I pushed open the door to my sister's apartment without knocking, the way I always did when I knew she was alone. Sarah was twenty-four, same as me, and we'd been circling this for years. Tonight the circle broke.
She stood in the kitchen in nothing but a thin tank top and panties, her nipples already hard against the cotton. "Took you long enough," she said, voice low and rough.
I crossed the room, grabbed her hips, and spun her around so her ass pressed against my cock. "You been waiting like this all day?" I yanked the panties down and shoved two fingers straight into her wet cunt. She was soaked, dripping down my hand.
"Fuck, yes," she gasped. "Been thinking about your dick since this morning."
I finger-fucked her hard against the counter, thumb rubbing her clit in fast circles. Her legs shook. When she started to moan too loud I covered her mouth with my free hand and kept pumping. She came quick and messy, juices running over my wrist.
I pulled my fingers out and shoved them into her mouth. "Taste it. Taste how bad you want your brother."
She sucked them clean, eyes locked on mine. Then she dropped to her knees right there on the kitchen floor and tore open my jeans. My cock sprang out and she swallowed it to the root in one greedy motion. No teasing, just wet, sloppy head, spit dripping down her chin while she gagged herself on it.
I fucked her throat for a minute, then hauled her up, bent her over the table, and slammed inside her from behind. Her pussy was tight and hot, gripping me like it had been waiting years. I pounded her hard, the table legs scraping the floor with every thrust.
"Harder," she begged. "Fuck your sister like you mean it."
I did. I grabbed her hair, yanked her head back, and drove into her until her ass cheeks slapped loud and red. When I felt her start to come again I reached under and pinched her clit. She screamed into the wood, body jerking, cunt pulsing around my cock.
I didn't stop. I flipped her onto her back on the table, legs spread wide, and fucked her straight through the orgasm. Her tits bounced with every thrust. I leaned down and sucked one nipple hard while I kept driving deep.
"Fill me up," she panted. "Come in your sister's pussy. Do it."
I buried myself to the balls and unloaded, thick pulses flooding her. She clenched around me, milking every drop, then pulled me down for a filthy kiss, tongues sliding, both of us tasting sweat and sex.
We didn't make it to the bedroom right away. I bent her over the couch next, then took her on the floor, her riding me reverse so I could watch my cock disappear into her stretched cunt while I slapped her ass. Every time I started to soften she sucked me hard again, dirty talk pouring out of her mouth between licks.
"Remember when we used to share a room? I used to listen to you jerk off and touch myself. Now I get the real thing."
By the third round I had her on all fours on the bed, face down, ass up, pounding her until she was hoarse from screaming. I came again deep inside her, then pulled out and watched my cum leak from her swollen pussy before I pushed it back in with my fingers.
We lay there afterward, sweaty and wrecked, her head on my chest. "This is fucked up," she said, smiling against my skin.
"Yeah," I answered, already getting hard again at the thought of round four. "And we're not stopping."
