Best Compatibility

Story by IrritableMetang on SoFurry

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Milo finds a water stone for his Eevee who's finally decided what she wants to evolve into.


“You're ready?"

Milo held out the water stone, still keeping it covered in his hand. Eevee was ready. She didn't want to just be the small, timid girl on the team anymore. After watching how huge and s-sexy~ Scolipede had become after she'd evolved, Eevee wanted her turn. And she could think of no better Pokemon to evolve into than a Vaporeon. She would be big like Absol, sleek like Scolipede, strong like Lucario, and even get a powerful tail like Snivy. It would be perfect. And all she had to do was touch the water stone Milo was holding out to her. She nodded. Milo lifted his fingers, revealing the brilliant blue of the gemstone underneath. He watched as his little Fluff Ball gingerly placed a paw on the mystical rock in his palm. Almost instantly she lit up, a blinding light forcing Milo to look away. It felt incredible. Her body molded itself with the stone's power, growing larger and larger… She could feel as her fur seemed to melt away, leaving her feeling sleek and smooth. Her tail thickened and arched out behind her and fins sprouted around her head, stretching outwards into the open air. It was like she had been filled with an energy that her body couldn't contain, forcing her form to expand outward and change to its will. And by god had it felt good~ As the light subsided, she was excited to take in her new form. After being brown her whole life, it was strange to look down and instead see a pleasant light blue.

“W-whoa…"

Everything still felt tingly and warm. She couldn't resist lifting a paw to run it over her foreleg. Her skin was so smooth…

“How does it feel?"

Milo was looking her up and down with a smile, taking in his newly evolved Vaporeon. She flinched. Holy shit, am I really this tall now? Sure he was still crouched over but it was no less jarring to be at the same eye level after having him tower over her just moments ago. Regardless, she answered.

“A-amazing~"

She couldn't get over just how soft her own skin felt rubbing her fore limbs together. And not to mention the new strength and heft in her now much larger tail. Just lifting the thing gently to feel it bob and flex gave her a startling sense of power. She'd never felt better in her life! Milo reached a hand towards her, stopping just short of her head.

“May I?"

Her heart skipped at the thought.

“Please."

She was so smooth now. Milo's hand glided over her, brushing the fins on her head as he moved down her neck. It was like she was wet, but at the same time no water came off her. Not to mention she was quite soft, and any amount of pressure made his digits sink into her. Strange, but interesting. Vaporeon leaned heavily into Milo's hand. The contact was AMAZING. No longer was his hand just a mass ruffling up her fur, she could actually feel him. The texture of his hand, his warmth against hers… She felt arousal build in her crotch. Her new, slit-like mound begging to be touched as well. Maybe she was enjoying this too much, but she didn't care. She felt awesome right now. And finally confident enough to make a move.

“M-Milo…"

Milo could tell something… erotic was up. From the moment his hand made contact he could tell. The way she trembled, and pushed back against him. The way she made those faces… She'd always been incredibly reserved for as long as he knew her, but he would've had to be blind not to notice that she'd been trying to bust out of that shell for a long time now. And this evolution was probably exactly what she'd needed to kickstart that process. And what better way to show some newfound confidence than to express your feelings for others? Maybe it was naive to think this was going to be just a simple stone hand off.

“Yeah?"

His hand landed on her shoulder, moving behind the fan around her neck. She felt surprisingly warm.

“I feel really good right now."

Vaporeon stepped up onto his lap, shaking as his second hand landed on her side. It was almost jarring to have her be so bold.

“I can tell…"

Vaporeon pressed her head to his chest, flexing her new fins and letting out a big exhale. Milo gently rubbing her sides was really getting to her. She could feel moisture building between her legs.

“I want to."

It wasn't hard to know what she meant.

“If you're sure."

“I am. F-fuck I am."

Doing all this camping on his way around the regions was sure cutting down on budget, but it wasn't doing any favors in terms of romanticism. Again, he'd be laying one of his pokemon in a tent. But it didn't seem like Vaporeon cared at all. Milo barely got the zipper up before she was back in his lap, breathing heavy and rubbing her side against him. Milo rested an arm over her, making her shudder.

