The moment Cheeky heard the 'ding-dong!' of her doorbell, she leapt from her chair and abandoned the chemistry book on her desk to go hurry downstairs to meet her guest. The rabbit-mouse's ears bounced and waved over her head as she rushed down the staircase, and she paused only to brush her dark red hair out of her eyes before grabbing the door handle.

She knew who it was before she opened the door: Jake, a coyote who was in her chemistry class. Like her, she hadn't dressed down after class, and he was wearing a button-up shirt and black pants, as appropriate to the college's dress code as Cheeky's button-up blouse and skirt. His hair was red on the left side and black on the right, with pink fur and a gray underside. The big pair of glasses resting on his muzzle completed the nerdy look, to say nothing of the shy little wave he gave her; he had been quite surprised when she had asked him to come study with her.

"H-Hi, Cheeky," Jake greeted her.

"Jake!" Cheeky replied enthusiastically, reaching out and grabbing his wrist to tug him into her house before he said anything else. "Come on in! Make yourself comfortable." Jake stumbled a little and put a hand on the wall to steady himself as Cheeky closed and locked the door behind him. "How about I get you something to drink before we get started? I've got some iced tea, like, the REAL good stuff."

"Oh, uhm, sure, that would be nice," Jake replied bashfully, taking off his shoes and leaving them by the door.

"Great! Head on upstairs, my room's the first one on the left," she told him as she slipped off to the kitchen. Taking out a pair of big glasses, she took the jug of iced tea from the fridge and filled them up with it, her ears perked up to listen out as she did. Sure enough, she heard Jake going up the stairs, and a grin crossed her face.

Crouching down, she opened one of the lower cabinets and fished around for where she had stashed her special purchase, pulling out a white plastic bottle. While the bottle itself was unremarkable, the label was not: 'MAN UP!' the label declared, with such bold promises as up to 600% growth, a threefold increase in sex drive, and so on. The label didn't quite go as far as a visual demonstration, but the creative use of two eggplants with an arrow pointing between them to the much larger one made the message clear enough.

With a furtive glance out the kitchen door just to be on the safe side, Cheeky opened a drawer and pulled out a spoon, unscrewing the lid to reveal a pinkish crystalline powder. She took a glance at the directions, but got as far as 'mix to desired increase in size' and immediately got lost in thought, tapping one foot on the floor. She couldn't very well check how big Jake was in advance. Not to mention, she'd never seen Jake with any other girls and a nerd like him, while cute, couldn't possibly be packing much. That was why she'd ordered this special little supplement, after all, just to make sure he'd be big enough to satisfy her.

After a moment of thought she swapped the teaspoon she was holding for a tablespoon. Better to err on the side of caution. He'd thank her later. Plunging the spoon into the powder, she dumped a heaped tablespoon into one of the glasses of iced tea and gave it a good stir until all of the powder had dissolved. The color was only slightly different, not really enough to be noticeable, and she tossed the spoon in the sink for later before stashing the bottle back in the cabinet.

Jake was standing by her desk glancing through the chemistry book when she returned to her room, and she held out the spiked glass of iced tea to him. "Oh, thank you," he said gratefully as he took it, "Was there something specific you wanted to study...?"

Cheeky withheld her inner thought that she really wanted to study anatomy more than chemistry – his anatomy, to be specific – and gave him a smile. "Yeah, I didn't really get the, uh," her eyes glanced down at the open book for a moment, "oxidation reaction stuff we did recently. Can you help me with that? I know we've got a test coming up."

"Yeah, sure," he replied, raising his glass. Cheeky watched closely, sipping from her own glass to cover her reaction as she watched him drink. He swallowed, then paused, and she froze: what if the taste was too different? "Wow, this is really good," he said, and she relaxed. "You'll have to teach me this recipe some time."

"Sorry, the secret ingredient is, well, a secret," she replied playfully, giving him a smirk. "Anyway, shall we?"

--------------------

Jake wasn't sure if he was a good teacher or Cheeky was a good student, but she seemed to pick up on the material pretty well. It helped keep his focus off of her – he'd never had a girlfriend before and being alone with Cheeky in her room, even just to study chemistry, was a new experience.

