I was eight months gone when my brother Jake walked back into the house like he owned the place. My belly was huge, tight, and my tits had swollen up fat and heavy with milk. He dropped his bag, looked me over, and said, "Fuck, sis, you look like you need a real cock stretching that pregnant cunt again."
We didn't waste time talking. He grabbed me right there in the hallway, spun me around, and yanked my maternity shorts down. My pussy was already dripping. Jake shoved two fingers straight in, pumping them hard while he rubbed my swollen belly with his other hand. "This is my load in there," he growled. "My baby making you all round and horny."
I bent over the couch and spread my legs. He freed his thick cock and slammed it into me in one thrust. No slow build-up, just raw fucking. His hips slapped against my ass while my belly hung down and swung with every stroke. Milk leaked from my nipples onto the cushions. "Harder," I begged. "Fuck your pregnant sister like you mean it."
Jake grabbed my hips and pounded me deep. The wet sounds of his cock driving into my sloppy pussy filled the room. He reached around and squeezed my leaking tits, spraying milk across his fingers. "Gonna fill you up again," he grunted. "Keep this belly growing with more of my cum."
I came hard, clenching around his dick, but he didn't stop. He flipped me onto my back on the floor, lifted my legs over his shoulders, and drove back in. My pregnant belly pressed against his abs as he fucked me like a toy.

Every thrust made my tits bounce and leak more milk. He leaned down and sucked a nipple into his mouth, drinking while he kept pounding.
We moved to the bedroom after that. I climbed on top, riding him reverse so he could watch my ass and rub my belly from behind. His cock stayed buried in my cunt the whole time. I bounced hard, feeling him hit my cervix with every drop. "That's it, sis," he said. "Work that pregnant pussy on your brother's dick."
He came first, flooding me with thick ropes of cum until it leaked out around his shaft. I kept grinding until I came again, then collapsed forward. But he wasn't done. He rolled me onto my side, lifted one leg, and slid back inside my cum-filled hole. Slow, deep strokes this time, but still filthy. He fingered my clit while he fucked me, making me squirt around his cock.
Later that night he took me in the shower. I stood with my hands on the wall, belly out, while he fucked me from behind under the hot spray. Water mixed with the milk dripping from my tits and the cum running down my thighs. He came again, then made me suck him clean, swallowing the mix of our juices.
We kept going like that for weeks. Morning fucks where he woke me up by sliding into my pregnant cunt from behind. Afternoon quickies on the kitchen table with my belly resting on the wood while he railed me. Night sessions where he ate my pussy until I screamed, then flipped me over and fucked me until I was leaking from both ends.
Jake loved my body like this. He couldn't get enough of how swollen and used I looked. Every time he came inside me he talked about knocking me up again as soon as this baby was born. I just moaned and begged for more, spreading my legs wider so he could pound deeper.
By the time I hit nine months, we were fucking two or three times a day. My belly was massive, my pussy constantly sore and slick, and my brother still couldn't keep his cock out of me. He owned that pregnant hole, and we both knew it.