. BF: I… I wanna put a foal in her. I w-wanted to all along, c-cum in her… oh Windy you’re so hot in there… Dad: Yeah, just give into your urges and fuck her. You can’t stop now until your dick is filling her with foal.

Dad: There you go son. It’s happening to you now. Good, you push up deep inside her. And you take every drop Windy. Windy: Ahhh dad, I feel it! Dad: Look at you two, turning into a mother and a father. Can you feel your seed just pumping into her and changing her? She loves feeling you put a foal in her. Windy: I dooo… BF: You’re the best dad ever…