Professor Lena Hart sat in her office after class, grading papers when her student Marcus walked in and shut the door. He was twenty-two, tall, and held his phone up with a smirk. "I got the video of you fucking that guy from the bar last weekend," he said flat. "Your husband would love to see his wife on her knees sucking cock in a hotel room."
Lena's face went white. She was thirty-four, married five years, and that one stupid mistake was now in Marcus's hands. "What do you want?" she asked, voice tight.
Marcus didn't waste time. "I want your mouth on my dick right now. Or I send it to your husband and the dean."
She stared at him, heart pounding. Her pussy clenched despite the fear. Lena locked the door, dropped to her knees, and unzipped his jeans. His cock sprang out thick and hard. She wrapped her lips around it and sucked hard, taking him deep until her throat squeezed the head. Marcus groaned and grabbed her hair, fucking her face in steady thrusts. Spit ran down her chin as she gagged and slurped, cheeks hollowing with every pull.
"That's it, married slut," he growled. "Cheat on that husband with a student's cock."
Lena's nipples hardened under her blouse. She reached down and rubbed her clit through her panties while she blew him. Marcus pulled out and bent her over the desk. He yanked her skirt up, ripped her panties aside, and slammed his cock into her wet pussy in one thrust. She moaned loud as he pounded her, the desk creaking. His balls slapped her ass with every rough stroke. Lena came fast, pussy clenching around him, juices dripping down her thighs.
Marcus didn't stop. He flipped her onto her back, spread her legs wide, and fucked her harder. "Tell me you're my cheating whore now."
"I'm your cheating whore," she gasped, legs wrapped around him. He filled her with hot cum, pumping deep until it leaked out around his shaft.
After that first time, Marcus owned her. He texted her to meet him in empty classrooms, his car, even once in the faculty bathroom while her husband waited at home. Each time she spread her legs or opened her mouth, the blackmail kept her coming back. She cheated harder, letting him fuck her raw and cum inside her every time.
One afternoon in his dorm room, Marcus had her on all fours. He shoved his cock in her ass while she fingered her pussy. "Scream for it," he ordered. Lena did, pushing back on his dick as he stretched her tight hole. He spanked her ass red and called her names until she squirted on the sheets. Another night he made her call her husband while Marcus fucked her from behind, whispering dirty shit in her ear. She told her husband she was working late, voice shaking as Marcus's cum filled her again.
Lena started craving it. The risk, the dirtiness, the way Marcus used her body like it was his. She stopped wearing panties to class so he could bend her over anytime. In the parking lot after dark, he fucked her against his car, her tits out, skirt hiked, moaning while cars drove by. She came so hard her legs gave out.
Weeks later, Marcus had her in his bed again, riding him reverse cowgirl. She bounced on his cock, ass slapping his thighs, while he filmed it on his phone for his private collection. "Tell the camera how much you love cheating," he said.
"I love cheating on my husband with your cock," she panted, grinding down hard. He flipped her and drilled her missionary, legs over his shoulders, pounding her G-spot until she screamed through another orgasm. When he came, he pulled out and sprayed thick ropes across her face and tits, marking her like always.
Lena cleaned his cock with her tongue afterward, tasting their mixed cum. Marcus kept the videos and photos, but she stopped caring about the blackmail. She wanted the sex too much now. Every time her husband touched her, she thought of Marcus stretching her holes and using her like a dirty secret.
The arrangement lasted the whole semester. Lena became his on-call fucktoy, cheating in every filthy way he demanded. And she never once tried to stop him.