I slammed my cock deep into my sister's pregnant cunt the second I got home from work. She was already on all fours on the bed, belly hanging low and heavy, her swollen tits leaking milk onto the sheets. "Fuck, yes, fill me again," she growled, pushing back to take every inch. Her pussy was soaked and stretched from carrying my kid, gripping me tight as I pounded her without mercy.
We had crossed the line months ago, the first time I bent her over the kitchen counter and pumped a load into her. Now she was six months along, belly round and tight, and all she wanted was my dick slamming into her. I grabbed her hips hard, fingers digging into her soft flesh, and drove in balls-deep. The wet slap of skin on skin filled the room. Her juices ran down my shaft every time I pulled back.
"Harder, brother," she moaned, voice raw. "Fuck your pregnant sister like you mean it." I reached under her and squeezed one heavy tit, milk squirting between my fingers. She came almost instantly, cunt pulsing and flooding around my cock. I didn't slow down. I kept thrusting through her orgasm, chasing my own. Her belly swayed beneath her with every rough stroke.
I flipped her onto her back so I could watch her face while I fucked her. Her legs spread wide, belly jutting up, nipples dark and dripping.
I shoved back inside and started pounding again, watching her expression twist with pleasure and taboo heat. "This belly is mine," I snarled, rubbing my hand over the taut skin. "Mine from the load I shot in you." She nodded, biting her lip, eyes glassy.
Her hand slid down to rub her swollen clit while I fucked her. Milk leaked from her tits in little streams every time my hips slapped against her. The smell of sex and her pregnant body filled the air. I leaned down and sucked one nipple into my mouth, drinking the sweet milk as I kept thrusting. She cried out and came again, her pussy clamping down like a vice.
I pulled out just long enough to flip her onto her side, then slid back in from behind. One hand gripped her belly while the other reached around to pinch her clit. "You love getting knocked up by your own brother, don't you?" I grunted into her ear. "Love feeling this big belly while I wreck your cunt." She pushed back against me, moaning yes over and over. Her body trembled with another orgasm, milk spraying from her tits onto the bed.
I was close. I grabbed her hips and hammered into her, balls slapping against her ass. The wet, filthy sounds grew louder. When I finally blew, I buried myself to the hilt and unloaded rope after rope of thick cum deep inside her already pregnant pussy. She milked every drop, grinding back against me until I was empty.
We stayed locked together for a minute, breathing hard. Then she turned her head and kissed me messy and deep. "Don't pull out yet," she whispered. "I want to feel it leak out while you get hard again." My cock twitched inside her. It was going to be a long night.
Later, after a short break, she climbed on top. Her heavy belly rested on my stomach as she sank down onto my cock again. She rode me slow and dirty at first, then faster, tits bouncing and dripping milk everywhere. I reached up and squeezed them both, spraying warm milk across my chest while she ground her clit against me. "Breed me again," she panted. "Make this belly even bigger next time."
I thrust up to meet her, watching her face as she came once more. When I filled her a second time, she collapsed forward onto me, belly pressing between us, both of us slick with sweat, milk, and cum. We lay there catching our breath, my cock still buried inside her.
She smiled against my neck. "Round two in the shower?" I was already getting hard again inside her. The pregnancy had turned my sister into a nonstop fuck machine, and I had zero plans to stop.
