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 thong. She was 22, I was 24, and we had been dancing around this for months since Mom and Dad moved out and left us the house. Tumblr had started it all. She kept sending me links late at night, those raw cum-in-sister stories where brothers unloaded deep inside their sisters and the girls begged for more. “Read this one,” she’d text, followed by a link full of dirty comments and grainy videos. I’d stroke my cock to them, imagining her voice saying the lines.
Tonight she was drunk on cheap wine and bold as hell. “Jake,” she said, looking back over her shoulder, “I want what those Tumblr girls get. I want you to cum in me.”
I didn’t waste time with questions. I stepped up behind her, yanked the thong down her thighs, and slapped her ass hard enough to leave a red handprint. Her pussy was already slick, lips puffy and glistening. I rubbed the head of my thick cock up and down her slit, coating myself in her juices.
“Say it again,” I growled.
“Cum in your sister,” she moaned. “Fill me up like those stories.”
I drove into her in one hard thrust. She was tight, hotter than any pussy I’d ever fucked, and she pushed back to take every inch. I gripped her hips and started pounding, the sound of skin slapping skin filling the kitchen. Her tank top rode up; I reached around and pinched her nipples until she cried out.
“Harder,” she panted. “Fuck your sister harder.”
I gave it to her. Every stroke bottomed out, my balls slapping against her clit. She reached down and rubbed herself while I railed her, juices dripping down my shaft and onto the floor. When she came the first time her walls clamped around me so tight I almost lost it right there.
I pulled out, spun her around, and lifted her onto the counter. Her legs wrapped around my waist and I sank back inside, watching her face while I fucked her. Her eyes were glassy, mouth open, moaning every filthy thing she’d read online.
“Cum in me, Jake. Breed your sister. I want it leaking out of me all night.”
I slammed into her faster, the counter creaking. Her tits bounced with every thrust. I felt my balls tighten and knew I was close. She locked her ankles behind me, refusing to let me pull out.
“Right there,” she gasped. “Don’t stop. Cum inside me.”
I buried myself to the hilt and exploded. Thick ropes of cum pumped deep into her pussy, pulse after pulse, filling her until it started to overflow around my cock. She came again the second she felt it, screaming my name, her cunt milking every drop.
We stayed locked together, breathing hard. When I finally pulled out, a thick stream of my cum ran out of her and down her thigh. She scooped some up with two fingers and licked them clean, eyes locked on mine.
“More,” she whispered. “Upstairs.
I want you to cum in me again until it’s dripping out of me every time I walk.”
I carried her to her bedroom, dropped her on the bed, and climbed between her legs. This time I took it slower at first, watching my cum-slick cock slide in and out of her. Then I flipped her onto her stomach, yanked her hips up, and fucked her like an animal. She buried her face in the pillow and begged louder with every thrust.
“Fill your sister again. I’m your cumdump. Use me.”
I came even harder the second time, grinding deep so every spurt stayed inside. When I pulled out she reached back and spread her ass cheeks, showing me the mess I’d made. White cum bubbled out of her swollen pussy and ran over her asshole.
We didn’t stop. All night I kept fucking her in every position the Tumblr stories described: on her back with her knees to her chest, riding me while she played with her clit, bent over the headboard while I held her hair. Each time I unloaded inside her she came with me, thanking me for breeding her like the dirty sister she was.
By morning her sheets were soaked and her pussy was a creamy mess. She lay there with her legs spread, watching more cum leak out, smiling like she’d just won the lottery.
“Post about it,” she said softly. “Tell them you came in your sister.”
I grabbed my phone, snapped a picture of her wrecked, cum-filled cunt, and typed the caption she wanted: “Cum in sister. Just like the stories.”
She moaned when she saw it, already reaching for my cock again. “One more time before breakfast?”
I was already hard. I rolled her onto her stomach, slid back into that hot, cum-slick hole, and gave my sister exactly what the Tumblr stories promised.
