"You look a little different today, Chrissy, did you do something new with your hair?" Bio asked. He looked the redhead up and down. There was certainly nothing wrong with how Chrissy looked. But he tilted his head as he puzzled out why she seemed different on his visit today. "Oh, that must be it. Your breasts are smaller than normal," he figured as he snapped his fingers. Chrissy rolled her eyes.

"Um, I feel like I should be offended by you calling my breasts small in any setting," she replied as she pushed up her glasses. She showed off a healthy amount of creamy cleavage on most occasions and today was no different. There was enough flesh on display that most women would have had to go topless to show off as much. "My breasts are as lovely as ever, thank you." She even pushed them up with her left arm to prove her point. 

"That's strange then," Bio said. His tone slipped into something that made it more obvious he was goofing around. "Why do I remember them being several times bigger than your head? Like I have this image of a row of blue ribbon-winning pumpkins and watermelons, and then your boobs are last in the row, and each one is bigger than anything else there?" He snickered. "Just, these huge, bouncing jugs!" Chrissy giggled and leaned forward, showing off her breasts a bit more.

"Gosh, these aren't enough for you?" she teased. "I've seen your desktop background, Bio. As much as you love when we're transformed into cowgirls and bimbos and huge, boobalicious blobs, your wallpaper is just a normal picture of your friends?" She raised an eyebrow. "You're such a degenerate! I see what's happened. Clearly your mind has been warped and you think I always have breasts a few times bigger than my head." 

"Not that I wouldn't mind being that huge," she reasoned. "There's enough automation in my lab that I could still get most of my work done. You know just as well as I do that huge boobs are magnitudes more fun than regular boobs."

"Oh, then why don't you just make your bust size that massive and permanent?" Bio asked. 

"Well it's the strangest thing," Chrissy said as she once again rolled her eyes. "Whenever my boobs get bigger, it always seems to be accompanied by my brain getting gunked up with bimbo goo or being turned into a constantly-lactating bovine. Sometimes both!"

"...Right. I ask again. Why don't you just let that happen and make it permanent?" Chrissy giggled.

"Because then I wouldn't have time to make everyone else bigger and hornier as well!" 

"Ah that's fair, that's fair." He sat down at a chair opposite of Chrissy and eyed up her short skirt. The urge to make a crack about her butt not being as big as he expected came to his mind. But Chrissy beat him to the punch when she saw where his gaze lingered.

"Oh don't even think about cracking a joke about my rump, Mister Bio-Booty. Your butt tends to get so fat it defies logic. I swear sometimes I could give you a formula that is only designed to make your breasts a few cup sizes bigger, and your ass would still grow anyway." Bio nodded his head in agreement.

"Yeah, you know. I really should figure out what's up with that," he said. "But on the other hand I do love turning into a girl and getting my butt pinned down by its own weight, until I'm a squirming, horny mess that can't properly shake my ass."

"Hehe, a huge booty bimbo with so much junk in the trunk she doesn't know what to do?" Chrissy inquired.

"Just a ridonkulous ghetto booty so phat that it couldn't be contained by a closet full of skirts."

"So heavy and thick that you couldn't even properly shake it, quake it, wiggle it, jiggle it!"

"A nonstep bounce-fest as my brain fizzles out to the repeated claps of my ass cheeks!"

"A backside so big that you can't even spank yourself, and you desperately want to be spanked!"

"A vulnerable, pliable mass of booty that begs for spanks, kisses, and all sorts of things jammed up inside of me!" Bio and Chrissy were both somewhat red-faced and panting after their hypothetical escalation. To the point that both scientists had leaned out of their chairs, and were only inches apart from one another. Their lips were only an inch or two away from touching. Bio broke first as Chrissy winked and pursed her lips at him. His blush intensified and he sat back down to scratch at his cheek. 

"Hehe. I guess I won sexy chicken," Chrissy commented. She pulled up a page on her computer and looked at some progress results. "So, what have you been working on lately? Anything good?" 

"I don't really think I've had anything new in the works lately. I've been trying to do some spring cleaning and efficiency testing. Some of my stuff was too big and can be scaled down."

