I slammed the front door shut and grabbed my sister by the waist the second she walked in from the kitchen. "Strip," I told her, voice low and rough. "Right fucking now."
Lisa was twenty-two, same as me, and she knew the drill. She peeled off her tank top and shorts without a word, tits bouncing free, nipples already hard. No panties. She never wore them anymore when I was home. Her shaved pussy glistened under the lights.
"Been thinking about this cunt all day," I said, shoving two fingers straight into her. She was soaked. "You been walking around dripping for your brother again?"
"Yes," she breathed, spreading her legs wider. "Fuck me. Fill me up."
I bent her over the kitchen table, yanked my cock out, and drove in balls-deep in one thrust. No warm-up. She cried out, pussy clenching tight around me. I fucked her hard, the table legs scraping the floor, my balls slapping her ass with every stroke.
"Take it," I growled. "Gonna breed this pussy tonight. Pump you so full you'll be leaking my cum for days."
She pushed back against me, moaning louder. "Do it.
Knock me up. I want your baby."
I grabbed her hips and pounded faster, the wet sounds of her cunt filling the room. Every thrust pushed her forward until her tits were mashed against the wood. I reached under and rubbed her clit in tight circles. She came fast, walls fluttering, juices running down my shaft.
I didn't stop. I kept slamming into her until my own orgasm hit, thick ropes of cum blasting deep inside her. I stayed buried, grinding to make sure every drop stayed in. When I finally pulled out, a white trail ran down her thigh. I scooped it up with my fingers and pushed it back into her.
"Keep that in there," I ordered. "We're not done."
We moved to the couch. She rode me next, sinking down on my cock while I sucked her nipples. "Milk these tits when they're full," I told her, biting one gently. "Gonna watch them swell with my kid."
She bounced faster, grinding her clit against me. "Yes, fuck, yes. Breed your sister."
I flipped her onto her back, legs over my shoulders, and fucked her deep and steady. The angle let me hit her cervix with every stroke. She came again, screaming my name, pussy milking me. I followed right after, another heavy load flooding her womb.
We spent the whole night like that. I took her in the shower, bent over the bed, on the floor. Every time I came inside her. No pulling out. No condoms. Just raw, messy breeding. By morning her pussy was puffy and red, cum leaking out every time she moved. She smiled, rubbing her belly.
"Think it took?" she asked.
I slid back into her again, already hard. "Only one way to make sure."
We kept going for weeks. Morning fucks before work, quickies in the car, long sessions at night where I pinned her down and pumped load after load into her. She started showing signs fast—sore tits, constant horniness. When the test finally turned positive, she showed me the stick while I was balls-deep in her from behind.
"Positive," she whispered. "You're going to be a daddy."
I came instantly, growling as I filled her once more. "Good girl. Now we keep fucking until you're showing."
And we did. Her belly rounded, her tits grew heavy, and I kept breeding her every night, raw and deep, claiming what was mine. Every thrust reminded us both exactly how this started—with nothing but filthy, free incest and the need to put a baby in her.
