Professor Harlan didn't even look up from his desk when I closed the door behind me. "Lock it," he said, voice flat like he was still lecturing. I turned the bolt and the click sounded loud in the empty classroom. My heart was already hammering.
"Skirt up," he ordered, still not raising his eyes from the stack of papers. "Panties off. Bend over the front desk."
I didn't hesitate. I hiked my skirt to my waist, hooked my thumbs in the thin cotton and shoved it down my thighs until it dropped to the floor. Then I walked to the desk at the front of the room, the same one I'd sat at three times a week for the whole semester, and bent forward until my tits pressed against the cool wood. My bare ass was up and open. I could feel how wet I already was.
Harlan stood. I heard his belt buckle, the zip, the rustle of fabric. Then his hand was on my lower back, holding me down. Two thick fingers pushed straight into my cunt without warning. I gasped. He pumped them hard a few times, checking how soaked I was.
"Always dripping for it," he muttered. "Fucking college slut."
He pulled his fingers out and I heard him suck them clean. Then the blunt head of his cock was pressing against my entrance. He didn't ease in. He drove his whole length inside me in one rough thrust. I bit my lip to keep from moaning too loud. The stretch burned in the best way.
Harlan fucked me like he was angry about it. Short, powerful strokes that rocked the desk. Every time his hips slapped my ass the sound echoed. His balls swung against my clit with each drive. I reached down and rubbed myself, two fingers circling fast because I knew he wouldn't do it for me.
"Keep your hand moving," he growled. "Come on my cock or I'm not finishing."
I worked my clit harder, grinding back to meet his thrusts. The desk edge dug into my hip bones. My pussy clenched around him, getting tighter with every stroke. He felt it and started pounding faster, grunting low in his throat.
When I came I had to shove my forearm into my mouth to muffle the noise. My cunt pulsed around his thick shaft. Harlan didn't slow down. He fucked me straight through it, using the extra slickness to go even deeper. My legs started shaking.
He pulled out suddenly, flipped me onto my back, and dragged me to the edge of the desk.

My legs went over his shoulders. He shoved back inside and leaned over me, one hand braced on the wood, the other gripping my throat just tight enough to make my head light.
"Look at me while I fill you," he said. His eyes were dark and mean. "You wanted this all semester. Now take it."
He fucked me in that position until sweat ran down his temple. The new angle made his cock drag right over my front wall. I came again, harder, my whole body jerking. This time I couldn't stay quiet. A broken moan slipped out. Harlan covered my mouth with his palm and kept thrusting.
When he was close he pulled out again, yanked me off the desk, and pushed me to my knees. His cock was shiny with my come. I opened my mouth and he fed it to me, both hands in my hair. He fucked my throat in short thrusts until his balls tightened and he unloaded. Thick, hot spurts hit the back of my tongue. I swallowed everything he gave me, then licked him clean while he watched.
Afterward he tucked himself away, zipped up, and sat back down like nothing had happened. I pulled my panties on with shaky hands, skirt falling back into place. My thighs were sticky.
"Same time Thursday," he said without looking up. "And don't wear underwear next time."
I unlocked the door and walked out into the empty hallway, cunt still throbbing, mouth still tasting like him. My phone buzzed in my bag. A text from my roommate asking if I wanted dinner. I typed back that I'd be late.