"Haha, it's hard to think of something in your lab being too big. But I guess if it means less space for boobs and butts, it could stand to be shrunken down."

"Yeah, exactly. Some stuff can't be diminished. Like pumps and tentacle-hoses have to stay thick as ever otherwise Lessien would complain, and milk tanks can't really be shrunken down. But some of the more tech stuff can be made smaller. Or even more portable. Actually, heh, I've been trying to improve on some other designs to make them smaller too." He reached into one of his pockets and grabbed a device.

"You know, you joked about my boobs not being huge but it is genuinely weird seeing you looking like a normal guy instead of a mad scientist."

"Ha, well sometimes I don't want to wear the cloak," he explained. He couldn't do much about the cybernetics, but he admitted it was odd coming over to visit in more comfortable clothing. "Ah, here it is." Bio extracted a device that barely fit in the palm of his hand. It was around the size of a computer mouse, just rounded on all sides so there were no flat edges. 

"Ooh, what's that do?" Chrissy said. She scooched her chair forward. She wasn't dumb. She knew that once Bio pulled it out, there was a significant chance it was going to be used on her. But curiosity was a hard enemy to fight against. "A bimbo laser? A milk-bomb? Maybe one of those controllers for hypno-mind control-chips?" she offered.

"Nope. Actually, I don't know what this one is called," Bio replied. "It's actually a portable version of one of your machines that Nami told me about." Chrissy raised an eyebrow.

"It is? Huh. I don't really recognize it, even so. What is it meant for?" she asked. Bio rolled the device in his hand and clicked a button so that a blue light appeared on the end of it, flashing on and off. Chrissy looked at it for a moment and her eyes widened.

"Wait. Bio that's not… Bio, that is a dangerous piece of technology! Heck, I don't even know if I could explain how I built it, but I've done my best not to mess with it!"

"Oh, it's fine, Chrissy. You worry too much." Chrissy blinked as a faint fog lingered in her brain. Maybe she did worry too much and should relax a little? She shook her head, which caused her red hair to flail about behind her.

"No! Bio, I'm serious. That's powerful stuff. You have to be super careful with it. Otherwise you could say something like my tits are bulging out of my top and oh darn it!" She clasped her hands over her mouth but it was too late. Her breasts visibly swelled in her once-loose-fitting shirt. She already had a nice amount of her d-cups exposed, but soon they pressed into her shirt tightly enough to show even more. The flesh looked extra soft as her bosom expanded a few cup sizes. Though the shirt held on, causing her rack to bulge out of the top like muffins rising in the oven.

"See what I mean?" she exclaimed. "That device makes you less inhibited and more likely to say stuff."

"Like how your lips look extra plump and pouty today?"

"Nngh, no they don't!" Chrissy exclaimed. But even halfway through her rebuttal she felt her lips get pushed forward as they thickened to be as thick as her pinky finger. Her cheeks even pushed in some as well, to force her lips into a slight pout. It looked like she was angling up for a kiss. "Biooo, it is very trigger-happy! All it takes is me mentioning something like how my fat butt barely fits in this chair and oooh…" She clasped the sides of her chair as an all-too-familiar sensation went down her backside.

Bio merely observed as she squirmed in place while her butt expanded. The skirt she wore which normally rested a few inches above her knees was pulled up further. Her hips puffed out as the edges of the chair looked closer and closer to wedging her in place. All the while, Chrissy's body was pushed up by an expanding bum that was filled with soft fat. Bio murmured to himself appreciatively as Chrissy's face turned pink.

"Yeah, your butt looks great," Bio commented. "It probably feels super sensitive too."

"Kya!" Chrissy twitched as the sensitivity of her butt suddenly shot up. 

"Such a soft, yielding butt. Just desperate for somebody to play with it." Chrissy groaned and tried to resist, even as she turned around in her chair to point her skirt-clad rear in Bio's direction. Her knees pressed into the cushion as Bio continued. "I bet underneath that skirt is a skimpy, lacy thong." There wasn't before but soon there was. The modest comfort it gave Chrissy didn't alleviate her distress. 

