All in all, Sophia Rockwell had been having an interesting day. An interesting year, really, but things had escalated rather rapidly. It had started small, barely noticeable. And in fact, small enough that she couldn’t be sure that she even knew when it had started at all. The first time she noticed it, though, was shortly after her eighteenth birthday. She went to the bathroom, washed her hands, and her hands got bigger. Not a lot bigger, but enough that, frankly, it looked just a little bit goofy. She didn’t have the time to worry about looking a little bit goofy, though, so she had quickly dried her hands as best as she could then shoved them in her pockets and gone back to class. She had school to worry about, and from there whatever the fuck she intended to do after school.

Thankfully, they shrunk back down to normal after just a few hours, and so she shoved the incident to the back of her mind until it happened again. She had a glass of water and abruptly found her tongue too big to fit in her mouth. Thank god that particular incident went down at home, because it would have been much more difficult to hide. Then the next time she stepped in a puddle and almost had to buy new shoes. That one was painful, which was when she started to consider maybe this was something she should take a bit more seriously.

She did not, however, actually have the time to take it seriously, and so there had been quite a few more incidents in between then and her actually trying to deal with it. Each one slightly more extreme than the last. It didn’t take Sophia long to figure out the common thread – a body part coming in contact with water made that body part temporarily bigger. In theory that was all she really needed. She knew the trigger, so all she had to do was avoid the trigger. Just never come in contact with water for the rest of her life, easy peasy.

Sophia lived in a very small, relatively out of the way town. Big enough that it had its own high school, not big enough that she could find treatment for what was very obviously a niche magical issue without travelling to a bigger city. Luckily, Sophia had options. She lived near enough to a bigger city that she already went on the occasional day trip anyway. It was something of a centre of magical culture, and so there would definitely be some specialist or another there who could help her figure out why getting wet made her bigger. But there was also an easier option right in front of her face, albeit... perhaps not quite as reliable? In retrospect she should definitely have just fucking gone to the city, but she hadn’t and so she needed to own up to it. In her defence, she felt like it was entirely reasonable to be in a hurry. She chose the closer option because she wanted to get this over with sooner rather than later.

The problem was that the closer option was her mother. Not that she didn’t love her mom, obviously. Just... Well, her mother was just a bit eccentric. She was an ‘inventor’, such as it was. Small town magitech engineer who threw together various gadgets and gizmos and doodads with the intent of selling them and becoming a millionaire. Unlike a lot of that type, she’d actually succeeded, with a line of magically enhanced bedroom aids. Obviously they didn’t break into the mainstream, but they still made her a lot of money. They could probably have a much more comfortable life, if she wanted, but apparently she quite liked things here. And anyway, inventing magitech gadgets was something of an expensive hobby, one that she enjoyed too much to abandon simply because she’d succeeded at finding her fortune. If she had managed it once, she could do it again.

So she had someone she lived with who had extensive experience with magic. But she was also, again, a bit eccentric. A lot eccentric. She had since learned that most powerful mages were a lot eccentric, apparently, so her mother wasn’t actually all that unusual in that regard. “Oh, that? Sounds like a simple magic blockage.”

“A magic blockage?”

“I’m certain I’ve told you how magic reserves work, right? Right. Like fuel tanks but for magic. Everyone’s got ‘em, some are big and some are small and some are very big and some are nonexistent. The bigger your reserves, the more oomph you’ve got. With me?”

“Yeah.”

“And then from there you’ve got the magic channels. You send the magic from the reserves, through the channels, and bam. You cast a spell. The problem here is that you haven’t been using magic. At all.”

“I didn’t figure I could.”

“Neither did I! You never showed any aptitude. It’s my fault that I didn’t think to try anyway, but this kind of thing is actually very common. Lots of people just don’t notice that they can do magic and so their magic reserves fill and fill and fill until they’re too full and they start leaking into their magic channels and clogging ‘em up. And then when they get too clogged, you get a blockage and then more magic tries to flow through but it can’t and so the magical pressure builds and builds until old magic starts getting pushed out by new magic and then stuff like this happens. Spurts of uncontrolled magic. The effects can be unpredictable, though they’re usually not dangerous, ‘cause it’s really easy to notice and then fix before it gets to the point where they are dangerous.”

“Then we can get it fixed quickly?”

“Normally you’d want to hire a specialist for this kind of thing. But I’m pretty sure I can handle it myself. Hold still, this might sting a bit.”

Sophia wasn’t sure what she had been expecting, to be honest. Probably for her mom to just snap her fingers and then that would be it. That’s how most magic stuff usually went, in her admittedly limited experience. But her mom did not, in fact, just snap her fingers. Instead, she pulled out a Gadget of some sort, which really Sophia should have expected. Her mom was, after all, a magitech specialist. She tried to describe it to herself and failed because it honestly didn’t really look like anything, beyond a bunch of scrap metal awkwardly welded together, some wires, some string, a few random wheels, some tubes, a large spring, and what kind of looked like actual literal duct tape and bubblegum? She pointed the thing in Sophia’s general direction (though it was kind of hard to tell if that was the case given its shape) and then did an action that she could only assume was pulling the trigger.

It did, in fact, sting a bit. Like she had spent a few solid minutes dragging her feet on the carpet in winter while wearing wool socks and then touched a doorknob, but for her whole body and it lasted a lot longer than static electricity typically did. A while, long enough that it started to go from mildly unpleasant to very unpleasant, at which point it stopped. “There we go! That should probably do it.”

“... Probably?”

“You would be my first test subject for this thing. Don’t worry it definitely worked probably. I can’t imagine why it wouldn’t work, this isn’t exactly a hard procedure to do normally so a machine’ll have an easier time probably.”

“Probably.”

“Probably,” her mom repeated firmly. “If you’re worried, we can always go test to see if it worked in a safe, controlled environment.”

And that was, in a roundabout way, how she found herself on the shores of Lake Superior in a swimsuit, staring down at the frankly not very hospitable waters. The plan was to just dip her fingers in and then if they didn’t grow she’d have a nice little day on the beach and if they did oh well the city was only a few hours away. “This does not strike me as either safe or controlled,” she muttered to herself. At least there weren’t a lot of people around. Because it was kind of shitty weather for a beach trip. It was cold and overcast, dark clouds hanging heavy in the sky. They were going to burst at any minute, which meant that she was gonna get wet either way. Nice little day on the beach her ass. If it had been up to her, she’d have gone with the bathtub. Maybe a private pool. Definitely nowhere public, and certainly not the biggest of the Great Lakes.