Yet even despite his best efforts to stay focused, he began to feel hot, and shifted about in his seat, trying to ignore the fact that his cock was stiffening up. Jake bit his lip nervously; thinking 'not now!' to himself. Cheeky was being nice and he didn't want to come across as some kind of a-

"Jake?" Cheeky said, snapping him back into the present.

"Oh, uh, I was just thinking, sorry," he tried to recover, shifting forward so that his legs were under the desk fully and she wouldn't be able to notice the bulge between his legs. He felt hot all over, and reached for the glass of iced tea, but he had already drunk the whole thing. So instead he turned his attention to the book, hoping he could finish up before things got too embarrassing. "Where were we...?"

Fortunately she just smiled and pointed to part of the page they were on, and he nodded. "Ah, right. So, when these two compounds mix..."

As he kept going, he shifted about as subtly as he could in his seat. It wasn't as if he could reach down and adjust his dick with her right next to him, after all. He wanted it to go down one of his pant legs, but unfortunately it was going in a different direction – up. Taking a breath, he tried to keep his voice even, feeling his cock still growing and swelling, straining at his underwear until it slipped out past the waistband, threatening to do the same with his pants.

And that wasn't the only thing growing. This was more than just an embarrassing erection at a bad time; his balls were getting bigger too, starting to stretch and strain at his briefs. He couldn't exactly admit it, though! So instead he leaned forward and tried to ignore it, even as his cock swelled up past his pants and underneath his shirt.

"...er, so... do you think you can do this exercise on your own?" Jake asked, tapping the page, hoping it would give him a break.

"Maybe, but I'd like you to check as I go," Cheeky replied. "First, I think I have to..."

But Jake was already not paying attention, taking deep breaths through his nose. His cock was already at the bottom of his ribs and still going. Was this normal? He thought Cheeky was attractive, sure, but he'd never heard of anything like this happening to other guys! And his balls kept swelling too, already the size of mangos and straining at his briefs...

"...right?" Cheeky asked, looking over at him.

"Uh... right," Jake answered, hoping she had in fact been right.

She gave him an odd look, tilting her head and swiveling her long ears a bit. "Do you hear that?"

"Hear... what?"

"Sounds like..." she went quiet, and he listened out too. There was an obvious gurgling and liquid sloshing sound coming from nearby. He wondered if it was the pipes, but then realized that the noise was coming from him, and swallowed nervously. "...sloshing?"

"I, uh, I gotta go," Jake stammered, pushing back his chair and standing up. Maybe he could fake sickness until he figured out what was going on. But the moment he got up, he realized his mistake: the immense bulges in his pants and shirt were now extremely visible, and Cheeky stared directly at them. He made a half-hearted attempt to cover up with his arms, but the damage was already done.

"Holy shit, you're HUGE!" Cheeky exclaimed. She didn't seem to be upset, just surprised, but it was still incredibly embarrassing.

"It's not normally like this...!" Jake groaned, feeling his junk straining against his clothing. It was still getting bigger!

"Uhhh... yeah, I, uh..." Cheeky began, poking her fingers together with a sheepish grin. "I miiiiiiiiiiiight have, you know... slipped a little something into your drink...?"

He blinked at her in surprise. "Wh-what?"

"Just to have some fun, you know!" she explained. "Um, wait right here, I'll go get the bottle and see if there's any way to reverse this."

She got up and ran off, leaving Jake alone. He groaned and staggered over to the bed, unsure what to do. At least he knew why, but when was it going to stop? He didn't want to take his clothes off without permission, but they were getting so tight...!

The choice was soon taken away from him: he heard the stitches starting to pop on his clothing, and just as he was reaching for his zipper, his pants gave way, torn open from within by the enormous, bowling-ball sized testicles that spilled forth. His briefs had been holding together better, but with their contents now freed, his underwear also ripped open as the orbs within bounced freely. The zipper on his pants burst and the single button at the waist stood no chance of holding back, popping off and bouncing off the far wall.