"It feels nicer now," Chrissy admitted. She bit on her lip as she fought to move her butt away from Bio. "Bio don't! If you spank my fat, jiggly butt I'm just going to keep begging for it like the naughty butt-slut I am!" He graciously allowed her to finish speaking before pulling back his hand and smacking her butt. Her brain felt a surge of electricity jolt through it as she moaned in pleasure and immediately begged for more.

"Oooh, more, again!" Bio smacked her cheeks again. The next time he pulled her skirt up to get a better look at her wobbling booty, and its slightly-reddening skin. There was a dark purple thong lodged firmly between her butt cheeks.

"Damn, Chrissy. This is a sexy fat ass. I swear it's getting fatter each time I spank it." Chrissy whined as Bio smacked it again. "I barely even need to tap this gigantic butt to make it wobble." His words became the truth. As his hand slapped her cheeks over and over, her butt expanded outward. The thong hid even less than it did before as her wide scoops of vanilla ice cream widened and grew outward. Each time he spanked the sluttifying scientist, Chrissy let out a moan of pleasure.

"Ha-ha-ha-ha!" She let out high-pitched breaths of bliss. Her voice sounded lighter from all the pleasure she felt as her brain sank deeper into a sticky mass of confusion and warped reality. When he slowed down for even a bit, Chrissy shook her hips up and down. Her butt was so wobbly that her cheeks smacked against one another several times to encourage her friend to continue. By the time he seemed content, Chrissy's butt would not have fit back in her chair. Each cheek was as big as a jug of water used in an office cooler.

"You know. With an ass this big, you shouldn't wear skirts, you should just stick to skin-tight booty shorts." Her skirt was pitiful at that point, only covering a fraction of her ass meat. It reshaped itself into a tight pair of purple shorts that clung to her cheeks. Even then it barely seemed like the garment was meant to fit her huge butt, as it exposed the entire bottom third of her monumental rump. Some adipose spilled out of the top as well.

"BUTT SLUT" was emblazoned with glitter over her rear, with plenty of room on her cheeks for the two short words. Bio nodded appreciatively and made one small addendum. 

"While still giving you a hip-heavy whale tail, of course." Chrissy spread her legs in the chair as her hips widened past her shoulders and her waist pinched in. That gave room for the strands of her violet thong to slip over her hips and stick in place. Chrissy pouted as she looked over her shoulder at Bio. With her boobs pressed into the back of her chair and her ass hovered over Bio's lap, she looked ready to give him a lapdance.

"Ugh I look like I'm a-mmph!" Chrissy pulled up a hand and managed to shut her mouth before she doomed herself into being a lapdance ho or something worse. Bio still had the reality-warping device in his left hand, while the right massaged her butt again. "Bio, please, just turn it off. I'm getting really horny and it's getting harder to think, ooh…" She embarrassingly moaned at the sensation of a few more brain cells getting subdued in the ever-growing stickiness of her head. "I just know that thing isn't good!"

"Chrissy I just don't know why you're concerned about this when you should be more concerned about your boobs." Chrissy shivered.

"My boobs?" She shook her head. "My boobs are fine!" Ha, there, she thought. She wasn't going to make the situation worse for herself. "They're a real set of milkers that no man can resist!" Bio was suddenly quite thirsty, and although he couldn't see the wet spots that appeared on Chrissy's shirt, he could smell it. "Uh-oh." Bio licked his lips and pulled Chrissy right onto his lap. Her bottom had been made so big that she spilled over his lap entirely. 

"Nnngh, Bio, your big cock is rubbing against my fat ass," Chrissy moaned as Bio turned her around. Seconds ago, Bio's dick was still contained in his pants. At her words it sprung free, with an extra inch or two of girth, and nestled in her billowing bum. He grasped her cheeks and pulled them apart to better wedge his erection between them. When he released the spheres they slapped back together around his boner and made it twitch. 

