Balros & Echoen
Balros grins broadly, wiggling his tail and nodding vigorously. All the nearby rat girls start getting fat bellies and fatter tits, hormones cranked up to 11

LlunaBlue
Their hips doubling in width, pussies puffing up and throbbing visibly from behind, between their fattening cheeks~

Balros & Echoen
The rat family next door is in a panic. Brother and sister rat were playing in their room when the ratgirl's ass swiftly filled out her pants, and then some, her lower body maturing years in moments. Estrus and pheremones belched from her snatch, hotboxing the entire apartment, so potent the boyrat spunked his pants several times. Mommarat and daddyrat try to calm her down, wipe her sweaty body with a rag.

LlunaBlue
Daddyrat begins sweating just as bad, with one of his paws just forgetting to keep hold of the rag as he started stroking and squeezing his daughter instead. His pants soaked with copious, endless amounts of spunk as his brain is flooded with pheremones telling him that his daughter has become the most viable mate in the world. Efforts by mommarat to stop him from molesting their daughter are interrupted by their son roughly grabbing her thiccening ass, burying his face in and inhaling deeply 

Balros & Echoen
The boyrats swiftly show signs of becoming slavishly addicted to the ratgirl, her father most of all, his bare pink paws craving to stroke through the sweatmusk-stained fur of his heavenly daughter. His balls churn and ache as they bloat bigger, producing more and more cum to breed with, his inhibitions lowering. His wiferat tries to stop him, to pull him back or push him away, but the constant attention from her corrupted son has her in nearly as bad a way, butt and hips expanding twice their size and her sloppy cunt on display between her huge thighs. She cums from her son licking her out... her squeaks getting higher pitched as she starts to get younger, cuter, just like her daughter. The boyrats blow their seeded loads all over the both of them, giving both girls a firm fullness to their bellies that wasn't there before.