buttexpansioncaps:

His wife was wildly out of control, he thought, his briefs stretching ever tighter against his shaking, twerking ass. She kept making him get bigger, day in, day out, and his ass was already ridiculously large. Comically huge. Insanely gigantic! She had other words for it–bubblicious, soft, pudding booty, squeezable–and a hundred others she liked to mutter while she was fondling it, usually while she was feeling him short-order pile on another five or ten pounds.

Today, she was content to watch him dance, his face flushing slightly from the combination of arousal and faint embarrassment. Did it have to be Nicki Minaj? He was still rock hard, stiff, his briefs drawing tight and cinching down against his pre-leaking cock as they ran out of room on his plus-sized body. He wondered how long it would take before she got bored and–mmmmmmph, there it was. Her hands sank into him, pressing his hips down into the bed, grinding his cock against the bedsheets. “Oh my god, babe,” she growled, nipping at his ear, her lithe body comfortably resting on his much larger one. “You are just so fucking hot like this. You don’t mind right? Especially not if you get a little thicker?”

“This is questioning under duress,” he managed to string together, gasping and turning as she rose up off of him, tugging his legs to flip him over. Then her panties were wet and grinding along his bulge, her legs squeezing into his hips and barely able to straddle his plush legs. Truth be told, as long as she kept following up her little growth fetish sessions with this, he didn’t mind, actually. Not at all.