"You're making a lot of milk," Bio said, and Chrissy's production levels increased. Her nipples bulged into her shirt and it grew more drenched from her milk. He licked his lips hungrily and pulled her top up, so her nice set of breasts could flop out at him. They looked firm from how filled they were. Each one looked needy for release. Bio helped and pressed his lips into one of her nipples.

"Oooh, Bio, y-you perverted, mmnngh, hungry hung man~" Chrissy groaned. Bio suckled harder as his erection grew more prominent in her ass crack. The redhead's booty was still so immense that his dick wasn't yet big enough to poke through it. But he enjoyed everything all the same, as she began to bump her hips up and down to massage the length of Bio's dick. "Mmmnngh!" She held Bio's head closer out of reflex and he drank more.

"Mm, mmf, mmf," Bio's heart raced as he suckled. Chrissy's milk was decadent. He gulped down mouthful after mouthful, and occasionally gave playful nibbles to her bumpy areola. With as full and milky as she was, there was a lot to give out. The tension in her breast was quickly abated as the dairy ran down his throat in a soft, steady flow. His hands grabbed hold of her breasts. Compared to her butt, they were still small. Each was only as big as Chrissy's head.

"Nnngh, k-keep drinking," Chrissy moaned. "I'm, mmf, so full. I'm a freaking milk faaac-tooor-yyy!" The last word was drawn out as Bio kneaded her boobs in his greedy hands. They swelled out, with Chrissy's nipples becoming a more vibrant pink to look like cow teats. Bio needed both hands just to properly squeeze on breast. He did so, aiding the release of milk into his throat. It flowed down at the perfect temperature, somewhat satisfying his cravings.

"Mmf, fuck, Chrissy. You have more milk than one person can drink in these huge, lewd boobs of yours," he moaned. He already would have failed if he tried to drain Chrissy. Now the task was impossible. Her breasts bulged out again. Chrissy's right tit slapped into her torso, with the lowest curve hitting her belly button. Her areolae was as plump as a peach with a nipple that stuck out almost like a pill bottle. Milk beaded at the tip. Ink formed at the tops of her breasts, spelling out the words "VAPID DUMMY" on her rack.

"Nnnngh, s-staaahp," Chrissy whined as Bio went back to sucking the left breast, which was slightly less full. "Bio, nngh, I'm getting dumber the milkier I get! Ooh, see, mmf, I know I'm not supposed tah say dat!" she moaned, her brain sinking into a pool of pink and white. 

"Mmf, Chrissy," Bio said. He grabbed her other boob and pushed it up towards her lips. "Just drink. Put those nipple-sucking lips of yours to work like a good girl." Chrissy's heart throbbed with desire as her nipple looked even more succulent and desirable than it did moments ago. Her lips inflated to the width of her thumb and gained a sheen of pink around them. She licked her kissers, but otherwise didn't hesitate before she planted her mouth on her own nipple and began to feast. Her milk made her swoon. Chrissy's back arched as she suckled happily.

For a while it was relatively quiet. Bio and Chrissy drank from her decadent breasts, slowly draining her of her sweet treat. Chrissy's eyes looked down at the device Bio had brought. It lay on the computer desk next to their chairs. It's malicious blue light still blinked on and off. The original design was much larger, but had a limited radius. If she could just get away from it, she wouldn't be affected by words anymore. But it was so hard when her inhibitions were steadily lowered over and over. It was harder to fight the urge to say perverted things. Ironically having her mouth occupied was the safest thing she could have done. 

"Mmmm, mwah." Bio pulled his mouth free and looked at Chrissy sucking from her own tit. "Mm, Chrissy. You look so hot holding onto your own jugs with those sexy bimbo fingers of yours." Her fingers became even more slender than they were, while the manicured fingernails extended to be an inch long, pointy, and topped with pink nail polish. "It's really like you were made to get off to perversion." That was a reality before Bio even said anything, but now Chrissy's pussy gushed a bit harder when Bio spoke to her, or when she felt the orgasmic taste of her milk run down her throat.

"Mmnghgh, Mmmbo!" She tried to speak over her own nipple and Bio chuckled.

