Three days later, Kat was already a hot mess.
Her mother had, as promised, kept the house comically full of junk food, with an emphasis on things like cheap chocolate and dairy. As a result, Kat helplessly watched herself become the antithesis of what she used to be; a butterball with a wrecked digestive system and an ever-eroding sense of self-discipline. Her mother required her to drink eight glasses of chocolate milk a day, infused with protein shakes meant for people who spent most of their days on olympian workouts. In Kat, however, the concoctions only made her hopelessly gassy.
"Oh... fuuuuck..." she groaned, slowly making her way downstairs from her bedroom. From every step, she felt her ass-cheeks bobble and ripple, a sensation that was new to her. Her thighs were even starting to rub together, wearing out the material between her legs on her pajama pants. She tugged them up, her asscrack showing more and more as her butt took up more and more of her pajama's restraint.
"Kat, darling, I have your breakfast for you~!" Kat's mother called from the kitchen. "Hurry up, or I'll double your portions!"
Kat responded in a whiney tone. "Mom, I'm becoming more ass than woman! I've learned my mistake, I won't be a pig anymore..."
Kat's mother cut her off. "Now, now, you should've learned that before you started embarrassing me! At least this way, people won't think you being a glutton is my fault!" She gestured to a chair in the middle of the kitchen. "Sit down"
The chair loudly creaked, her butt pouring over the sides. "Can we at least slow this down?" Kat pleaded.
"Shoosh." her mother jabbed, placing a jug to her daughter's lips.
Ohhh... It tasted like a buttery, liquid cake! Kat moaned, despite herself- the past few sessions of this had given her an uncontrollable sweet tooth. With each gulp, she could feel herself widening, her stomach reaching farther on her lap. Her mother had her guzzle down two jugs of the buttery concoction.
"R-Rub my belly." Kat moaned, flustered and blushing. She looked like a water balloon.
"What?!"
"Rub it. Please. I need someone to. It's the least you can do."
Despite herself, Kat's mother sunk her hand into Kat's sore gut, still feeding pastries and doughnuts to her with the other.
This... Kat thought to herself, this isn't so bad. My diet's wrecked anyways... Who cares if I get fat and fart and burst out of my clothes? If I'm gonna indulge, I might as well like it...
Her stomach felt swollen, inflated. She grinned dumbly, letting go; a deep, brassy Phbbbrraaaappppht! burst out of her fattened rear. Her mother frowned sharply.
"W-We're done for today.G-Go back up to your room!" She complied, slowly, her belly sloshing loudly. Back in her room, she slapped her ass, sending more ripples through her whole body. "From now on, my whole life is just about my own indulgence!" she grinned.