Balros
Balros squirms, staring at his elephant grrlfriend while shi's sleeping. To think shi was a cute, innocent phantgirl the night before, just someone he was supposed to babysit. But her mom left out these cookies for her... as if she knew what would happen. The growth, the gender transformation, the insatiable sex drive. Now he was trapped with this family of phants, to be hir constant caretaker.

Kai
The phant had been living a normal life up until her babysitter had arrived. From the start the night was normal, just hanging out watching TV, playing random games. But with each cookie she ate, she started to feel... different. She hit puberty only 2 hours in, and her tits had already swelled to chest filling proportions. Her hips widened, and she could only tell because they grew while sitting next to Balros, pressing into his hips while they sat on the couch. During her shower (that she invited Balros into for some reason, just felt right!) They watched as her package formed, stretching from above her much fatter pussy with two massive orbs dropping one by one into their new home, the massive sack between her thighs. The transformation drained her energy though, and she went to bed with Balros early, where they now found themselves. She twitched and her fist clenched, a wet dream forming in her hormone clouded mind. Her shaft twitched, hardening slowly as visions assaulted her brain. She watched her belly swell in that dream, kicks, squirms, orgasmic birth. All things she'd obviously never experienced, but something was telling her she needed it. Badly. The scent of her heat hit the squirrel like a train as a squirt of estrus came from between her young, motherly thighs, her shaft sliding across her hip before starting to erect before the squirrels eyes. She was huge. Her dick could easily reach her mouth if she leaned down, and a strong throb coaxed a jet of pre to splash against the wall behind her head.

Balros
*The squirrelboy'd been shocked to see such a change in someone so cute; from a flat chest to B-cups in hours, and B's to triple D's much shortly after that. A change in body odor from earthy and sweet to musky and dire. How the clothes hir mother picked out for hir stretched, tore, and snapped over widening hips and filling assfat, into more buttplump than even a whore should have a right to have. And how -needy-, and -clingy- shi got, pressing against him, clutching his soft fur and fluffy body with an incessant need as hir heat set in. He'd tried to refuse hir but somehow that only made hir grow faster and -more-, even to start to mutate into a heavy shaft and churning, loaded gray sac from how hir hormones were out of wack. He did his best to try to 'respect' hir, but it only led to hir intense sexual frustration and more growth spurts. Shi'd practically dragged the squirrelfloof to bed with hir, trunk clutched around his throat for most of the night, and soaked the bed with more and more estrus that flushed and spurt from hir swollen sex with more fluids than shi should have. His every breath was saturated with hir taste and scent, forcing his own fat pink spire to stiffen into an ungodly stiff erection; giving him such conflicted feelings as hir boner was as big as his.
He'd only managed to slip from hir trunk's grip in the morning due to how sweaty and slippery hir whole body had become, and how hir precum had kept getting poured onto him and hir. Nervous, soaked, and sweaty himself, he tried to slip away and shirk his responsibilities - only for an audadiously loud grrrrrrglr to rumble from hir womb, resonating somewhere deep in his brain. Instead of scurrying away, he repositioned himself... blushing hot as a brand, as he pushed his cock to the slippery lips of hir sex, sinking inside the tight clenching tunnel of velvety elephant fertility. Palming over one of hir huge breasts, he cuddled with hir as he sank in; and blushed as hir gushes of pre turned to jets of ivory elephant cum.*