“Are you sure you're alright?"

“Y-yes. It just… everything feels so good."

She leaned into him harder, making a small noise as she rubbed against his shirt. Milo ran his hand down to her rear, stopping at the base of her tail. Vaporeon couldn't help but moan. Milo watched as she lifted her new tail, arching it in response to his petting. He didn't have a ton of experience evolving pokemon, but his Scolipede certainly hadn't gotten like this either time she'd evolved. Sure Bubblegum had wanted to explore herself after her most recent evolution, but this was different. It reminded him of when Absol'd gone into heat.

“What's it like?"

Milo moved to take off his tee. Vaporeon reluctantly gave him some space.

“It's all so new, so exciting. And sensitive~"

Now shirtless, Milo reached to heft her tail. She moaned again as he ran his hand along its underside, getting a good feel of the muscly appendage. Finding the flukes at the end were especially tender.

“All these new parts…"

Vaporeon pushed against his exposed chest, reveling in the skin on skin contact. The insides of her legs were totally drenched, her arousal even starting to drip down and wet Milo's pants too. And he hadn't even touched her slit yet. Fuck, I could orgasm like this~<3 She climbed up on him further, pulling her tail away from his hand as she rested her forepaws on his shoulders. She had to work not to stare at the massive bulge forming in his pants. Vaporeon loved how much bigger she was. Getting all up on him like this would have been impossible as an Eevee. Able to press her nose to his, feel his body against her own, and just get oh so… intimate~

“It's almost like I'm melting~"

She couldn't resist pushing her muzzle forward into his lips. Her initial attempt was a bit awkward, but between Absol and his other muzzled pokemon Milo knew how to handle a snout by now. He helped her find a more comfortable position, one where getting lips on lips wasn't so cumbersome. She moaned into his mouth, eager for her first kiss to be a juicy one. And Milo was no slouch either. Her larger tongue wrestled with his more experienced, no corner of either maw left untouched. A passionate show of affection and lust. Milo wrapped his arms around her, getting a much better hold on the lewd fish-mon.

“MmmMmM!"

Vaporeon squirmed against him, losing control as the pleasure of so much contact washed over her. His skin just felt so warm! Her hips jerked as his hands went down her back, flicking strands of her leakage onto both herself and Milo. She pushed harder as his hands went lower, finally reaching her haunches. Moans poured out of the oversensitive eeveelution. She couldn't help herself. Not when every touch felt like she was rubbing herself. Milo crested a cheek, finally making a move between her legs. Vaporeon tensed as his thumb landed on the side of her swollen mound. He pried her open, gently pulling the cleft aside. Her body shivered in delight, craving more. She was so needy for him. It took all her effort to break the kiss and pull back just enough to speak.

“Mm-Milo… lay back. Please."

He smiled, and lowered them both down to his sleeping bag on the tent floor. Vaporeon soon found herself standing over Milo, his hands on her hips and her paws either side of his torso. Seeing him below her like that made her breathing even heavier, and her crotch warm. Milo's view wasn't exactly the worst either, and he could feel his pants getting even tighter. He broke the silence.

“Wow."

Watching him eye her up brought a flush to her cheeks. But she couldn't get flustered now! This was what she'd wanted. It was her time to be confident! To take charge and not be so sheepish anymore.

“Get ready, Milo. Y-you're gonna give me some head."

Milo smiled. Adorable~ Vaporeon cautiously stepped over Milo's head, feeling his eyes trail down her form as she positioned herself above him. He kept his hands on her while she lined up, the view between her legs quite stunning even if a little wet. The whole inside of her hind legs shimmered with her own lube, slickness still leaking out of her new genital slit. His breath on her was excruciating, and she could wait no longer. Vaporeon cooed as her mound came down on Milo's face, his head straddled by two wet thighs. Boy was she drenched. His face was practically soaked the moment his mouth met her vulva. She poured over him, sitting as hard as she could to try and press as much of herself against Milo as possible. And he was happy to lap her up.

