SIN BETWEEN THE SHEETS

I knew I fucked up the moment his shadow fell over my desk.

"Miss Carter," he said in a calm but dangerous. "Care to explain this?"

I didn’t even look up. My heart was already hammering. He held up my cheat sheet between two fingers like it was a dirty pair of panties. I’d stuffed it under my test paper like an idiot. He found it. Of course he fucking found it.

I finally looked up. His eyes locked with mine, dark and tight behind his glasses.

"Stay after class."

That was it. No yelling. No public humiliation. Just those three words and the look that made my stomach twist.

He turned and walked back to his desk. The class continued in silence. I could feel every eye on me but all I could think about was him. The way he moved. The way he spoke. The way I knew he was going to fuck me up.

When the bell rang, chairs scraped back and students rushed out. I stayed in my seat. He didn’t even glance at me until the door shut and we were alone.

"Get up," he said.

I stood.

"Come here."

I walked to his desk, slow, nervous. He didn’t look at me until I was standing right in front of him. Then his eyes dragged over me. My tight top. My short skirt. My thighs. My trembling fingers.

He leaned back in his chair, legs spread, one hand resting on his knee. The other still holding the cheat sheet.

"You thought you were clever."

I swallowed.

He tossed the paper onto the desk.

"You know what I should do," he said. "Fail you. Report you."

I opened my mouth. Nothing came out.

"But you want something else, don’t you?"

My eyes snapped to his.

"You want me to give you another chance."

I nodded slowly.

His lip curled just a little.

"Then you're going to earn it."

I didn’t speak. I couldn’t. My thighs pressed together. My panties were already soaked.

"Turn around," he said.

I did.

"Bend over the desk."

My breath caught in my throat as I hesitated.

He stood behind me. "I said bend over."

I bent. My hips pressed against the desk. I felt exposed. Powerless and God… Wet.

His hand came down hard on my ass.

I yelped.

"Skirt up."

I reached back, lifted it, heart pounding like crazy.

"Panties off."

I slid them down to my knees, then let them fall to the floor. I felt him move behind me. I could feel him. The heat of him. The way I could tell he was staring at me.

"You cheated in my class," he said. "Now I get to do whatever I want."

His hand slid between my thighs, fingers gliding through my slick folds.

"You're soaked," he muttered. "Fucking filthy."

His fingers pushed inside me. Two, fast and rough. I moaned, knees shaking.

"You're going to take it all," he said. "Every inch. Every punishment. Every filthy thing I give you."

He pulled his fingers out and slapped my pussy and I gasped.

Then I heard the sound of his belt unbuckling. And I knew I was about to be fucked in ways I’d only fantasized about.

I heard the zipper.

Then the sound of him spitting into his palm.

"You better not fucking move," he said, voice low behind me.

My breath hitched as I felt the head of his cock press against my entrance. Thick. Hot. Unforgiving.

And then—he shoved it in. No warning. No easing. Just full, hard, and deep.

"Fuuuck," I choked, gripping the edge of the desk with both hands as he buried himself inside me.

"Yeah," he growled. "Take it. That's what you wanted, right?"

He didn’t wait for an answer. His hips snapped forward, slamming into me with a force that rocked the desk. The wood squeaked under our bodies. My skin burned with friction. His cock filled me like I was made for it, hitting deep, hard, punishing.

"Little cheater slut," he muttered through gritted teeth. "Too lazy to study, but real good at taking dick."

I moaned. Loud. Raw. My voice bounced off the empty classroom walls. He grabbed my hair and yanked my head back, bending over me.

"You like being used, huh?"

I whimpered, my face hot. My pussy dripping.

"Answer me."

"Yes," I gasped. "Yes, sir."

He groaned into my ear and fucked me even harder, faster. His hips slammed into my ass again and again until the sharp slap of skin was all I could hear.

His hand came down on my ass again, stinging, and I cried out.

"You sound so good when you're being fucked like a dirty little thing," he said.

My legs were shaking. My thighs quivering. I was already close—so damn close—and he knew it. He could feel how tight I was clenching around him.

He pulled out suddenly. I almost screamed at the loss.

"Get on your knees," he snapped.

I dropped fast, breathing hard, knees hitting the cold classroom floor. He grabbed the base of his cock and slapped it against my cheek.

"Open."

I did.

He shoved it into my mouth without hesitation, making me choke. His hand curled in my hair, holding my head still while he fucked my throat.

"Just like that," he groaned. "Let me use that smart little mouth you wasted on cheating."

My eyes watered. Drool spilled down my chin. He was relentless, pushing deep, pulling out, then forcing back in again.

I gagged, but I didn’t stop. I wanted it. Needed it. My pussy throbbed just from the sounds he was making above me. Grunts, curses, low praise twisted in filth.

Then he pulled out again, a long strand of spit connecting his tip to my lips.

"Turn around. Bend over. Now."

I scrambled to obey, breathless and dripping. He lined up behind me again, rubbing his cock between my folds, coating himself in everything I was leaking.

"Let’s finish what we started."

And then he pushed back in, deep, harder than before.

And kept going.