“... I should probably get going,” Sophia said. The longer she delayed, the more likely it was that rain would force her hand. And if there was any way to get exposed to water that was neither safe nor controlled, it was getting caught out in a storm. Her mom, pointedly, was waiting in the car. At least she hadn’t left outright – and she had a cell phone out and ready to call up a specialist the second things went wrong. Which, of course, raised the implication that she expected things to go wrong but whatever. It was way too late to object at this point.

Still, she was tentative for obvious reasons. It was fucking cold, of course she didn’t want to go for a swim. Even just standing on the beach was unpleasant. she could feel the wet sand forming a thick, sticky crust on her feet. Which would have been worse if she weren’t a marine mammal – she was built around getting sand stuck to her fur, after all. The problem was that if this didn’t work then washing the sand off without her feet getting bigger would be a massive pain. At least, she supposed, the bad weather also meant there was no one else on the beach, so if things did go wrong she wouldn’t have an audience.

There was a deep rumble in the distance as, somewhere, the thunderstorm began. It had not yet reached her, but that was only a matter of time. Better to just pull the bandage off now rather than wait for it to get worse. She took one last moment to steel her nerves and then strode forward across the beach and into the gently lapping tide.

That was, in retrospect, a mistake. In her defence it was understandable that she didn’t see it coming, but she kind of liked that swimsuit.

The second her feet got wet there was a loud thoom as Sophia abruptly found herself very, very, very big. She couldn’t really make an estimate as to her exact size, off the top of her head. But she could make a decent guess, as the sudden growth resulted in her losing her balance and falling forward, her fall cushioned by the water. All the water. Because she was big enough to fit in Lake fucking Superior. The splash was catastrophic, sending tons upon tons of water up and out of the lake, and her sheer mass meant the flooding was probably of biblical proportions. She tried really hard not to think about the property damage and destroyed homes, which was actually a lot easier than she would have thought.

Because, you see, it turns out growing several hundred miles in one explosive burst felt really fucking good. Who knew? She also tried really hard not to think about that because right now she was very, very, very big and there was no fucking way she was going to be able to deal with things without a very large number of people seeing. Fuck, her clothes hadn’t even slightly survived the growth spurt, so everyone with a line of sight to her who wasn’t busy evacuating had definitely seen her naked. Which, considering how big she was, was probably a lot more people than it initially sounded like. Fuck, she was probably visible from space. The thought sent a tingle down her spine and into her, uh, her lady bits. That was something about herself she wasn’t aware of until now. Excellent time to be discovering kinks, Sophia. Good job. “Oh my god. Oh my god. Oh my god.”

Step one, she supposed, was to stop panicking. That wasn’t working, though, so she decided to skip to step two and get herself standing so she was, at least, not displacing quite so much water. That, initially, worked better, but then she found herself leaving the breathable atmosphere. She could tell immediately, the second she was high up enough, because very suddenly she couldn’t breathe. The sensation was terrifying and she reflexively pulled herself back down into the water with another apocalyptic splash. “I thought macros were supposed to be able to breathe in space...” she muttered, though now that she said it out loud it kind of sounded on its face ridiculous.

“It depends on the macro, actually.”

Sophia had absolutely no idea where this other person came from, though she decided not to look a gift horse in the metaphorical mouth. “It does?”

“Aye, there’s lots of ways to become a macro an’ some of them come with built-in countermeasures to the pitfalls of becoming too big to fit on the planet. But other times ye’ gotta finagle things. Like, for instance, breathing in space. You’re new, so obviously ye dinnae know how to do any of that on your own. That’s what I’m here for!”

“Oh.”

“You seem to have some magic going on, or else ye’d not be able to talk at this size. Are you short of breath?”

“Not unless I try to stand up.”

“Ah, then it’s an easy fix.” There was a sharp snapping noise. “There. Congratulations, ye can breathe in space now.”

“Okay.”

“Dinnae worry about any more collateral damage either. We cannae do much about what’s already done, but we can prevent any more damage.”

“Okay,” Sophia repeated, very slowly sitting up. In spite of the stranger’s reassurance that a lack of atmosphere was no longer an issue, she couldn’t help but be a little apprehensive. Suddenly not being able to breathe had been, frankly, kind of terrifying. Certainly it had gone a long way to temporarily calming down her libido, though now that she found herself sitting up and not unable to breathe it started to rear its ugly head again.

Which was exacerbated by the stranger being, quite frankly, extremely cute. She was an otter, slender and lithe with long, wavy red hair, glasses, and freckles. Also she was completely naked, that helped too. Or didn’t help. Right now Sophia wasn’t sure if being horny was acceptable or not, though the fact that the otter lady was naked did lend some weight to the idea that it was okay to be turned on. Still, she felt a bit awkward and so just cringed into herself slightly.

“This was obviously an accident, so we’ll handle any legal issues relating to the damages for you. Dinnae worry, we’ve got excellent legal representation for this exact kind of situation. You wouldnae be the first person who did some catastrophic property damage that we’ve covered for.”

“That... sounds a bit too good to be true.”

“It’s not, don’t worry. The boss might be back at some point to offer you a job, but there’s no obligation to accept. Think of it as a mutual interest. If we offer legal defence for macro-related accidents then it helps create a precedent which is useful for when we cause macro-related accidents.”

Which raised an obvious question. “Okay. Who is ‘we’ then?”

“Ah! Yes, right, my apologies. My name is Caitlin Nimue. I work for the Hole in the Wall Bar and Grill.”

“A... bar and grill?”

“And extremely high-end magical brothel, yes, though obviously we don’t put that on any of the public-facing signage.”

Oh, well, okay, that explained that then. Of course, it also raised several more questions in the process, but Sophia wasn’t exactly hurting for time, and Caitlin seemed to be amenable to answering. “So, um, you’re a prostitute?”

“Executive assistant, actually,” Caitlin replied. “Though everyone on the executive team does prostitution work as well. It’s very lucrative. Fun, too!”

“Okay.”

“I’m quite good at it, I’ll have you know. After we get the logistical stuff done with I’ll show you.”

