Mated at first sight

I twisted the doorknob and pushed the door open without knocking. I just wanted Jake’s charger from his desk. Nothing more.

The moment the gap widened, my body locked in place.

Jake was on his bed, pants shoved down to his ankles, legs spread wide. His hand gripped his long, thick cock, stroking it with fast, rough pumps. His eyes were closed tight, jaw clenched.

His voice came out in desperate, broken groans. “Fuck, Mia… yes, little sister… suck it just like that… take every inch…”

He was jerking off to me. My name on his lips sent a hot, shameful rush straight between my legs. My pussy clenched hard. I knew I should back out quietly.

Close the door. Pretend I saw nothing.

But my feet stayed rooted. The taboo hit me like electricity. This was my stepbrother. The guy who teased me at dinner. Now he was fantasizing about fucking me. The wrongness made my nipples harden painfully against my tank top.

My hand moved on its own. I cupped my breast through the thin fabric, squeezing hard. I pinched my nipple until it ached sharply. The sting felt good in a twisted way.

My other hand slid down my stomach, under my shorts and panties, straight to my soaked folds. I was dripping more than I expected. The wetness embarrassed me a little. I rubbed my clit in tight circles. Then I pushed two fingers deep inside my tight pussy, curling them.

I watched every detail. The way his balls tightened. How his thumb swiped over the leaking tip. The slick, obscene sounds of his hand working his meat.

My fingers pumped faster, matching his rhythm. I added a third finger, stretching myself. It burned slightly. But I kept going, fucking my own pussy right there in his doorway while he moaned my name.

“Mia… so tight… gonna cum in you, sis…”

My knees shook. I braced one hand on the doorframe. My other hand plunged deeper. My palm ground against my clit. Juices ran down my thighs.

I felt dirty. Exposed. Standing here touching myself while spying on him. The pressure built fast and brutal. My pussy clenched around my fingers. Wet sounds filled the hallway. I wondered if he could hear them. Part of me hoped he would. Part of me was terrified.

The orgasm slammed into me without warning. My whole body jerked. My pussy spasmed hard, gushing around my fingers.

Pleasure mixed with a strange guilt. I came standing there like a pervert. A loud, shaky moan tore from my throat before I could stop it. My legs nearly gave out. The aftershocks made my clit throb painfully.

Jake’s eyes flew open instantly.

“What the fuck?! Mia?! What are you doing?” he shouted. His voice cracked with shock. His hand froze on his cock.

He tried to cover it with both palms, but the thick length still bulged out. Impossible to hide.

I pulled my fingers out slowly. They were slick and shiny. My pussy still fluttered with leftover spasms. I stepped inside on unsteady legs.

I closed the door behind me with a quiet click. My heart pounded so hard it hurt. Shame burned my cheeks. But my body felt alive. Hungry.

I walked straight to the side of his bed. My legs felt weak. I looked down at the massive erection he was failing to cover.

“Nice dick,” I said. My voice came out low and husky.

Jake’s face burned red. He looked horrified, but his cock twitched visibly under his hands.

“This is so wrong… You’re my sister. My stepsister. I shouldn’t have said your name. Fuck, I’m sorry,  this is messed up.”

His eyes darted around the room,  to the door, the window, the clock. Pure panic. Like our parents would burst in any second.

I wondered if he felt as guilty as I did. Or if the fear made him harder.

I smiled, still breathing heavy from my climax. “It’s okay. Mom’s not around. She left for Aunt Clara’s and won’t be back until tomorrow night. The house is empty except for us.”

I reached down and wrapped my fingers around his wrists. I pulled his hands away. His cock sprang free. Heavy. Hot. Rock hard.

I closed my hand around the thick base. It felt hotter than I expected. Pulsing.

“God, it’s so big,” I whispered. I gave it one long, firm stroke from root to tip. The heat throbbed against my palm.

I stroked again, slower. Feeling every vein. Some parts felt smoother. Others ridged. It wasn’t perfect. But it made my freshly fucked pussy clench with fresh need.

Jake groaned deep in his throat. His hips bucked up despite his earlier words. I could tell he was fighting himself. Wanting this. Hating that he wanted it.

The conflict in his face turned me on more. Knowing we both felt dirty made it hotter.

“Mia… we really can’t do this…” His voice sounded strained. Like the words hurt to say.

I didn’t reply. I dropped to my knees between his spread legs. Bringing my face level with his throbbing cock. It looked even bigger up close. Intimidating.

I leaned in and dragged my warm tongue slowly up the entire length. Base to tip.

The taste was salty. Musky. A little bitter at the tip from his precum. Not amazing. But real. It made my stomach flutter with taboo excitement.

I licked back down, tracing the thick vein underneath. Then swirled my tongue around his balls. They felt heavy against my tongue.

I licked all the way up again in one long stroke. I repeated it. Covering every inch. Long, wet licks that made his cock glisten with my spit. My jaw started to ache a little from the angle. But I kept going.

Jake’s hands fisted the sheets. He didn’t push me away. I licked the underside again. Then focused on the head. Swirling and sucking lightly while my hand stroked the shaft.

I wondered what he was feeling. Did he think I was doing it right? Or was he comparing me to whatever fantasy he had? The uncertainty made me suck harder. Trying to make him lose control.

The taste of him kept filling my mouth. It made my pussy throb again. I kept licking. Coating his entire cock.

Worshipping the same length he had just been stroking while moaning my name. My knees pressed into the hard floor. It hurt after a while. But I stayed there.

I looked up at him. My lips brushed the tip. “Tell me to stop and I will.”

His broken groan and the way his cock jumped in my hand told me everything. He didn’t want me to stop. Neither did I.

The guilt sat heavy in my chest. But the hunger felt stronger. We were already too far gone.