Kai
Hir dreams became more vivid, flashing in and out between scenes. Shi hadn't realized how long shi had slept, nor did shi notice the squirrel leave hir trunk's grasp as shi slept. But she was squirming in hir sleep now, sweating, balls churning, womb gurgling with need as rope after thick rope of precum splattered across the wall, soaking hir bed with need as hir thighs involuntarily clenched around her fat mound. Still fast asleep and dreaming, shi hadn't noticed the invasion of hir babysitter's shaft, hir tunnel greedily clenching and quivering around that pink breeder. Hir balls bloated audibly, pre becoming less clear as ropes of actual spunk gushed across the bed, hir cock lurching up with each throb and spraying cum onto the squirrel and hirself. Shi'd grip the sheets, before suddenly opening hir eyes as his tip rammed hir cervix. She'd trumpet out in pure bliss at the feeling, hir first time being with someone who's dick rivaled hir forearm. Hir cunt quivered and clenched hard, squirting around his cock as she climaxed yet again, moaning out in bliss as hir trunk wrapped around the breast he wasn't groping. 
"H-hah, good morning B-balros~" 
Shi'd moan out, panting hotly as her thighs suddenly slid around his waist, ensuring he wouldn't escape until the deed was done.
"B-been having-Aaah!- D-dreams! I was -Nhhhahh!- P-pregnant!"

Balros
The way shi twitched, the way shi shuddered, the way shi -clenched- on his immense shaft - a cock that hirs was rivaling despite hir short stature - made him groan and thrust harder than he meant to. Pushing deeper into hir depths, feeling the way hir womb was so deep, and hot, and READY to breed. Gods, the way hir widened hips were pushed up by the sheer curve of hir fattened asscheeks, gave them the perfect angle to mate and breed. He felt hir nuts dragging over his shaft as he stuffed and throbbed deeper, clenching and fattening with more cum than shi poured out. THe room was saturated in hir spunk scent so quickly, and his face even got spattered by spritzes of elephant milk from hir big bouncing boobs. So, so much girl...
He couldn't stop, his own brain too fogged by the scents shi was pumping out, and the feeling of hir perfect pregnant-to-be body. That gray girl gut grew bigger as his boner bulged deep into it, finally waking hir and making so much noise as shi came and came and came. Fuck, he couldn't hold back - POWERWASHING hir belly with squirrelseed and all the babymaking batter shi could want.
Then, louder than hir own trumpeting, that belly. That womb. Those eggs, pumped full of cookie corruption hormones. RRRRROOOOAAAURURUGHGLLL. So shockingly loud that hir mother downstairs clutched her head and felt daughters kick in HER stomach too. The neighbors looking up in confusion as their stomachs swelled with elephant broodspawn. Family pets barking or mewling as gray trunks shoved from their pussies, the corruption so intense that it knocked everyone and everything up for blocks. So shockingly intense and sudden was hir pregnancy that the bed itself shuddered and SHATTERED under the sudden mass of gray girl belly bloating with a dozen more hyperherm elephant grrls in seconds, forming bumps and bulges and heavily detailed outlines of round feet, fat shafts, huge breasts, large hands, trunk-nosed faces, and wide-hipped butts.

Kai
the young girl was caught off guard as the squirrel suddenly thrust himself in and climaxed. Shi'd clench her thighs tight, but cried out in absolute pleasure as her belly let out that violent roar of production. Countless eggs fertilized instantly, growing rapidly. Shi couldn't tell what was happening around hir, but what was happening TO hir was the best thing she had ever felt. Hir belly lurched with growth, pushing the squirrel back as clones already as big as hir suddenly bulged against the grey, taut skin, their tits and shafts prominent. Shi was lost in bliss, trumpeting and cumming again and again as hir spawn grew, and in the tight confines of hir belly, began to breed. Shi couldn't see the owner of the cock buried in hir womb, but shi felt him, not letting him leave as she kept cumming between hir belly and him, soaking him in hir cum. Hir thighs refused to let him go, and she squirmed in delight as one of hir daughter suddenly slid their pussy onto his tip.
Shi watched as their bulges shifted in a way that looked like an orgy, just in time for the bed to shatter under hir. Shi whimpered and moaned, cumming again as shi watched the bulges slide under hir skin, the squirrel getting kicked and bumped by their kids as shi held him there while hir daughter did hir best to fuck him in return whilst in hir crowded womb. Shi was suddenly brought back to reality as shi heard stomping upstairs, the neighbors already fucking with their new phant bodies. Shi was in love with it all, moaning out for hir babysitter, who's body refused the corruption.