Sophia blushed furiously. “R-right, um, speaking of which-”

“Yes! I’m nae just an ordinary secretary, I’m also something of an expert in your particular situation. We’ve actually got a lot in common, besides just being marine mammals.”

“We do?”

“Well, you’ve obviously got summat t’do with ye and water, aye?”

“R-right. Well, um. About a year or so back I started noticing that when my body parts got wet they’d grow, and it’s been getting worse and worse.”

“Mhm. That seems a long way off from growin’ a few hundred miles tall ‘cause ye went for a wee swim, though.”

“Well, um. My mother said it was because of a magical blockage and she used an... experimental invention to dissolve it.”

“Aye, there’s your problem.”

“I kind of figured.”

“She wasn’t wrong that ye’ve got a nasty magical block. Quite a lot more than an amateur could easily dissolve, actually, which is why it’s very much still there. The problem is that you seem tae have some, ah, interesting ancestry ye likely didn’t didn’t know about that is expressing itself very strongly. Specifically, ye seem to be fully half selkie.”

“Selkie?”

“Long story short, they’re a type’a water spirit. Which is where I come in.”

“You’re also part water spirit?”

“Fully, actually. Specifically I’m a Fae. I think the term is Asrai? Or possibly Nixie? I know I’m nae a kelpie because those are always equine, I think.” Caitlin shrugged. “I dinnae ken the specifics, back in the day non-fae came up with a lot of different terms for fae, but tae us we’ve always been just fae, sometimes with different elemental alignments. I’m a water spirit’a some sort, is the point.”

“So, um, you know what’s up with me?”

“Whatever your mother did to ye, it seems tae have dissolved some of your magic block, but in the process it... amplified things that were already there. I could go into much greater detail, but I’m an expert and you aren’t so layman’s terms are called for. You’ve got a lot of magic in ye, and you’re gonna have a lot of magic in ye for the rest of your life.”

“How, um. How much magic are we talking, exactly?”

“Darn close to Dragon levels.”

“Holy shit.”

“Aye, that’d be why you’re so big right now. And before you ask, around three to four hundred miles. I cannae give more specifics, I dinnae have as good an eye for exact heights as the others.”

“Holy shit,” Sophia repeated. It was, really, all she could think to say. Three or four hundred miles was a hell of an escalation from her hands getting bigger when she washed them.

“Aye, it’s a lot for your first time. That’s, ah, not exactly uncommon though. Ye wouldn’t be the only person whose first time was a lot.”

“Okay.”

“Anyway! The good news is that it does seem tae have worked, mostly. The blockage is cleared enough that you should be able tae get rid of it on your own. The bad news is that your magic reserves are a lot bigger than they should be and that’s goin’ tae take some gettin’ used to.”

“Okay.”

“In the meantime, there’s goin’ tae be some growing pains. Like, for instance, goin’ for a swim and comin’ out the other end the size of a small European country.”

“Okay. Am... Am I going to have to get used to that, then?”

“Probably not,” Caitlin replied. “That’s the kind of thing that happens when you’re still getting used tae magic. Not to say that it’ll definitely go away forever on its own, but as you learn control you’ll be able to turn it on and off. If you learn control, of course.”

“I, um. I think I want to learn control.” Not that this wasn’t really hot, of course. Now that she was in no danger of suffocating, she had to admit that being this unbelievably massive felt kind of good. Really good, actually. But, well. “It’s not really very convenient to grow massive every time I get wet.”

“Usually it’s the other way around. Ha ha.” Caitlin awkwardly laughed at her own joke before getting back on track. “It probably won’t be quite this much every time. It’s very likely that whatever your mum did changed the rules in addition tae amplifying things. Obviously we’ll need to do some testing before we say anything concrete on that front, but I dinnae think that you’re in any danger of growin’ four hundred miles tall every time ye take a shower. It’s just that going skinny dipping in the biggest lake in North America skewed things very big.”

“Right. Yeah. That was a bad idea.”

“Not that bad an idea. Ye and your mum couldnae have predicted the rules would have changed.”

“Right. Still, um.”

“I’ll put you in contact with some affordable magic tutors who specialize in this kinda thing after we’re done here. And, in the meantime, I can give ye a crash course now, on the house.”

“Okay, thank you.”

“Ye look like you could use it.”

“Mnf.”

“You’ve kinda been touching yourself.”

Sophia yanked her hands away from her breasts and crotch, placing them firmly over her face to hide the immediate furious blushing. “Sorry.”

“Hey, hey, no need to be embarrassed. I’m a prostitute, remember? I’m used tae people getting horny around me.”

“Mnffff.”

“Besides,” Caitlin continued, standing up and walking over to stand over Sophia’s prone form. “Of course you’re horny. You’re naked. Tens of thousands of people have seen ye naked. You’re next to another lady who is also naked and who is, if I do say so myself, quite attractive and who said she intends tae have sex with you. And tae top it all off, you just grew several hundred miles in one go, and growing feels good. It always feels good, every time, no one really knows why but it does.”

Sophia’s blush deepened as she tried and failed to not think of all the people who had seen her grow. Who could probably still see her, and likely hear all of this too. “Dinnae worry,” Caitlin said, kneeling down while still straddling the seal. “I’ve dealt with the audience. It’s a bit technical, but right now we’ve got one hundred percent privacy and no consequences to any, ah, property damage we cause in the course of funtimes.”

“I-” Sophia’s response was interrupted by Caitlin leaning in and kissing her.

She tasted nice. Crisp and refreshing, like a glass of really high quality water. The otter pressed her body against Sophia’s firmly, squishing their breasts together which was also very nice. After a moment, probably sooner than Sophia would have preferred, she broke the kiss and pulled away. “Normally I’d charge for this.”

“Mnnnnn.”

“Would you like me to keep going?”

“Yes please.”

“Okay! I get the impression you’re still a bit, ah, new to sex.”

“I only just turned eighteen,” Sophia clarified.

“Virgin then? Okay, I’ll keep things relatively low-key. Or, you know, as much as I can.”

“Is it... difficult to keep things low-key?”

“Aye, you’d be surprised. When you’re in a weight class as high as we are, it can be tough to tone things down. Luckily, I get the impression that you’re not really into low-key.”