His cock, over a foot and a half long by now, throbbed hard against its confines, and with his pants no longer holding it at the base, it strained against his shirt and easily broke free. The buttons of his shirt each went flying all over the floor in front of him, and he groaned out as his cock tore free and bobbed in front of him, a gray spire of flesh as thick as a soda bottle with a fat glans at the tip. The waistband on his already tattered underwear snapped, and without either his underwear or pants pressing on his urethra, precum began to spill from the end of his cock readily, leaking down its underside.

Jake stared in shock, unable to move until Cheeky came back with a white plastic bottle in one hand, her other hand scratching at the back of her head. "Soooooo, I miiiiiiiight have given you triple the recommended dosage..." she began in an apologetic tone, but the moment she saw his cock and balls and the story his ripped clothing told, she stared in awe and trailed off.

"How do I turn it back?" Jake groaned, but it occurred to him that even if he did shrink it down, his clothes were ruined now.

"Um, well, it doesn't say anything about that," Cheeky told him with a glance at the bottle. But then as she looked back at him, she chucked the bottle over her shoulder and drew closer to him. "But that's fine, I have an idea!"

"What id-?" Jake began, but Cheeky wasted no time in reaching out and grabbing his shaft with both hands just under the head. She leaned in and planted a big, wet kiss on the tip, making him groan out loudly in both surprise and pleasure, then opened her mouth as wide as she could. Jake's hands gripped at the bedcovers as she tried to stuff his fat glans into her maw, suckling on his tip, her tongue lapping over the pre-leaking slit on his glans.

She groaned into his cockhead, determined and lustful, gulping down the plentiful precum leaking from the tip, and Jake moaned out in turn from the warmth of her mouth around his glans – or the front half of it, at least. Despite her greed, even with her mouth open as far as it would go, Jake's newly-swollen engorged tip was too big for her to be able to get the crown into her maw, and she reluctantly pulled back after one last lick over his sensitive flesh.

"Okay, okay," she thought aloud, both hands stroking up and down Jake's shaft. "If it's too big to fit in my mouth... maybe it's big enough for something else?"

"Like wh-?" Jake began, but once again he was interrupted as Cheeky brought her right hand up to his cockhead and pushed her fingers against the slit on the tip. He cried out in pleasure as her first two fingers managed to dip inside of his urethra, teasing at the smooth and incredibly sensitive walls within, his hands clenching at the bedcovers. "Ahh, Cheeky...!"

"Yeah, this is working way better," she mused, licking a stray bit of precum off her lip as she slipped her other fingers in too. She wiggled her fingers inside of him, teasing at the inner walls, causing a surge of pre to splurt out around her hand and onto her wrist. "I wonder how deep I can get?" she asked rhetorically, tucking her thumb in with her fingers and easing it in as well. Watching intently, she began pushing her hand downward further, and managed to sink it in to the wrist, making Jake squirm and moan out on the bed as she did.

Surprised at his apparent stretchiness, she smirked and balled her hand up into a fist before pushing it down further. She could see the bulge in the bottom of his cock her arm was making as she pushed deeper into him, and felt the pressure growing against her arm: some of his pre was spurting out around her arm, and she kept a firm hold on his shaft with her left hand to steady it. Jake flopped back onto the bed and continued to moan, his balls hanging heavily between his legs over the edge of the bed and churning audibly as more and more preseed oozed around Cheeky's arm.

Lifting her arm back up, she pushed it down again, watching Jake closely, yet it was only pleasure she saw on his face. His eyes were screwed shut and his breaths came quickly, his shuddering moans accompanied by wriggles of his body. She pumped her arm deeper into him, managing to reach the elbow, causing a thicker splurt of precum to erupt around her arm and splatter onto the floor.

She pulled her arm out with a wet sucking sound, her fist emerging with an audible pop, her entire arm covered in mostly-clear slick fluid. "Okay, big guy," she teased as she climbed up onto him, "I'm taking you for a ride."