"Silly Chrissy. You know it's so hard to understand you with those fat cockscukers of yours," Bio said. The suction around her nip increased as her suckers grew to press against the tip of her nose without even trying. The pink grew more neon and they shined like they were constantly coated in saliva. Chrissy whined as the moisture around her crotch increased, drenching Bio's groin. He grabbed her breasts and pushed them together. She seemed unable to let go of her nipple, either from mental compulsion or her suction being too strong to stop.

"Mm, Chrissy really gets giddy when her body is played with, doesn't she?" Chrissy shook her head a few times, but started to nod when she realized how true it was. She heard a sound like several cans of soda were opened nearby. That was just her willpower fizzling out further. Bio extracted her nipple from her mouth and then ran his finger across her lips.

"Mmmgnh, Biooooo. Chrissy's godden all thick and squishy! Her body's wike, so pillowy and soft cuzza you. You better take cawuh of dis!" After that it was as if all the sliders on a character creation screen were pushed further to the right. Her lips were no longer able to get out of her field of view, and the bottom one actually brushed the bottom of her chin. "Mmmm. Biooo!" she whined as her voice grew ditzier and hornier. Her breasts, buttocks, and womanhood all plumped up yet again. The booty shorts still hung in there.

"Hmm? Sorry, I was just wondering why you even bother with shirts. You should just go topless and show off your body more." Chrissy gasped as her lab coat and shirt vanished. She arched her back in a larger degree than should be normal, making her breasts jut out further. "Your hair also looks a lot pinker in this light. It's super soft and cuddly." Then just like that, her red hair was tinted lighter and fluffed up like cotton candy. The ponytail she had on went from the small of her back to just below her butt cheeks, which hadn't released their grasp on Bio's cock since he placed it between them. 

"C-Chrissy's gedding woozy," the now-pink-haired woman said. Bio smirked and leaned back some.

"Are you? It must be from all those pink sparkles in your eyes." She blinked a few times. "Though it matches your glasses and lipstick." She blinked again, as her irises flipped from blue to pink. There even seemed to be hearts in each pupil. Chrissy's glasses swapped to a more bimbo-style as well. They didn't just turn pink, the frames became plastic and heart-shaped. Glitter became fused to the vibrant pink on her lips. "Gosh, you really are looking like a dumb, vapid, bimbolicious babe!"

"Nnngh!" Chrissy climaxed even when Bio stopped touching her. She swung her head in a circle and chuckled.

"Oooh… hehehe… well, dat's cuz, wike, Chrissi is a babe. A babe who, wike, is obsessed with cawk," she moaned. "Especially your big, fat, throbbin' meat!" Her lips were still enormous, but a bimbo seemed to have a better grasp on how to communicate with them. Bio groaned as his own erection surged to new life. Even with the additional inches Chrissi's butt had gained since he stopped spanking her, Bio grew big enough for his erection to finally break through the pudding-like walls of her rump.

"Hahh, mmf. Chrissi. I'm gonna fuck your butt now. You're gonna love it, aren't you?"

"Well, duh!" Chrissi agreed, as she began to bounce on top of Bio. "Chrissi's, um a bubblebutt swut who can take any size! Even Bio's, mmf, thick, throbbing diiiick. Hehehehe. It's like, so big it probabwy makes him wight-headed!" Bio had been prepared for a bigger dick as Chrissi lifted up her rear and slammed it down on his length. But he was not prepared for the sudden rush of adrenaline when his vision went blurry.

"Wh-Whoa," he moaned as the bouncing bimbo worked his length with her magnificent backside. "Hahh, mmf, k-kay," he said, slightly less intelligent than he'd been before. He giggled and smacked Chrissi's rear so it grew again. 

"Mmmf, Chrissi wuvs, wike, being fucked this hard," she moaned. She lifted up her legs and rested her ankles on Bio's shoulders as she bounced up and down on the biggest dick she'd ever seen. It was fantastic. Her body was literally made for it. There was no way it could have gone wrong. 


