I slammed the door behind me and there she was, my little sister Emily, bent over the kitchen counter in nothing but a tiny tank top and panties. She was 20, I was 22, and we had been dancing around this shit for months. Our parents were gone for the weekend, and the house felt thick with it.
"Fuck, Em," I growled, walking up behind her. "You know what that ass does to me."
She looked over her shoulder, biting her lip. "Then stop staring and do something about it, big brother."
I grabbed her hips hard and yanked her panties down. Her pussy was already slick, shaved smooth, lips puffy and ready. I freed my cock, thick and throbbing, and rubbed the head up and down her slit.
"You want this dick?" I asked, voice low and dirty.
"Yes," she moaned. "Put it in me. I want you to fuck me like you mean it."
I shoved in deep in one thrust. She was tight, hot, and wet as hell. Her walls gripped me as I started pounding her right there against the counter. Skin slapped loud and nasty. Every time I bottomed out she gasped.
"Goddamn, your pussy feels perfect," I grunted. "Been thinking about breeding this cunt all week."
Her head dropped forward.
"Do it. Fill me up. I want your cum deep."
I fucked her harder, hands bruising her hips. The thought of knocking her up made my balls tighten. I reached around and rubbed her clit fast and rough until she came, shaking and squeezing my cock.
But I wasn't done. I pulled out, spun her around, and lifted her onto the counter. Legs spread wide, I slammed back in. Her tits bounced under that tank top. I yanked it down and sucked a nipple hard while I drove into her.
"Going to pump you full," I told her between thrusts. "Going to breed my own sister. Watch that belly swell with my kid."
Emily moaned louder, nails digging into my back. "Yes, fuck, yes. Cum inside me. Make me pregnant."
I hammered faster, the wet sounds of her pussy taking my cock filling the kitchen. When I felt it coming I buried myself to the hilt and unloaded. Thick ropes of cum flooded her, pulse after pulse. I stayed deep, grinding, making sure every drop stayed inside.
We didn't stop there. I carried her to the couch, bent her over the arm, and took her again from behind. My cum leaked out around my cock but I just pushed it back in with every thrust. Dirty talk poured out of me.
"Look at this messy pussy. My sister's cunt leaking my load. You want more? Want me to knock you up tonight?"
She pushed back against me. "Don't stop. Breed me again. I want twins if you can give them to me."
Round two lasted longer. I flipped her onto her back, legs over my shoulders, and fucked her deep and steady. Her clit rubbed against me with every stroke. She came again, screaming my name, and I followed, flooding her a second time. Her belly already looked a little swollen from how much I'd pumped into her.
Later in bed I took her slow but still raw. Missionary, eye contact, my cock sliding through the mess we'd made. I told her every filthy detail.
"Going to keep you full all weekend. Every time you stand up my cum's going to drip down your thighs. And when your period doesn't come, you'll know I did it. My baby in your belly."
She wrapped her legs around me and whispered, "Do it. Make me yours forever."
By morning I had her on all fours again, ass up, face down, pounding another load into her fertile pussy. She begged for it, told me how she wanted to feel my kid kicking inside her. I came so hard my vision blurred, emptying everything I had left.
We lay there afterward, my softening cock still inside her, cum leaking out around it. Her hand rested on her lower belly.
"Think it took?" she asked.
I kissed her shoulder. "If not, we'll just keep trying until it does."
She smiled, already planning the next round.
