What about two siblings fattening each other up but they're in love with each other
Stop corrupting me into this >.< (Joke I love I can't lie I get so horny writting this stuff lol)
In my head this can go many ways, but right now I’m picturing it like this: her older brother, once a fit, chiseled, jaw-droppingly handsome guy who turned heads everywhere he went… and his younger sister, who used to be so skinny but had blossomed into this irresistibly soft, chubby temptress with the cutest face, massive heavy tits that strained against every top, a plush, jiggly round ass that wobbled with every step, and the most delicious chubby double belly that hung over her waistband like an invitation to touch, squeeze, and bury your face in.
They’d crossed the line into a secret, filthy relationship a year ago, and that’s when everything deliciously spiraled. At first he played the caring older brother—sabotaging her diets by “accidentally” throwing out her healthy meals, canceling her gym plans with surprise dates, and constantly overfeeding her rich, greasy, calorie-packed food until her once-flat stomach swelled into that perfect double belly. She’d been obnoxious about it in the beginning, pouting and blaming “relationship weight,” but deep down the attention, the constant worship of her growing curves, and the way he groaned every time he grabbed handfuls of her softening body started to make her wet.
When she finally confronted him about how out of control her weight had gotten, he just pulled her into his lap, hands sinking deep into her plush hips, and denied everything with that charming smirk. “You look so much fucking better like this, sis… softer, sexier, made for me.” She blushed hard, her pussy throbbing despite herself, still upset but undeniably turned on by how much he craved her bigger body.
That was the moment she decided to flip the script. If I’m getting fat, you’re coming down with me, big brother.
From then on it became a wicked, addictive game of mutual corruption. Every time he tried to eat something healthy, she’d show up with bags of greasy fast food, pressing greasy burgers and fries to his lips while straddling him, grinding her fat ass against his cock until he gave in and devoured everything with her. If he tried to hit the gym, she’d distract him in the most sinful ways—lounging naked on the bed with her heavy tits spilling out, belly resting on her thick thighs, begging him to come feed her instead… or better yet, feed on her. She’d keep him in bed for hours, riding him slow and deep while stuffing him with snacks, whispering filthy encouragement as his once-hard abs started to soften under her hands.
He resisted at first… but fuck, the way she moaned when she fed him, the way her own body kept swelling bigger and softer because of him, it broke something in him. Soon he stopped fighting it. He started bringing her even more food, ordering late-night feasts just so he could watch her belly stretch and gurgle as she stuffed herself senseless. Their corruption fed on itself—every pound she gained made him hornier, and every pound he gained made her drip with need. They began encouraging each other openly, obsessively.
“More, baby… I want you huge,” he’d growl, rubbing her massive, doughy belly while force-feeding her thick shakes, his own gut starting to hang heavily between them.
“Only if you get even fatter with me, bro,” she’d whimper back, her voice thick with lust as she shoved pizza into his mouth, grinding her soaked pussy against his thickening thigh.
Month after month they spiraled deeper. His sharp jawline disappeared under a soft double chin. His athletic frame ballooned into a massive, heavy-bellied man with thick love handles and a huge, sagging gut that pressed against her when they fucked. She, in turn, exploded in size—her tits becoming enormous, pendulous orbs, her ass a vast, cellulite-dimpled shelf, her belly a gigantic, multi-tiered apron of pure fat that rested on her thunderous thighs. They were no longer recognizable as the fit brother and chubby sister they once were. They were two obscene, massively obese blobs, barely able to move without panting and sweating, completely addicted to the feeling of their bodies swelling bigger, heavier, softer.
They lived for it now—endless days spent in bed, surrounded by takeout boxes and empty wrappers, feeding each other with sticky, greedy hands while they fucked slow and messy, their enormous bellies slapping and rubbing together. Every extra pound was proof of their twisted love. They corrupted each other so perfectly, so completely, that nothing else mattered anymore. Just the growing. Just the pleasure. Just the two of them, fatter and more hopelessly addicted to one another with every single calorie.