“Nah!"

Vaporeon arched her back in pleasure as he explored her folds with his tongue. Fluid practically poured out of her as Milo ate her out, and more yet as he pushed deeper. An exquisite flavor~ It was impossible to keep her hips still. Not only were shivers of delight tickling her spine, but the need to get as much stimulation as possible out of her wet, squishy mound forced her to roll forwards and backwards and grind over his visage. Vaporeon rubbed the underside of her tail over his chest in delight. It was SO much different from the cookie she'd had before. Her slit felt so big, so deep~ And having Milo lick and pry around inside only emphasized those feelings. She pressed down harder, feeling her lips spread even more over his mouth. I feel like I could take a whole fucking Mudsdale~ Milo'd held off on going for her clit too much, fairly confident that if he did this whole thing would be over rather quickly. Especially with how much she was dribbling and shaking from just this light cunnilingus alone. She really was hypersensitive right now. It was addicting to have her trembling at just a single lick, moaning at the slightest penetration. Drooling from even just rubbing her haunches. It was hard to believe this was still the same Eevee that just yesterday had barely been able to ask him if he could find her a water stone. She placed a paw on the back of his head and growled. Was she getting close? Milo hadn't really been able to tell considering her entrance had been flexing and clenching since the moment she'd come down on him, but he figured this was the best que he was going to get. So it was time to really give her a big finish~ Milo forced his tongue deep, scouring for her g-spot as he made a move on her clit with his lips. She tensed and a gush of nectar filled his mouth.

“Aaaah! M-Milo!"

Vaporeon clenched her teeth, barely staving off orgasm and getting herself back under control. That sudden rush of pleasure had nearly thrown her over. But now with him digging around so vigorously, she still probably wouldn't last long. She felt his lips mush against her clit, and was sent right back into another spine arching groan. He must have known she was getting close. Vaporeon clenched over his tongue again, reveling in all the sensation. This was it. She could feel herself tightening up, pressure building in her mound. She was cumming. And just as her orgasm hit, Milo managed to find his mark. His tongue pressed against her g-spot, and Vaporeon cried out as she came. Her taste filled Milo's mouth and her walls tensed around his tongue. The clefts of her slit trembled against his face, and clenched in time with Vaporeon's moaning. Her whole body locked up. Everything refused to work with the exception of her hips which involuntarily jerked back and forth, grinding out more pleasure over Milo's visage. She could do nothing but hang on for dear life as her body overwhelmed itself. She could feel herself quiver over his mouth, his tongue still inside her. It felt like it lasted forever. Such an intense release… Vaporeon tossed her head around, her moans devolving into grunts through her clenched teeth as more and more poured out of her. The wind down was slow, excruciating almost. Everytime it felt like she was coming down, some big spike of pleasure forced a few more hard clenches out of her before the orgasm started to fade again. She was left completely out of breath, panting with her soaked crotch still resting against Milo's face. It was hard to find the strength to get up, especially when you have a seat as comfy as this~ But eventually she peeled off him, strands of girlcum still left connecting her slit and Milo's face even after she pulled away.

“Better?" Milo asked, letting his arms drop and relinquishing his hold on her flanks.

“That… haaa… was amazing~"

Her whole body tingled, and the endorphins were making her head swim. But her body was so tired, the girl's legs barely able to keep herself up. She fell onto her side next to Milo, shivering as she met the soft fabric of the sleeping bag. Her front paws wandered over herself, rolling onto her back and rubbing her own belly as she let the afterglow take her. Milo turned to look at her. She felt pretty content to just lie there for a while…

“Vaporeon really suits you."

She looked over to see Milo watching her, smiling. He must have wiped his face while she wasn't paying attention.

“Really?"

“Yeah. I think you look great."

Milo placed a hand on her stomach too, giving her a little rub and a pang of pleasure.

“Quite the gorgeous form if I do say so myself. Someone must be taking great care of you."