“Mnfffff,” Sophia groaned as Caitlin pressed her body against her again.

“Just a guess, of course. If I’m goin’ too far at any point, just let me know, aye? It’s no fun if you’re nae having fun.”

“Okay. Um.”

“We can also use this as a learning opportunity. Remember, you’re part selkie so ye’ve got similar magic to me, which means a lot of the tricks I know, you’ll probably be able tae learn yourself.”

“Right, so... um. What kind of tricks?”

“Object lesson time,” Caitlin said, pulling away and up, back into a kneeling position. “As water spirits, we both have an affinity for any fluid based magic, not just water. You can probably already guess how that would be useful for sex.”

“Mnf.”

“For instance...” Caitlin placed her hands on Sophia’s chest.

“What are- Ah!”

It was immediately obvious what Caitlin was doing. It wouldn’t be the first time that Sophia’s boobs had been embiggened – she wasn’t going to pretend that after figuring out her trigger she hadn’t immediately intentionally gotten her chest wet. Literally the first thing she’d done was get in the shower and make her boobs so big that she couldn’t stand up and then masturbated until they shrank back down. So the sensation was familiar, though not exactly the same. New flesh bubbled up into existence underneath the otter’s hands, pressing into them. But there was also something else, a tightness that hadn’t been there before. Which made perfect sense – Sophia wasn’t an idiot, she absolutely knew what Caitlin had meant when she said fluid based magic could be useful for sex. The otter gleefully squeezed and groped at her slowly but surely swelling mounds, prompting droplets of moisture that honestly given their sheer scale were probably a hell of a lot more than droplets. More like small lakes, which quickly escalated into raging rivers, and then twin waterfalls of milk that put Niagra to shame, and then more.

God, they were huge. Sophia was not, if she said so herself, an unattractive seal. But her natural proportions weren’t exactly generous. Not small, but svelte. Definitely nowhere near the behemoths she found herself saddled with. God, they had to be bigger than her head – and, considering that she was currently tall enough that she couldn’t stand up without being in space, that meant a hell of a lot more than it normally would. Calling ‘em mountainous would be a fucking understatement. Big, leaky, and yet paradoxically so full that they almost looked fake.

“How are you feeling?”

“Full.”

“Aye, that makes sense. Here, let me give you a hand with that.” Caitlin moved her hands from on top of Sophia’s breasts to the sides and then pressed them together firmly, resulting in gouts of milk so damn big that Sophia was pretty sure they reached escape velocity. God, and they’d only just started, too. This was just foreplay. Sophia both dreaded and eagerly anticipated actually starting to have sex.

“Y-you were right, by the way. You’re really good at this.”

“I’m not going tae deny it. Just remember to compliment me again once ye’ve got a wee bit more experience under your belt, aye?”

“R-right, yes. I’ll keep that in mind.” Sophia tried not to think to hard about the implication that they would likely be in regular contact after this? And that that regular contact would involve sex? To say nothing of the also present implication that she would likely be having sex with people other than Caitlin, which was A Lot for her right now.

“Besides, we’ve barely even gotten started. This is just foreplay.” Caitlin continued, echoing Sophia’s own thoughts.

“So, um-”

“I figure we can take things slow rather than diving into the deep end right away. Give you some time to adjust to, ah, your new endowments. Speaking of which, why don’t you try givin’ ‘em a squeeze?”

“R-right, um.” Sophia moved slowly and tentatively, placing her hands right where Caitlin’s were – and then, after a moment of hesitation, pressed them together as hard as she could. “Ah!” It felt good, of course. It had felt good when Caitlin did it, it only made sense that it felt good. Another pair of milk geysers rocketed into orbit, moreso than the last one because Sophia decided not to let up on the pressure. Instead, she squeezed harder, aggressively groping herself as the pleasure crested higher and higher. God, was she gonna get off just by squeezing her tits? Not even touching her sex?

“You seem tae be havin’ fun! Let’s escalate a bit, shall we?” Clearly Caitlin wasn’t going to just sit there and let that happen. She slid back, dragging her own wet pussy along Sophia’s torso and then back up. “What’re ye comfortable with, by the way?”

“I, mnnnn~” Sophia made a good faith attempt at answering and failed miserably because she felt too good. The lingering horniness from growing and from being seen growing and the fact that she was so big and Caitlin was also big and cute and naked and rubbing against her was all too much. Her muscles locked up and an electric shiver travelled down her spine directly to her crotch, and her whole body quivered as she came. A lot. Like, a lot a lot. If she were still at a normal person’s scale it would have been gallons, but she wasn’t and so instead the volume was unfathomable, arcing across the continent like... well, the scale was so vast that Sophia’s sense of metaphor failed her.

“I made ye a squirter, by the way! Yer welcome!”

“Th-thaaaaaanks...” Sophia said in between heavy panting as her orgasm washed over her, slowly but surely dying down. “Mnnn. That... that was-”

“Still just foreplay!”

“Right.”

“Now, I think it’s still a wee bit early to be doing any penetration, but you just got to cum which means that it’s my turn, aye? That seem fair?”

“Mmm. Y-yeah. Um, yeah, that seems fair.”

“Okay! Just gonna turn off the ol’ concealment spells and we can get tae escalatin’.”

“... Concealment spells?”

“Concealment spells,” Caitlin replied as she very briefly stood up to give Sophia a better look, and then snapped her fingers.

Sophia did not really have much in the way of experience with penises, so she could not really tell you if Caitlin’s was relatively big or relatively small, which was further skewed by the fact that they were both currently macros. “I’m a grower, not a shower~” she said, which seemingly confirmed that it was small? But also that it wouldn’t stay small for very much longer? Or maybe she was just being sarcastic. Sophia wasn’t exactly in the state of mind to parse sarcasm right now, obviously. “Ah, though I suppose you don’t have the frame of reference for that, do ye?” Caitlin continued, as though reading Sophia’s mind. “It’s nae smaller’n average, about three or so inches. Or, you know, that much proportional to my normal height. I dinnae have the head for numbers some of the other girls have, so I couldn’t tell you how big it is now. Few miles, probably?”

“Oh, um, okay. And how big is it when it’s, you know...”

