You look up in awe at your little sister's immense body, Mia giggling over you, her 12 foot form forced to bend over slightly to avoid hitting her head on your bedroom ceiling- her tits inches from your face; they were IMMENSE now, even for her size, jutting out like blubbery beachballs; her nipples the size of soda cans.
"You like my big boobs, Joey?" she laughs, and sits her fat, wide ass down on your bed, the box springs groaning and creaking ominously under her weight. You can scarcely deny, or conceal, the bulge in your jeans, but you manage to wrench your eyes away from Mia's gigantic, overdeveloped body to turn around. "N...no....we need to call somebody, a hospital...something....you're way too young to be so big!"
Mia's big hand catches you by the waist of your pants, giggling as you hear your mother leave for the weekend; "Be good, kids! I'll be back Monday!" And then the front door shuts.
"Who're you gonna tell?" Mia laughs, "Mom? You gonna call 9-11 and ask for the Boob Police?" She then moans as those tits of hers pulse and swell, growing yet fatter, heavier, and rounder, slowly filling up her lap. "They're getting bigger again!" she gasps, looking down at her bloating cleavage with a proud, toothy grin. You stop struggling against her grip, once again mezmerized by the sight of your kid sister's jugs, now even more immense; were she of average height, they would be M-cups or perhaps bigger.
Mia cupped her heavy boobs, groaning as she squeezed, pinched, and bounced them admiringly. "They feel, like, so so so amazing!" The titaness lifted a nipple up into her mouth, licked it, and sucked down on it, hard, moaning yet again, her wide, plump hips rocking back forth atop your tortured, overburdened bed.
Still trying to comprehend and rationalize the events of the last 30 minutes, you jump with a start as you feel Mia's giantess-sized hand push you to a side. "Move, big-LITTLE bro....I need to get to MY room..." Your bloated kid sister pushed her head, then, one-by-one, her tits, through your bedroom door, only getting stuck a bit when it came to fitting her now massive, round ass through. She grunted, forcing her hips against the doorway, which began to crack and splinter...and, eventually, widen.
It was then that you noticed the growth sodas were missing. Mia had them!
"M-Mia?" you called out into the hallway, "You're not gonna drink any more of those are you?!"
You hear a giggle from the now giantess-filled hallway. "Oh, no! Not right now...." you hear a grunt, and then a giddy giggle-"There's my phone! I'm gonna call my friends over, Joe! It's no fun being the only gimungous, big-booby and booty girl...."
There's nothing you can do; your bedroom door is being blocked entirely by your little sister's giant ass cheeks, and quite intentionally. You hear her dial up her friends, one after the other--some decline, some accept, some say "not right now"...
She then wiggles and rumbles her way down the stairs into the far more spacious living room of the house, stretching a little and sitting on the couch, which overflows with her copious ass-flesh, groans, creaks, and promptly snaps and flattens under Mia's butt. Your sister merely giggles at this, amused. "Oh well..." she eyes the front door expectantly, the growth sodas clasped in her right hand.
Watching from the top of the stairs, you see that the first to arrive is:
A. Deanna, Mia's nerdy, chubby, black friend. Extremely shy, but has a huge crush on you.
B. Sara. Blonde, tall--an early bloomer and a bit of a bully to your sister--you wonder why she invited her, really.
C. None, yet! But...Mia's body isn't done growing yet! Taller, curvier, and hornier...
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