After-Hours Anal: Dirty Professor and Grad Student Anal Sex Story

Professor Mark Dalton was the kind of man who owned a room the second he walked in—tall, broad-shouldered, with disheveled salt-and-pepper hair and piercing blue eyes. At 42, he carried a quiet, dangerous confidence that made every one of his grad students wet—none more so than Cassie. Cassie, a brunette bombshell with thick hips, a tight waist, and heavy, natural tits barely contained by her low-cut sweater, had been fantasizing about Mark since her first day.

Late on Friday, the building was empty except for them. Cassie pressed herself closer as they sorted through old research notes, her voice low and purposeful.

"Anything else you want, Professor?" she breathed, letting her hip brush his thigh. Mark's jaw tightened. He inhaled the scent of her shampoo, his cock already hardening under his slacks.

"You have no idea what I want, Cassie," he growled. She shivered, her nipples pebbling beneath the thin fabric. She turned, putting her ass right against his cock, grinding in small, slow circles.

"Why don’t you show me?" she whispered, pulling his hand. He didn't hesitate.

He spun her, pressing her against the cluttered desk. His lips crashed onto hers, tongue plunging into her eager mouth. Cassie moaned, grabbing his hair and raking her nails down his back. Mark’s hands squeezed her ass, kneading the thick flesh, fingers digging in hard.

He ripped her tights down and yanked her panties aside, groaning at the sight. "Fuck, Cassie. Look at this ass. All semester I've wanted it."

"It's all yours, Professor," she purred, wiggling her round cheeks. "Take it. Use me. I want your cock in my ass."

He spat in his hand, slicking up her tight hole, spreading her cheeks wide. His cock—thick, veiny, leaking precum—pressed right against her puckered entrance. Cassie whimpered, gasping, "Yes, please, fuck my ass! Give it to me!"

He pushed in, slow at first, stretching her tight ring inch by inch. Cassie's knuckles turned white as she grabbed the edge of the desk, moaning loud and needy. "God, you're so fucking tight," he groaned, sinking deeper, feeling her ass tremble around his cock. He bottomed out with a hard thrust, their bodies slamming together.

"Oh, fuck! Yes! Fuck my ass just like that!" Cassie cried, eyes wild, hair falling in her face. Mark started fucking her hard, hips snapping, the sound of skin slapping echoing in the empty office. Every thrust made Cassie grunt, her ass swallowing him deeper.

"You like having your professor’s cock in your ass, slut?" he growled, slapping one cheek. She yelped, loving the sting.

"I fucking love it! Use me, Professor. Fill my ass. Fuck me harder!"

He pulled her up, forcing her to bend over the desk, tits spilling free now. He reached around, pinching her nipples, tweaking them hard while pounding her ass relentlessly. Cassie sobbed with pleasure, her pussy dripping down her thighs.

"Touch your clit while I fuck your ass," he ordered. Obedient, Cassie rubbed her swollen clit with desperate fingers, begging, "I'm gonna cum, Professor! Please, fill me up!"

He yanked her hair, pulling her head back so she could see him in the reflection of the office window, watching her get reamed. "You want my cum deep in your ass, don't you?"

"Yes, please! Cum in me, fill my ass! Fuck, I'm cumming!" Her moan tore from her lips as she shuddered, orgasm ripping through her, clit throbbing under her own fingers as Mark hammered her ass. He grunted, balls tightening, and exploded inside her, hot spurts filling her, making her gasp at the sensation.

He didn’t stop there. Dragging her onto his lap in the desk chair, he spread her open, his fingers now plunging into her sopping wet pussy, thumb circling her clit. Cassie rode his cock reverse cowgirl, his spent cock sliding in and out of her wrecked ass. She bounced, tits jiggling, her face wild with lust.

"Fuck, you're my filthy little girl," he growled, jerking her hips up and down. "You want more in your pussy?"

She nodded, desperate. "Yes, fuck me, fill me everywhere."

He shoved two fingers in her pussy alongside his cock in her ass—double penetration. She shrieked, body shaking, overwhelmed by sensation, his fingers curling against her g-spot as she bounced, his cock stretching her ass. He reached around, slapping her clit until she broke again, soaking his thighs, muscles clamping down tight.

Mark stood, laying her back over the desk. He lined up, spit-slicking his cock, and pressed it into her raw, needy ass while fingering her pussy. "Never gonna forget this fucking ass," he snarled, pounding her, her cheeks red from slap marks.

"Don't stop, please, please, fuck, fill me up one more time," she begged, voice hoarse.

He slammed into her harder, hand wrapped around her throat, owning her completely until his cock throbbed and he came again, messy and loud. His cum leaked out around his cock, dripping down her thigh as he collapsed on top of her, mouth whispering filthy praise against her ear.

Cassie lay there, fucked out, smiling wickedly. "Office hours next week, Professor?"

Mark grinned, already thinking about round two.