My sister Carla had always been thick, the kind of chubby that made every part of her jiggle when she walked. At twenty-four she was all heavy tits, soft belly, wide ass and thick thighs, and I had been jerking off to the thought of fucking her for years. We were both adults, living in our parents’ house while we figured shit out, and one sticky summer night the tension finally snapped.
She came out of the shower wearing nothing but a towel that barely covered her ass. Water still dripped down her cleavage. I was on the couch in just boxers, my cock already half-hard from the heat. She looked at the bulge and didn’t look away.
“You staring at my tits again, little brother?” she said, voice low and dirty.
“Fuck yes. They’re huge.”
Carla dropped the towel. Her body was soft and pale, belly rounded, nipples dark and thick. Her pussy was shaved smooth, lips already glistening. She walked straight over, climbed into my lap, and ground her fat ass against my cock.
“Feel how wet I am for you?” she whispered. “Been thinking about your dick inside me all week.”
I grabbed two handfuls of her ass and squeezed. It overflowed my hands, soft and warm. I pulled her down and sucked one fat nipple into my mouth, biting just enough to make her moan. She reached between us, yanked my cock out, and rubbed the head against her slick folds.
“Put it in,” she demanded. “Fuck your chubby sister.”
I thrust up and sank into her tight, wet cunt in one stroke. She was so hot and snug around me I almost came right then. Carla started riding, her belly and tits bouncing heavily with every drop of her hips. The wet slap of her ass hitting my thighs filled the living room.
“Harder,” she growled. “Pound this fat pussy.”
I flipped her onto her back on the couch, hooked her thick legs over my shoulders, and slammed into her. Her belly jiggled, her big tits shook, and she kept talking filthy the whole time.
“God, your cock feels so good stretching me. I’ve wanted my brother’s dick for years. Fill me up.”
I fucked her deep and rough, watching her chubby body ripple under me. When I reached down and rubbed her swollen clit she came hard, pussy clenching and squirting around my shaft.
I didn’t stop. I kept pounding until she was whimpering, then pulled out and flipped her onto her knees.
Her ass looked obscene from behind, wide and soft, cheeks spread to show her dripping hole. I drove back in and grabbed her hips, using her body like a fuck toy. The sound of skin slapping skin was loud and nasty.
“Tell me you love your brother’s cock,” I ordered.
“I fucking love it,” she gasped. “Love getting railed by my own brother. Cum in me. Breed this chubby cunt.”
I slammed in one last time and unloaded, pumping thick ropes of cum deep inside her. She pushed back, milking every drop. When I finally pulled out, my load leaked out of her swollen pussy and ran down her thick thighs.
We didn’t move for a long minute. Then Carla turned, kissed me slow and dirty, and whispered against my mouth, “Round two in my bed. I want you to fuck my ass next.”
We spent the rest of the night doing exactly that, her soft body wrapped around mine, both of us finally getting what we had wanted for years. No guilt, just raw, filthy pleasure between two consenting adults who happened to be siblings.