"Mmf, hah. I love nngh, seeing your cute feet in those stripper heels," he said. The tiny pink flip-flops Chrissi wore grew more secured to her feet as multiple straps came out to turn them into large, sexy heels. They would push her up five inches off of the ground if she could bear to stand on two feet. It would be hard when the urge to bend over and take it up the butt or suck from her nipples was so strong. 

"Mmngnh, haha, me too," Chrissi agreed. She held onto Bio's shoulders and squirmed. "Mmmf, harder. More. Fuck your bimbo!" she begged, somehow getting even faster. 

"Hah, my sexy bimbo with her, mmf, delicious body. I'm, nngh, gonna cum so hard. R-Right on that tramp stamp of yours!" he exclaimed. As he neared an orgasm an extravagant heart appeared right above her bum, and spread all the way to her thong straps. 

"Oooh, hah, d-do it! Cum so hard Chrissi goes gaga!" she yelled. Bio pumped again and again until he finally came. The pumps from Chrissi's body made his erection throb as load after load went right inside her butt. "Oof! Mmm… Bio battah," she moaned. Bio huffed and continued to release, until she leaned forward enough to extract herself from his penetration. The last load splattered on the small of her back just like he'd promised. 

"Woo," Bio gasped. He felt a bit exhausted. He leaned back in his chair, and it rolled somewhat backwards with Chrissi still on his lap. The purple-haired man reached for the device so he could shut it off, but fumbled. He pressed a few buttons on the keyboard before he was able to grab it. "Okay, now… how did Chrissi say to turn this off? Oh, I don't think that was in the schematic… uh…"

"I do love turning into a girl and getting my butt pinned down by its own weight-"

Bio turned his head quickly to the nearby monitor. That had been his voice. Even quicker he felt his body shifting. That throbbing, massive erection that still rested between Chrissi's butt cheeks began to shrink down. His lithe musculature began to vanish, his face softened, and like an entire bottle of hairspray had been suddenly undone, his hair went from upright to loose and free against his back. But more worryingly, his butt swelled so fast that tears formed in his pants.

"Until I'm a squirming, horny mess that can't properly shake my ass."

He now realized what had happened. Like any good scientist would set up, the whole lab was under constant recording. He'd accidentally started a playback of the conversation he'd had earlier. While his blood pressure raced, Bio felt the blood rush away from his cock since it was no longer needed. But arousal built up in him anyway, and without the ability to get a hard-on but lacking a pussy, Bio's body didn't know what to do. 

"Nnngh, ah, fuck," he muttered, bending forward into Chrissi's boobs. The bimbo was so clearly out of it that she didn't even respond to the puddle of drool that formed in her cleavage. "Okay, I can figure this out, I, nnngh, fuuuck." He could figure it out. But it was more a matter of whether he'd be able to do anything about it before the inevitable happened. His hips and buttocks widened faster and grew fatter. More tears appeared and he felt his cheeks get wedged into the computer chair.

"Hehe, a huge booty bimbo with so much junk in the trunk she doesn't know what to do?"

That was Chrissy's voice that time. But it still had the same effect as before. Bio felt his brain go foggy. He giggled, and his voice was much more feminine than he liked. His waist pinched in as a pair of breasts pushed out from his shirt. He couldn't stop the moans from breaking through, even as his dick finished shrinking away entirely. With a pop Bio was now even more susceptible to expansions and transformations than normal.

"Oooh, gosh," Bio moaned. She started to wiggle her bum back and forth even while wedged in the chair. She just couldn't help herself. "Oh gosh this is so pathetic and sexy," she muttered, only making her condition worse. No matter how much she shook her bum, she couldn't pull herself out of the chair. It struggled, and even with her pants ripping more, she couldn't get free.

"Just a ridonkulous ghetto booty so phat that it couldn't be contained by a closet full of skirts."

"Oooh!" Bio let out a much louder moan as one of the arms on the chair snapped off. That freed her, and Bio stood up as quickly as she could. She looked behind her and saw the utter shelf of ass she already carried. Each cheek was already as big as Chrissi's. The pink-haired bimbo was slumped between her own chair and the desk. The weight of her milky tits kept her from falling over entirely. Bio took a step, but then found herself bent over. Her hands went to her knees as she shook her butt up and down. Even though her cheeks were so huge and heavy that they nearly reached the back of her knees, Bio couldn't help but try.