Sophia trailed off, but Caitlin’s knowing smirk was proof enough that she had intuited what was going to be asked. She did not, pointedly, give an answer. Instead, she took a few steps forward and around, very quickly moving from straddling Sophia’s torso to straddling her face. She had a very nice butt from this angle, and a very substantial tail. Which, obviously, she was about to get a much closer look at. “I think it’d be easier to show than to tell.”

With that, Caitlin unceremoniously sat on Sophia’s face. There was a thud that, given the sheer scale of both ladies, was probably actually literally earth-shattering, though obviously Sophia couldn’t see the results. Caitlin didn’t miss a beat, grabbing Sophia’s arms and placing the seal’s hands on her hips. “Squeeze,” she said – ordered, really, although she was very gentle about it. Less a command and more... a lesson, really. Giving the newbie a hand in handling this situation. “Don’t worry about breathing, I’ve got that covered. You just get tae lickin’.”

“Mnf?”

“Dinnae think too hard about it. Just lick.”

“Mnf.” Sophia did as she was told. Just sorta stuck her tongue out and pressed it on whatever she could get at – and whatever she could get at, it turned out, was Caitlin’s pussy and also a bit of her balls. She tasted good. The balls were sort of salty and musky, while the puss had the same crisp, refreshing quality as her kiss, with just a hint of sweetness. She had absolutely no idea what to do from here, so she just sort of pressed her tongue even more firmly against Caitlin’s bits and then moved it up and down.

Which was, apparently, the right thing to do, or at least good enough, because it resulted in Caitlin getting moist. “There we go. Good girl.” The otter let go of Sophia’s hands, letting her keep them in place on her own, maybe do a bit of squeezing. She’d gotten the point by now, and Caitlin knew that she’d gotten the point. And Caitlin had more important things to do with her hands. She placed them on either side of Sophia’s still very much full and milky tits, gently but firmly squeezing them together around her shaft. Sophia could feel it in there, twitching and throbbing and slowly but surely taking up more and more space. Pressing more firmly against her breasts, warm and firm and big and bigger. Caitlin began to slowly pump her hips, forward and back, deeper into the abyss of Sophia’s tits with each gentle thrust, bumping her balls against Sophia’s chin.

Speaking of the balls, they were also getting bigger with every thrust, weighing more and more heavily against her torso. Warm and soft and also throbbing, making audible sloshing noises. The musky taste and scent got more intense the bigger they got – and oh boy were they getting bigger. Sophia couldn’t see them, but she could feel them pressing against her chin and her tits, squishing into the limited space and slowly lifting Caitlin off of her face. “Oh no, my balls are gettin’ too big for me to get my cock in yer tits or my ass on yer face. Guess we’re just gonna hafta do some size adjusting. Darn.”

Sophia took the opportunity to take a breath of fresh air – she got the feeling she wasn’t going to get another chance for a while. She also moved her hands from Caitlin’s hips to her balls, because they were frankly the bigger target. She squeezed and rubbed and jostled them, and was rewarded with more audible sloshing as they jiggled back and forth like water balloons. Hell, for all she knew maybe they were water balloons. Sophia didn’t know how water fae worked. She barely even knew the difference between a Fae and a fairy beyond that there was one. Whatever, though, sloshy balls were kinda hot even if they were filled with water. She gave them a squeeze and shoved her face into the cleft between them, which prompted a sharp gasp from Caitlin. “Feels like someone’s getting into things! Let’s pick up the pace a little, shall we?”

There was a sharp noise – the sound of fingers snapping, except moreso. The same kind of unnaturally clear snapping sound as when Caitlin had cast a spell earlier. Which, obviously, was what had happened. There was an audible fwoomph as her boobs doubled in size (again). It was kind of weird how familiar the sensation of her boobs embiggening had gotten at this point. She kinda wanted to give them another squeeze, but right now her attentions were somewhat monopolized by Caitlin’s balls, which quickly grew over her face, leaving her once again buried under the otter. Just, you know, balls instead of ass. Much more thoroughly, too, Caitlin wasn’t exactly packing a lot of junk in the trunk. A grower, not a shower, as she’d put it. Lightweight and lithe, but with plenty of room to grow.

And, again, boy was she growin’. Even in spite of Sophia’s tits getting bigger, she could already feel that the dick had outgrown them again. Erupting proudly from the underboob, farther and farther the harder it got. Just how big even was she? It just kept on going and going and going. Every time she thought it was fully hard, it somehow got bigger. Occasionally, Caitlin pumped some more growth magic into Sophia’s boobs to help them keep up, barely, but most of her attention seemed to be focused on thrusting. She idly rocked her hips backwards and forward, over and over, in the process rubbing her giant fuckin’ balls all over Sophia’s face. She couldn’t understate just how fucking massive they were, especially considering how big the two of them were. At this point, she wouldn’t have been surprised if there were actual celestial bodies smaller than her nuts. Large asteroids, some smaller moons, maybe even some dwarf planets? Of course, on the other hand, it was kind of hard to get a good feel for how big they were from where she was right now. Her perspective was just a little bit skewed towards the big, given just her face was currently buried by them completely. She could hear a loud, sloshing, churning noise, and she wasn’t entirely sure whether that was her own blood pressure or Caitlin’s balls. Possibly both? It was hard to tell. The overwhelming musk made it hard to think straight and frankly she also didn’t really care?

She was pretty sure she had bigger concerns, after all.

Caitlin’s thrusting got more intense and erratic, and she groped at Sophia’s boobs with increasing gusto. “Mnf. I think that’s good enough for now,” she said as she reluctantly pulled herself up. Sophia took the opportunity afforded to take a deep breath of fresh air and clear her head, just a bit. She was pretty sure that she knew what was going to happen next. “I want tae cum inside you.” Yeah, that tracked.

“That’s going to be... difficult, I think.”

“Ha, you wouldn’t be the first newbie tae underestimate me. Dinnae fret, if I say it’ll fit, it’ll fit.”

“If you say so.” Sophia’s attention was locked firmly on Caitlin’s cock. Once again, given just how absurdly big they were at the moment, she couldn’t even make an estimate as to how big it was, but also she didn’t really need to – it was bigger than Caitlin was.

“Like I said, if I say it’ll fit, it’ll fit. Now open wide.”