She smiled and pushed his hand into her tummy.

“Couldn't agree more~"

Although as breathtaking as this first orgasm as a Vaporeon was, it almost felt like it wasn't enough. She wanted to feel something reach truly deep, and stretch her wide. Not to mention all this touching was getting her quite worked up again. Her paws left Milo's hand, reaching over him and wandering south towards her still puffy mound. She sighed as they made contact, clumsily rubbing either cleft. She looked back over at Milo. That bulge was looking more juicy than ever. Was she really touching herself like this in front of him?

“Milo?"

“Yeah."

He was trying not to watch as she played with herself.

“Can we do a second round?"

Milo sat up in a hurry.

“Uh, sure."

“I… mmm, want you in me~"

Milo was practically sweating. She was only getting braver as this went on. Holding his hand completely trapped under her forelimbs against her belly, masturbating right next to him… Asking him to put it in. He hesitated.

“You sure?"

Even Lucario, who was quite a bit bigger than Vaporeon, usually had trouble taking Milo all the way. He got up, slipping his hand out of her trap and moving to take off his pants. Giving the thirsty 'mon a great view of his bulge.

“YES. P-Please. Even if I can't take the whole thing."

Milo couldn't believe the difference between Vaporeon now, and just a few hours ago. It was staggering. Though as much as she'd changed today, he could tell she was still just the same little Eevee as before. Only she was now in a bigger, hornier body. She still had that shy tinge to her voice, and still moved in the same timid ways she always had. Even if it was all far more lewd. Milo undressed the rest of the way, getting off his khakis and underwear. Vaporeon's eyes locked to the shaft that came bobbing out. She'd seen it before, accidentally walking in on things or… watching… But now it would be hers. And even though it wasn't nearly as monstrous compared to her when she'd been an Eevee, his size still made her nervous. Milo got into position by her rear, straddling her tail between his legs as he crouched down on his knees. Vaporeon's heart fluttered as his shaft came to rest just above her crotch.

“You ready?"

Milo squeezed the bottle of lube he'd grabbed before getting up, and tossed it back towards his backpack after emptying a large glob into his palm.

“I-I am~"

With a few swift jerks, he had himself all slicked up while Vaporeon was… Well, she'd made plenty of her own. Milo leaned over her proper, his hands falling on either side of her head. She gasped as his length fell on her cooch, and her paws shot up to Milo's chest. Placing them on him as if to stop him dropping any further. Vaporeon looked down her front to see his massive erection sitting atop her squishy mound. Milo rolled his hips, grinding against her entrance and giving her a taste of what was to come.

“Ah~!"

She threw her head back as he raked over her clit. Even just its weight on her box was enough to make her clench.

“I'm going in slow."

Vaporeon quickly got her head back up.

“O-Okay…"

He drew back, again making her shiver as his stiff member teased her sensitive muff. Her breathing picked up as his head reached the opening of her slit, the glands sinking in and partially spreading her vulva. Milo paused, giving her a second to admire the view before pushing forwards. Vaporeon cried out as he easily slipped inside. Holy FUCK! So big!!!<3 She felt herself stretch over him, tightly wrapped around his shaft as he plunged deeper and deeper. Oh god! I can't-! He was already so far inside, but he didn't stop. No matter how much she tried to clamp down on him, she couldn't get a grip. Because of not only the lube but also her own leakage, more just kept forcing its way in. Vaporeon's body barely able to put up any resistance as inch after fat inch was fed into her. She trembled, her body felt like it was going to give out on her. It was too much! She panicked, afraid that this enormous swell of pleasure was somehow bad.

“M-Milo! God, Milo!"

He stopped, and she managed to pull herself together enough to peek. He was already two thirds of the way in.

“Holy shit Fluff Ball…"

He was HUGE. Every pulse, every throb pounded through her like a shockwave. Jolting pleasure to every corner of her body. She could feel so much of him… Veins and ridges tickled her taut insides, rippling over tender muscles and sensitive walls with every tiny movement. She tensed up, clenching around the hard cock inside her. SO. FUCKING. DEEP. Had he really not bottomed out?

