I slammed the door behind me and there she was, my sister Rachel, bent over the kitchen table in nothing but a tiny tank top that barely contained her massive tits. Those big, heavy jugs hung low and swung as she straightened up, nipples poking hard through the thin fabric.
She was eighteen, legal as fuck, and she knew exactly what she was doing flashing that body at me every chance she got.
"Bro, you look pissed," she said, voice low and teasing. Her tits jiggled with every word. "Mom and Dad won't be back till tomorrow. You gonna do something about it or just stare?"
I didn't answer with words. I grabbed her by the waist and spun her around, yanking that tank top up and over her head. Her huge tits spilled out, full and round with thick pink nipples already stiff. I squeezed them hard, fingers sinking into the soft flesh, and she moaned like a slut.
"Fuck yes," she hissed. "Suck on your sister's big tits."
I latched onto one nipple, biting and sucking while my hand mauled the other. They were so goddamn big my palm couldn't cover them. Rachel arched her back, pushing more tit into my mouth. I slapped the side of one, watching it ripple, then switched to the other, leaving red marks from my teeth.
She dropped to her knees right there on the kitchen floor and yanked my shorts down. My cock sprang out, already leaking. She wrapped both hands around it and those massive tits together, smothering my dick between them. The soft, warm flesh engulfed me completely.
"Look at that," she said, spitting on the head so it slid easier. "My big brother fucking my big tits. You love it, don't you?"
I thrust between them, the head of my cock popping out near her mouth each time. She licked it on every stroke, tongue swirling around the tip. Spit and precum made everything slick. Her tits felt incredible, heavy and hot, bouncing with each pump.
After a minute I couldn't take it. I hauled her up, bent her over the table again, and ripped her shorts down. Her ass was thick, but those tits pressed flat against the wood, spilling out the sides. I kicked her legs apart and drove my cock straight into her wet pussy.
She was tight but soaked. I fucked her hard from behind, hips slapping against her ass while I reached around and grabbed those swinging tits. I squeezed them like handles, pulling her back onto my cock with every thrust.
"Harder," she begged. "Fuck your sister harder. Use these big tits."
I flipped her onto her back on the table, lifted her legs, and slammed back in. Her massive tits bounced wildly with every stroke, slapping together. I leaned down and sucked one nipple again while pounding her, then reached up and pinched both hard.
Rachel came first, pussy clenching around my dick as she screamed. Her whole body shook and those tits quivered. I didn't stop. I kept driving into her, watching her big jugs shake, until I pulled out and shot thick ropes across her stomach and tits. Cum splattered over the pale skin and dripped down between them.
We weren't done.
She climbed off the table, pushed me into a chair, and straddled me. Those huge tits smothered my face as she sank down on my cock again. I grabbed two handfuls and motorboated them while she rode me, grinding her clit against me. Every bounce made her tits slap my cheeks.
"These big tits are yours now," she panted. "Whenever you want to fuck them, use them, cum on them. Tell me."
I growled against her cleavage. "They're mine. My sister's big fucking tits."
She came again, grinding harder, then slid off and dropped back to her knees. She pressed her tits around my cock once more and jerked me with them until I unloaded a second load across her face and those massive mounds. Cum ran down her chin and pooled in her cleavage.
We spent the rest of the night like that, moving from room to room. I fucked her tits in the shower, bent her over the couch while I slapped and squeezed them from behind, and finally took her to her bed where she rode me reverse so I could watch those huge tits bounce in the mirror. By morning she was covered in my cum and my handprints, and both of us were already planning the next time Mom and Dad would be gone.
Her big tits belonged to me now, and she made sure I knew it every single day after.