"So heavy and thick that you couldn't even properly shake it, quake it, wiggle it, jiggle it!"

It became more true with every passing second. Bio's butt-wobbling was not very elegant. It wobbled around with the cheeks growing with each second and smacking against one another. She let out yelps of pleasure all the same. Her hands reached out and spanked herself after a while. It just became instinct and she couldn't fight against it. Bio groaned as she saw the device still sitting nearby. If she managed to waddle and twerk her way over to the desk, maybe she could just crush it between her ass cheeks? She tried to shuffle her feet over to the console, but it was tough going. Especially because the damned recording was still going.

"A nonstep bounce-fest as my brain fizzles out to the repeated claps of my ass cheeks!"

"Nnngh, no no no!" Bio moaned. She felt her brain made more malleable by the insidious machine. The cyborg's rump brushed against the floor, and she was still several feet away from the machine. "Hehehehe, oooh, my butt's getting so fat~" Her growth didn't need another boost, but it got one, and in seconds she was truly pinned to the floor. The sole of her feet still touched the ground, but she felt them being pushed up bit by bit. Bio didn't have long before she couldn't move at all.

"Mmf, come oonnn, come onnn, or Bio's gonna become a dumb beanbag toy with more butt than brains!" Bio's eyes fluttered as a small river of drool came out of her soft lips. "Hehehe… butt for brains…" Bio closed her eyes and tried to scoot. All she had was her tiptoes on the ground, and trying to move a body that was over 400 pounds, now mostly butt, was not possible at all. Soon her rump made sure her feet couldn't touch the ground.

"A backside so big that you can't even spank yourself, and you desperately want to be spanked!" 

Bio put that to the test immediately. Her butt craved spanks. It needed impacts of any sort. But she couldn't even lift her butt up to smack it into the ground now. Her expansion happened so fast and she was so huge. Her poor ass was left un-paddled. She reached her hands back to strike her own meaty spheres. It felt good, but not as good as if she were able to reach the furthest points. With each cheek as big as a beanbag chair she was sorely unable to satisfy her cravings.

"A vulnerable, pliable mass of booty that begs for spanks, kisses, and all sorts of things jammed up inside of me!

"Nnngh, hahhh, someone fuck Bio's butt!" she yelled. The craving grew stronger. It was already out of control. There was a teensy part of her that was at least glad that the game had ended after that line. She needed something, anything to play with her butt. "Mmmgh, hahh, come on, anything. Bio needs dicks or tentacles or, mmf, hoses? Anything!" She wiggled pitifully in place as her butt lifted her higher off of the ground. Even if she were next to the device now, she'd been lifted up so high that she couldn't reach it. She looked down and pouted.

"Mmmf, hahh, Bio's bum-bum is, guh. Hot. So hot, big, sensitive, mmf!" She knew she was making it worse. But it also just seemed to make things better. Until she heard something spark and fizzle. She looked down and past her wide, massive thighs, she saw milk spewing forth from Chrissi's fat nipples. It leaked into the console and made the screen flicker. "Huh?" The conversation Bio and Chrissy had afterwards suddenly stopped and jolted backwards.

"I do love turning into a girl and getting my butt pinned down by its own weight-"

Now it looped. Bio squeezed her thighs together and climaxed hard. Even harder than when she'd fucked Chrissi's huge butt. Now that butt looked puny in comparison to Bio's own. Bio did love being a huge-booty girl. So now that she was going to be even more of one, she couldn't contain her excitement. 

"Ooh!" she squirmed, loud enough to stir Chrissi awake. 

"Ooh~" Chrissi cooed, as she saw the grand sight of Bio's ever-expanding butt. She licked her lips and giggled. "Oooh, Bio-Booty! Chrissi's gonna have a wotta fun with dat!" The machine still blinked, the blue light turning on and off steadily. It hadn't needed to do anything to make Chrissi's words true.