“I'm- nngg! So much…"

She felt so tight, not to mention wet and warm. Her channel gripped him so urgently as he went, desperately rippling around his length. And yet he still couldn't find her bottom. Her stomach was visibly bulged, the shape of his member clear in her middle. Milo was so far into her that he found it hard to believe she could take more. And yet when he pushed forwards again he was met with little more resistance than before, her walls clamping down on him and writhing as the friction between them resurged. Vaporeon moaned out loud. How am I taking him!? She shouldn't have been able to and yet here she was, getting stuffed with eleven inches of the thick, human virility. Her breath caught in her throat as the last of Milo's length sank inside. She locked up as his crotch met her own, colliding in a soft squelch with his tip just coming to rest against her cervix. His balls touching down on the base of her tail. Vaporeon's whole body trembled. She couldn't believe the whole thing was in. Milo's entire length on her first try. There was some gratification to be had there, especially considering the other girls usually had trouble taking him all the way. Now only if only she could stop shaking from the sheer amount of pleasure washing over her. And her belly… She could see his erection outlined against it. It felt insane. To have his hips against hers, to be able to feel every little one of Milo's throbs, to be so full of her trainer that it showed through her stomach. Milo leaned in close, her forelegs useless as the heat of his body washed over her. He grunted as he pulled himself back a few inches. Even just being that little bit empty was unbearable. But Milo didn't make Vaporeon wait, firmly shoving back in to make her wail in pleasure. He held for another second. She felt so good, soaked to the point where not even her walls could get a grip on his shaft. All she could do was tighten around him and hope the warm, squishy confines were tempting enough to keep him there. But his body demanded he thrust. And so he brought his hips back again.

Vaporeon came. Even just these first few thrust had been too much for her. She writhed under him, her insides tightening up all around him while her limbs jerked around on their own. Vaporeon's tail thrashed between his legs, the heavy thing uncontrollable in her state. Milo slowed up for her, turning his pace down to crawl. Her orgasm felt amazing. To be able to squeeze and squeeze with all her might and not get him to budge an inch was intoxicating, and the fact he kept himself moving drove her wild. His texture sliding along her insides made the whole thing so much more intense. And her squirting… It was so much more than she'd ever cum as an Eevee. She not only drenched herself, but Milo too. Making that lube from earlier all but irrelevant. Milo tried to keep moving, but also wanted to stay as deep as he could. To draw out her orgasm as long as possible, and get himself closer to his own. Vaporeon moaned deliriously all the while, unable to control herself in the slightest as Milo tenderly fucked her through her biggest climax yet. She could barely register as Milo came further down on her, his chest against her once again. But even as she came down from her orgasmic high, it's haze still remained. She couldn't think straight as Milo picked up his pace again. Her mind felt like it was melting. Auto pilot kicked in, and seeing Milo's face so close she leaned for another kiss. Milo wasn't one to turn her down. Her whole body felt so hot, and Milo was just so relentless. His pace might have been slow but it was firm. Nothing she did seemed to slow him down even a little, her sopping insides all but a self lubing fleshlight for him to use. And she was loving it. So drunk on all these wonderful feelings that nothing else seemed to matter. Pleasure, delight, desire… love~ This tenderness, this affection. It was something he shared with all the other girls, something she'd wanted for a long time. His crotch met hers for another strong thrust, Vaporeon groaning as his head spread her deepest parts. It was hard to know if she was close again, or if she'd just been cumming this whole time. It was impossible for her to tell the difference anymore. The kiss had also turned sloppy, neither one really having the focus to keep their lips properly pressed together. And so it had devolved into a lot of frenching, with the two going deep whenever one or both realized they'd drifted apart.

