Fill him up.

“A-a cum belly! Give me a cum belly! Fill me up”, he cries.

Grunting, gritting your teeth, you squeeze his hips and thrust your hardest. Sealing your bodies together, the surge begins.

Audible churning and sloshing travels up your shaft and into his bunny belly. The minor pudge he has before gives way to a rapidly bloating shape. Shot upon shot of hot, sticky splooge stuffs him fuller. Your bunny looks down at you, cum-drunk and slams his lips to yours, kissing you lovingly. His tongue mingles with your own, the growing shape between you dividing the contact more and more.

Your balls shrink smaller and smaller, no less than the lemons they had been before your second growth, the cum that had been keeping them so large now deposited inside your brother’s shapely body. His once soft tummy is now distended and full of roughly two and a half gallons of your baby-batter. He nods off, rolling beside you and hiccuping. Your rod still buried, the two of you take some time to recover.

He snuggles closer to you, holding your hand over his belly and humming. You press deeper inside and kiss his neck softly. Sleep comes swiftly to take you away. Who knows what you might do when you wake up? Or if someone will interrupt you?