Jake slammed the door behind him and grabbed his younger brother by the hips the second he stepped into the kitchen. "You been walking around all day with that belly sticking out, knowing it drives me fucking crazy," he growled, yanking Ryan's shirt up and off. Ryan's round, pregnant gut bounced free, tight skin stretched shiny over the heavy swell. Eight months along and carrying Jake's kid, his brother's body was pure filth now—tits a little fuller, ass even thicker, hole always slick and ready.
"Been leaking all day thinking about your cock," Ryan admitted, voice rough. He turned and bent over the counter, shoving his sweats down. His hole winked, already wet from the pregnancy hormones that kept him horny nonstop. Jake didn't waste time. He spit on his hand, slicked his thick cock, and shoved straight in, balls-deep in one thrust.
"Fuck yes, stretch that pregnant cunt," Jake grunted, gripping Ryan's hips and pounding hard. The wet slap of skin filled the room. Ryan's belly swung under him with every slam, heavy and full. Jake reached around and rubbed the taut skin, feeling their baby kick while he fucked his brother raw. "This is my load that did this. My seed knocked you up. You love carrying your big brother's baby, don't you?"
Ryan moaned loud, pushing back to meet every thrust. "Yeah, breed me again, Jake. Fuck another one in me while this one's still inside." His cock hung heavy and dripping between his legs, untouched. Jake's pace turned brutal, hips snapping as he used Ryan's hole like he owned it—which he did. The incest rush never faded; every time he buried his cock in his brother's ass it felt dirtier, hotter.
Jake pulled out just long enough to spin Ryan around and lift him onto the counter. Ryan's legs spread wide, belly resting on his thighs as Jake drove back in. They locked eyes, both breathing hard. "Gonna fill you up again," Jake promised, pounding deep. Ryan's hole clenched around him, milking every inch. Jake came with a low groan, pumping thick ropes of cum straight into his brother's guts. Ryan followed right after, untouched cock spurting across his own pregnant belly.
They didn't stop there.

Later that night Jake had Ryan on all fours on the bed, face buried in the pillows while he ate his brother's hole, tasting his own cum mixed with Ryan's slick. He tongue-fucked him open again, then mounted him slow and deep, one hand rubbing the underside of that swollen belly the whole time. Ryan begged for it harder, dirtier, telling Jake exactly how it felt to be pregnant with his brother's child and still getting fucked senseless every night.
By morning Ryan was on his back, legs hooked over Jake's shoulders, belly wobbling between them as Jake fucked another load deep. "Gonna keep you pregnant," Jake snarled. "Keep filling this hole until you're always carrying my kid." Ryan came hard, hole pulsing, belly tight and full, already dreaming about the next round.