“... If you say so.” Sophia was not particularly reassured, but Caitlin had yet to prove herself untrustworthy. If she said she had contingencies in place, she was probably telling the truth. She wasn’t sure why she trusted this almost complete stranger so much, but she just didn’t seem like the type to intentionally or negligently hurt her sexual partners. So Sophia did, in fact, open wide.

Caitlin slid her shaft in between Sophia’s cleavage. Slowly, lest she set herself off too early. “Ahhh, I made yer tits too nice,” she groaned, biting her lip. “Guess I should’a gotten tae this bit earlier, now I’m right on the edge. And you’re very soft.” She kept pushing, slowly, carefully, until the flare popped out of the other end, prodding firmly at Sophia’s face. “G’wan, I’m sure ye can figure out what tae do next, kid.”

Sophia had, obviously, never sucked a dick before. But Caitlin was right. It wasn’t exactly rocket science – she opened her mouth as wide as she could and moved her head forward. Caitlin’s flare was too big to properly fit in her mouth, but she did her level best. She could at least manage the next best thing, kissing and licking and sucking on the head itself. She also got her hands in on the action, jerking it off as best as she could. Which, granted, wasn’t much. It was so big that she would need several pairs of hands and much bigger tits to effectively tend to even most of it.

However, she didn’t actually need to effectively tend to most of it. Caitlin was already on the edge of orgasm, she just needed something to push her over that final hurdle. A straw to break the camel’s back. And it turned out that some licking and stroking was a plenty good straw, especially when you factored in that Caitlin herself was getting in on the action. She’d placed her hands on Sophia’s tits and was eagerly titfucking herself in rhythm. Which very quickly became out of rhythm. Her breathing became heavy, her thrusting wild, her cock throbbed in time with the quickening rhythm of her heart. It spurted thick gouts of translucent fluid in Sophia’s face and down her throat. “Mnnn, f-fuck,” she groaned, in time with an exceptionally copious rope. Practically a steady flow at this point, getting thicker with every passing second. It tasted slightly sweet, and very refreshing. The overwhelming volume would, under normal circumstances, probably have been enough to drown her. Presumably Caitlin had pulled some magic shenanigans or another. Maybe it had to do with her sudden ability to breathe in space? Maybe it was something else.

Whatever it was, it was a good thing that Caitlin had done it because this was just precum. And, given the audible rumbling and the way her cock bulged, Sophia was pretty sure she was no longer just on the edge. “F-fuuuuuck~” she cried, which was the last notice that Sophia got before-

Well, before the obvious. There was a lot of the stuff, and it came out extremely emphatically. Some of it went into Sophia’s mouth through the sheer force of the orgasm. Most of it didn’t. A lot of it somehow managed to reach escape velocity, forming a milky off-white ring around the planet. Really drove home the sheer size of the sex they were having right now. From Sophia’s perspective, this climax was already absurd, hundreds of gallons of spunk. But Sophia’s perspective was skewed – this wasn’t just a lot of cum, it was an apocalyptic amount of cum. Easy to forget that at times, but every now and then there was an undeniable reminder. Like, for instance, the fact that Caitlin had created a ring of cum around the planet earth. “Holy shit.”

Caitlin took a few more minutes to reply, mostly because she wasn’t finished cumming. That went for a good while, longer than Sophia had expected it to. She had underestimated the sheer monstrous size of Caitlin’s cock, she supposed. She continued on erupting, gout after gout after cataclysmic gout of otterspunk, enough that it could flood the planet were it not hitting escape velocity. She could feel each load travelling up between her tits in waves, over and over and over, the shaft almost doubling in girth each time.

It was, surprisingly, not that hard to judge how much time passed. Given their sheer size it was a lot easier to notice the earth’s rotation. The problem, of course, was translating those rotations into actual useful units of time. An hour, maybe? Longer than orgasms typically lasted, in Sophia’s admittedly limited experience relative to the professional prostitute. Somehow she didn’t lose her mind from boredom? She probably owed that to Caitlin eagerly squeezing her giant fucking tits, unleashing even more fuckin’ milk on the earth below them. The cum wasn’t flooding the earth but the milk sure fuckin’ was. Goodbye, Great Lakes, new dairy capital of the United States.

Eventually Caitlin’s output slowed down. It did not stop, though, and if anything the slower output meant more ended up in Sophia’s mouth and flooding the ground beneath them, mingling with the milk. It was a few more minutes(?) before it reached the point where Sophia could say it had stopped. And even then, it hadn’t really stopped. There was still copious amounts of precum, but just precum. That meant that they were done, or at least she assumed.

“Ah, that was nice. Good solid bit ‘a foreplay.”

“... that counted as foreplay?”

“A titfuck an’ blowie? Aye, that absolutely counted as foreplay. We ain’t even put it in yet!”

“I’m still not sure how I feel about that.”

“Ahhhh, it’ll be fine. Trust me, I’ve put much bigger dicks in much smaller gals and none of them got hurt.” She paused, tapping her chin in thought. “Well, unless they asked for it. Some people’re intae that kind of thing, ken? But-”

“I think I’ve heard enough.”

“Aye, fair enough. How about we take a few minutes to cool down before moving on to the main event.”

“I could have sworn that was supposed to be the main event.”

“If you think I’m just going tae stop at a titfuck, you’re underestimating the situation you’ve put yourself in, kiddo.” Caitlin pulled herself off of Sophia and then held out a hand. “Here, lemme help you up at least.”

“Right, yeah.”

“Why don’t you stretch your legs a bit? Go for a walk down to the pacific maybe.”

“I can’t believe you said that so casually.”

“You’ll get used to it.”

“It’s gotta be thousands of miles away!”

“Aye, it’ll take ye a good few minutes.”

“... right.” She wasn’t wrong, of course. Just came off as a bit too... used to the situation. And Sophia wasn’t used to the situation, of course, so the whole thing kinda threw her off balance. And speaking of things that threw her off balance, being... however many hundreds of miles tall she was. She hadn’t actually had to walk while macro yet, and so she hadn’t had time to get used to the radical change in height. Among other things. “How do you even manage it?” she said, taking several shaky steps westward.

“Ye get used t’sudden changes in your centre of gravity eventually,” Caitlin replied. “It’s actually not as bad as it seems at first. Most’a your specific problem is probably your tits, not your height.”