Grabbing his dick with her slicked right hand, she reached under her skirt with her left hand and tugged her panties aside, not bothering to undress herself at all. Lining his cock up with her pussy, already wet after playing with him, she ground down against him and wiggled her hips. She couldn't fit him into her jaws, but maybe, just maybe...

Her slit spread wide as she eased his cockhead into herself, and she groaned out along with him, his thick shaft making for a tight fit. Yet she was able to spread wide enough for his whole glans to enter her vaginal tunnels, making her shudder atop him. "There we go...!" she groaned out as she sank her hips down until his cock bumped against her cervix, filling her loins with warmth.

That wasn't going to stop her, though. Not even half of his cock was inside of her! She began to ride him and ground her hips down hard each time, pressing his leaking tip against that inner barrier. Reaching out with both hands, she put them on Jake's shoulders and held him down against the bed as she bounced, both of them moaning out together, Cheeky's wet walls leaking enough juices that they ran down his cock all the way to his crotch.

Eventually Cheeky was able to get Jake's cock through her cervix and into her womb properly, and she went cross-eyed as she felt it filling her up, sinking her hips down. Inch after inch of the coyote's meat was engulfed by her wet pussylips, and she didn't stop until she was fully hilted on him, her hips meeting his. She felt so incredibly full – and no wonder; as she looked down she saw the enormous bulge in her belly his cock was making, stretching out her shirt. Panting, she reached out and rubbed the bulge with one hand, then grinned hungrily. Now she could really go all-out.

Gripping his shoulders again, Cheeky began bouncing her hips and fucking Jake hard, never going more than halfway up his shaft as she jackhammered her hips down against him with the kind of vigorous pace only someone part-rabbit could muster. Jake shuddered and wordlessly moaned out underneath her as she rode his enormous cock at a blinding pace, his hands clutching the bedcovers.

"Fuck yes!" Cheeky all but shouted, savoring every downward movement of her hips and the accompanying feeling of his cock plowing so deep into her that her belly stretched out just to accommodate this entire length and girth. The precum leaking into her felt wonderfully warm, and every throb of his shaft against her walls only intensified the lust burning within her.

He moaned out something, trying to call her name, but she kept going at her rapid pace, her hips a blur as she fucked him as fast as she could. He suddenly yelled out and bucked his hips upwards, driving his cock as deep as he could into her pussy, and then she felt him start to unload.

It was like a garden hose – no, almost more like a fire hydrant bursting. She felt the eruption of cum within her depths and she hilted on him one last time, quivering in pleasure of her own. His balls pulled up as the huge gout of cum blasted into her, swelling out her belly to contain it all, and she gave a satisfied sigh; it was a good-sized load-

But he was still moaning, and she felt his cock swell again as another blast of cum surged through it. He wasn't done. He was only beginning.

Thick rope after rope of cum blew into her depths and stretched out her belly even further, making her shudder and moan out louder. She could hear the churning of his balls and the sloshing of cum inside her, not to mention the feeling of warmth within her and the stretching of her belly as her womb was filled up and the pressure in it bloated it out. Her belly strained at her shirt, and before she could even think to undo the buttons, they were already flying off and bouncing off the wall beside the bed. Her shirt flew open and her belly rolled out, sloshing loudly from all the jizz inside, wobbling on top of the squirming and writhing wolf below her who could do nothing but moan from orgasmic pleasure.

Another heavy eruption of cum inside of her was enough to push Cheeky over the edge, and she almost screamed out in ecstasy as her climax hit, gushing her nectar onto Jake's lap. "Fuck, fuuuuuuuck!" was all she could cry out as his orgasm just kept going, swelling her more, shuddering atop his body.

Eventually he finally stopped cumming, and Cheeky would have collapsed on top of him if not for the gigantic belly between him and her. She was enormous! Panting, she rubbed her hands over her bloated, cum-filled belly, feeling the heat and warmth inside. Jake was sprawled out, just trying to recover, panting and gasping for breath.

It didn't seem like he'd gotten any smaller, but that was okay. Cheeky smiled a little to herself and looked down at him; he was definitely a keeper.