But Milo was close. Her vice-like tightness had broken him down, and her sauna-like heat had dug its way into his core. He was ready to go out with a bang. Milo pressed his mouth against hers, laying firmly into her to bury himself as deeply as he could. Vaporeon gasped into his mouth, before moaning loudly down his throat. She shuddered as he pressed right up to the entrance of her womb, and it quickly became very clear for her that she was about to cum as well. Milo groaned as the first of his load came out, pouring into Vaporeon. She came with him, the sudden increase in stiffness followed by a massive gush of warmth more than enough to set her off. Milo grimaced as her insides locked up around him, only fueling his orgasm further. He unloaded into her, most of each wad forced into her womb by the sheer tightness Vaporeon was holding onto him with. Very little able to make its way out of the seal between her taut folds and his swollen base. And while her body had been so active before, Vaporeon now could only tense up with each mind-numbing contraction. Nothing worked, her muscles fighting each other at every turn. But none of that really mattered to her. Her brain was so flooded with sexual sensations that the rest of her body was an afterthought. She felt everything. Every vein, every ridge, every heartbeat. It was impossible not to. But by far the most intense was the pressure of her swelling middle, the bulging belly pushing up against Milo as he pumped her incredibly full. She could even feel Milo's balls resting at the base of her tail, clenching in time with each of his forceful thrusts into her already hilted muff. Her paws danced over her stomach as it expanded outward, her mind lost in a storm of ecstasy. As Milo kept going, she only got more wet. She was soaking down his legs, some squirts even managing to get above his crotch while she slicked her whole lower half. Vaporeon felt so warm. All Milo had to offer was pooling up inside her, driving her wild while his weight pressed down on her from above and that fat slab kept her astonishingly well plugged~ Her body was starting to feel all tingly again. The two grunted and groaned into their kiss, bucking and squeezing their way through their climaxes. Milo's throbbing slowly became less incessant, petering out as his ropes steadily diminished in volume. Vaporeon gurgled as the last of it got packed into her, giving the blissed out Vee a rather pregnant look. She felt so overwhelmingly full. Her skin felt like it was boiling. Vaporeon couldn't even get her eyes to focus. Everything felt too good. Wait she… gurgled? Milo opened his eyes to see a very shimmery looking Vaporeon roll her eyes back. She felt like her body was falling apart. Her paws melded into her stomach and her mouth filled the rest of the way with water. Oh god, am I actually melting!? Right in front of him, Vaporeon collapsed into a mostly light blue puddle. Milo jumped back, his softening shaft now exposed to air.

“Fluff Ball!?"

Vaporeon could barely think like this. It was like every nerve was totally exposed, and any bit of sensation would fire all of them at once. She was so much more sensitive, even just feeling the sleeping bag below her clouded her thoughts. But she could hear Milo shout, and knew she had to let him know she was alright.

“I-I'm fine!"

Her voice came out garbled, but intelligible. Milo calmed as he saw her face start to form back, and the puddle begin to collect itself.

“You're alright?"

Vaporeon shivered, sending ripples down her still gooey form.

“Y-yeah. Just… still really sensitive."

Milo reached forwards, his fingers sinking into her and coaxing out a moan.

“Mmm~!"

But she pulled away, still slowly rebuilding herself.

“S-stop! You'll get me all worked up again."

“Sorry! Just want to know what you felt like."

She gave him her best bedroom eyes.

“I'm sure you'll get- nn, plenty of opportunities to feel me out like this~"

She still didn't totally have it down yet, but Milo loved to see her trying.

“Well, regardless I think you're gonna need a new nickname. Something tells me 'Fluff Ball' isn't quite appropriate anymore."

Vaporeon nearly had her form back, still solidifying herself around the edges.

“I'm sure we'll come up with one."

“Hey, are you a lighter blue than you were before?"

The question caught her off guard. Vaporeon looked down at herself. She was.

“I also don't-"

As she put her paw over her now flat belly, she realized. All of Milo's spunk had not simply disappeared. She felt her cheeks go warm and a wave of embarrassment washed over her as she looked back up at Milo. Based on his face, he'd clearly realized the exact same thing she had.

“You just-"

“Please don't tell anyone."