“Right, yeah, that makes sense.” She had already suspected that was the case. Standing up somehow made them seem even huger than when she’d been lying down. God, at this point they had to reach her fucking knees. It was hard to tell because she couldn’t actually see her legs over them, but she could definitely feel her thighs bumping into them with every step she took, jostling them and prompting more catastrophic leakage.

She made her way across the country, leaving a trail of devastation and milk all the way from Duluth to coastal Oregon or possibly Washington she wasn’t really sure and real life didn’t have state lines drawn on it. It really didn’t take all that much time, only a few minutes as Caitlin had said. Not nearly enough time to cool off, now that Sophia actually thought about it. “Maybe I should walk back?” she said to herself. It was the only thing she could really think to do aside from standing on top of whatever poor town she had underfoot. She couldn’t help but cringe, just a little, at that thought. Even if Caitlin did claim that she didn’t need to worry about property damage. It was a bit late to be worried about the path of destruction she’d already carved through North America, though. Between her footsteps, the milk, and her tail dragging its way behind her, she doubted there was all that much left on her path. She didn’t want to turn around and look, but at the same time what else was she going to do?

“Sorry about this, by the way. I wanted tae test something out, but I figured it would work better if I caught you off guard.”

“Huh?”

Sophia made the decision to turn and face Caitlin, which it turned out was a poor one – her boobs swung heavily behind the rest of her body, which left her off balance enough that all Caitlin had to do was give her a little shove. “Hup!”

“Ack!”

Sophia toppled backwards effortlessly. She tried her best not to, but that probably just made it worse. Instead of properly bracing herself, she landed butt-first in the pacific ocean with the full force of several quadrillion tons of seal.

Which was quickly followed by another catastrophic thoom as Sophia abruptly found herself filling the entire damn thing. “Ah, I was right.”

Sophia sputtered and stammered in an awkward attempt to respond, before quickly realizing she had higher priorities. The pacific ocean was, after all, very big, and she found herself filling the whole thing – which put her at a comparable size to the entire fucking planet. Big enough that she found herself having to fight to stay on the earth. “A-ah! Help!”

“Ah, right, this’d be your first time too big tae fit on earth, aye? Dinnae worry, it’s not as bad as it seems. Y’just got tae get used tae it.” Somehow, Caitlin had already grown to roughly match her, and was currently lazily floating in a low-earth orbit. “Think of it like being underwater. It’s a little harder tae swim in, obviously, because it’s mostly a vacuum. But there’s just enough microscopic space debris that once you get used to it marine mammals like us can basically swim.”

“Th-that’s easy for you to say! I’m gonna fall off!”

“It’s actually a lot harder tae fall off of earth than you’d think!” Caitlin replied.

“Why did you push me!”

“Like I said, I wanted to confirm something. The good news is I’ve figured out how your abilities work! And that means it’s gonna be much easier tae manage ‘em!”

“I already figured out how they work,” Sophia responded, though she found herself a little bit unsure. Caitlin was an expert, right?

“Aye, but that was before your mum meddled with things. Magic is a fickle thing, and tryin’ tae meddle with things like a blockage without knowing what you’re doing can make the rules change.”

“I figured it was just, you know, the same but moreso.”

“I considered it, but ye didnae get bigger from the rain.”

“The- oh!” Right, in the heat of the moment, Sophia had forgotten that it had been about to rain.

“Right, if your powers still worked the same way then growin’ intae the rainclouds would have made you grow even more. With how explosive your growth is, we woulda noticed it. But you didnae grow more until you hit the ocean. So I figured the trigger had changed.”

“Okay. And... you pushed me into the ocean to try and figure out what it had changed to?”

“I had some ideas, and we’ll have tae do a little more testing to be absolutely sure. But I’m fairly confident that you grow to fit whatever body of water you enter.”

“Oh.”

“Like I said, I’d like tae do a bit more experimentation. Ideally on a, ah, slightly less extreme scale? But at this point I’m fairly confident that’s the rule. And now that we know that, we can hopefully fix it so that ye can go for a swim without fillin’ the pool every time.”

“Okay. That, uh, that sounds convenient.”

“Instead you’ll only do that when you want tae fill the pool~”

“Mnf.”

“That can wait until later, though. Right now you’re about the size of a good-sized moon and you’re very obviously horny so I’m going tae introduce you to the joys of space sex.”

“Oh.”

Caitlin languidly floated over. It really was just like she was swimming through space. “Come on, let’s get away from the planet so we’ve got a bit more room.”

“R-right.” Caitlin held out a hand, and Sophia gingerly took it. The otter gently but firmly pulled her off of the planet and then held her hand as they swam off into the endless abyss of space. It kind of had a romantic vibe to it, though also Sophia was fairly sure Caitlin was only doing that because Sophia hadn’t gotten used to swimming in space yet. She made an attempt at moving on her own, but couldn’t quite find purchase. It felt like she was underwater but without any actual water. That meant there was nothing to swim against, and also that there wasn’t any resistance which meant her limbs moved faster – which, paradoxically, made swimming harder.

“Oh, by the way, are ye okay with me givin’ you a penis?”

“Huh?”

“I’m takin’ that one as a yes!” Caitlin snapped her fingers, and the obvious happened. It was big, of course. Sophia got the feeling that she didn’t really do ‘small’, at least not when it came to cocks. It wasn’t as Caitlin’s, but that wasn’t exactly saying much. It was still long enough that she could probably suck it, and girthy enough that she probably couldn’t. It was accompanied by an equally prodigious set of balls, big enough they reached her knees. “I figured we’d go slowly for now, since you’re nae used to this kinda thing yet.”

“This is slow?”

“It’s nae even the size of your leg, it’ll be fine.”

“If you say so.”

“I do say so!”

“Okay well you’re going to have to do most of the work because I can’t move.”

“Aye, we’re going tae hafta work on that, too.”

“... I really don’t think being able to swim through space is a skill I’m going to need to use often enough for it to be worth developing.”

“You’d be surprised!” Caitlin effortlessly floated over to Sophia, licking her lips eagerly. “Now, let’s get tae the climax.”

“R-right. Yes’m.” Sophia had other things she wanted to say, but all of them seemed to fade into the background when Caitlin gently exhaled on her shaft. How the fuck she even did that when they were in space? She didn’t know. Magic, probably. She didn’t fucking care because it felt really good and basically every other concern got washed away by pleasure. It just felt too good.

And then Caitlin actually put the dang thing in her mouth and holy shit. It wasn’t overwhelming, but if anything that was even more impressive. Sophia was definitely on the edge of climax, she’d never had a dick before but she wasn’t stupid she could tell when she was about to cum, and it was very big and very sensitive and frankly if Sophia had touched it she would definitely have cum. But Caitlin was doing way more than just touching it. She had the head in her mouth and was eagerly circling it with her tongue while gently stroking the shaft and oh man it felt good, but not quite good enough to cum. Dancing on the edge of climax, Sophia’s hips quivered and quaked and bucked, unleashing copious amounts of precum – and only precum.

Caitlin smirked, and then darted forward, taking the entire rest of the damn thing in one go. All the way to the hilt. Holy shit Sophia had no idea how she wasn’t cumming just from that alone. “Aaaahhhhh!” Caitlin somehow managed to smirk even wider, despite her mouth being obviously occupied. She had every right to be smug, though – she was fucking good at this. A fucking expert. In multiple senses of the phrase, even! She started to really suck cock, in earnest, moving up and down and up and down and up and down, from head to hilt to head to hilt, over and over again, faster and faster and faster and faster. And yet, somehow, Sophia didn’t cum. She could feel it building, deep in her core, but it didn’t quite reach the point where it burst forth. She was dancing on the palm of Caitlin’s hands, and Caitlin didn’t want her to finish just yet. That made sense, she supposed. This was the climax, after all.

And speaking of climaxes, Caitlin snapped her fingers again and Sophia’s balls began to grow. “A-ahhhhhhnnnnn! Fuck!” She only got another smirk in response, as Caitlin reached down and massaged them as they swelled bigger and fuller, gurgling and churning audibly – which, again, didn’t really make much sense because they were in space but fuck it she didn’t care. She reached down and grabbed the back of Caitlin’s head, pushing her all the way down, as far as she could get her. It was an instinctive action, and one she probably wouldn’t have done under normal circumstances, were she more lucid. But she was so fucking horny, her balls were so big and full and she’d been on the edge of climax for so long that her body just needed to cum, cum now and cum hard. “Fuck! Fuck fuck fuck fuck fuuuuuuuck!!!!!!!”

Either Caitlin decided that it was time, or else somehow Sophia had gotten so fucking horny that she was immune to edging. She didn’t know. She didn’t care. Her vision went white and she came, harder than she’d ever came before. A lot, too, frankly absurd volumes. Making Caitlin’s earlier cumshot look like nothing, even discounting they were bigger than some planets. She came and came and came and came, for... fuckin’... she didn’t know how long, at this point any sense of time was well beyond her. She was in space how was she supposed to even estimate how much time had passed?

And speaking of space and planets, boy was Caitlin big. Clearly, Sophia’s balls the size of fuckin’ Mercury weren’t just for show. Caitlin’s body had been inflated to the point where it outmatched Earth. Sophia could make that specific point of comparison because there she was, right beside the planet Earth, clearly bigger than it. “Holy shit.”

“Aye. This is where I’d normally say that we’re done with round one, but you’re still a newbie so I’d like tae go easy on you. Give you a bit of a break.”

“... Yeah, okay. Thanks.” Sophia let herself go limp, floating in the void. Now that she knew they were done, all of the exertion hit her in one wave of exhaustion. She was more tired than she would have expected but also somehow, paradoxically, nowhere near as tired as she probably should have been after inflating someone to the size of the fucking planet. “So. Uh, how long until this wears off?”

“Depends on what ye mean by ‘this’.”

“I mean, you know.” Sophia paused before doing a vague gesture with her hands like she had just caught a really large fish and was demonstrating exactly how big it was. “This.”

“The dick and tits I can undo whenever, or they’ll wear off on their own in a few days at most.”

“Okay. What about, um-”

“I could shrink ye down now, but I’d advise against it. It’ll wear off in its own time – given how big you are versus how strong you are, I’d give it about five hours? Possibly as much as twelve. And when it does wear off I can’t predict how it’ll interact with shrinkin’ magic. Until you figure out how to undo this on your own, it’s safer tae just let it run its course.”

“Ah. I see.”

“I know, I know, being stuck floatin’ in space for a half a day ain’t exactly riveting, but you’ll find ways tae entertain yourself. Trust me.”

“Right. If you say so.” There was a part of Sophia that didn’t exactly buy that. What exactly was she going to do, connect the dots with stars? Meditate? Maybe take some time to figure out how to swim in space? There wasn’t exactly much for her to do, aside from-

Well, aside from Caitlin. The otter gave another smug smirk, wiggling her tight little booty. Her tail waved back and forth, pressing against and deforming the cheeks, and her still-present balls jiggled with every movement. Sophia’s cock was still very hard and her balls were still very full and she was still very big – and, it turned out, just being big felt really good. “Hey, uh. You said earlier that you were going to give me a break, right?”

“Aye, I did,” Caitlin said, voice tinged with obviously feigned innocence as though she wasn’t shaking her big fat tail back and forth in an obvious invitation.

“I, uh.” Sophia bit her lip.

“Yes?”

“I think I’m done with that break.”

“I figured you would be!” Caitlin said with a friendly smile. “C’mon, we’ve got at least five more hours tae fill, and that’s a lot more time than you’d think!”

“Right.” Sophia made an earnest attempt to float her way over to Caitlin, and in her defence she managed to actually move in the intended direction at a speed greater than zero. That was fine, though, she five whole hours, as much as twelve! That was plenty of time for her to get over to Caitlin, and in the meantime she had a lot of thinking to do. After all, recent events had made her seriously reconsider her intended career path, such as it was. Her plan, until now, had been basically identical to every high-school senior – just sort of wing it until she had to pick a career path and then just go with whatever came to mind and regret it for the rest of her life. As you do.

But, well, she did suddenly find herself hit with a pressing need to learn magic beyond the basic stuff they teach you in grade school. For obvious reasons. And, in the meantime, she suddenly found herself very interested in the idea of magically augmented prostitution for some reason. Maybe. In the meantime, she’d finally reached Caitlin and it was time to get to fuckin’ that otter ass, so that’s what her focus was going to be on for the foreseeable future. That was fine, though. Again; she had plenty of time. All the time in the world.