The door creaked open, and I froze. I peered through the crack, my breath catching in my throat. There they were, my wife, Jessica, and my high school bully, Mark, entangled in a passionate embrace on our living room couch. The sight was both horrifying and mesmerizing, a twisted blend of betrayal and voyeuristic thrill.

"Mark, you're so rough," Jessica moaned, her voice dripping with lust. "I love it."

My fists clenched at my sides, but I couldn't tear my eyes away. Mark's hands roamed over her body, his fingers digging into her flesh as he kissed her neck, leaving red marks in their wake. He was everything I wasn't—strong, confident, and domineering. And she craved that.

"You like that, huh?" Mark growled, his voice low and commanding. "You like being dominated by me?"

Jessica whimpered in response, arching her back to press herself closer to him. "Yes, yes, please, Mark, don't stop."

I felt a sickening mix of anger and arousal churning in my gut. How could she do this to me? How could she prefer him over me? But even as the questions swirled in my mind, my hand found its way to my crotch, unzipping my pants and freeing my aching erection.

"That's it, baby," Mark whispered, his lips brushing against her ear. "Show me how much you want it."

Jessica's hips bucked against him, grinding herself against his hardness. Her blouse had ridden up, exposing her smooth, pale skin to his greedy hands. He cupped her breasts, squeezing them roughly as she gasped and writhed beneath him.

"Fuck, you're so tight," Mark groaned, his voice strained with desire. "I can't wait to be inside you again."

My jaw tightened as I watched, my own cock throbbing in my hand. I should have stopped them. I should have stormed in there and put an end to this humiliating display. But I didn't. Instead, I stroked myself faster, imagining it was my hand on her, my cock inside her.

"Please, Mark," Jessica begged, her voice breaking. "I need you. I need you now."

Mark smirked, his eyes dark with satisfaction. "Anything for you, Jess."

He pulled her skirt up, revealing her bare, glistening pussy. My breath hitched as I saw how wet she was, how ready she was for him. He positioned himself at her entrance, teasing her with the tip of his cock before thrusting inside her with one swift motion.

"Ah!" Jessica cried out, her nails digging into his shoulders. "Yes, yes, just like that!"

Mark began to move, his hips snapping forward with brutal precision. Each thrust sent shockwaves of pleasure through her body, her back arching off the couch as she rode the waves of ecstasy.

"Oh God, Mark, you feel so good," she panted, her eyes fluttering closed. "Don't stop, please don't stop."

I couldn't take it anymore. My hand flew over my cock, pumping furiously as I watched them. The sounds of their bodies slapping together filled the room, drowning out the rational part of my brain that screamed at me to stop.

"Look at me, Jess," Mark commanded, his voice cutting through the haze of lust. "Look at me while I fuck you."

She obeyed, her eyes locking onto his as he continued to pound into her. The intensity in her gaze made my heart ache, but I couldn't look away. I was trapped in the web of their passion, ensnared by the very thing that was destroying me.

"That's it, baby," Mark purred, his voice dripping with satisfaction. "Take it all. Take every inch of me."

Jessica's mouth opened in a silent scream as she came, her body convulsing around his cock. Mark followed shortly after, his groan of release echoing through the room. They collapsed together, spent and sated, their breaths mingling as they recovered.

I stood there, my hand still wrapped around my cock, my own orgasm building in my balls. I watched as Mark slowly withdrew from her, his cum oozing out of her pussy and staining the fabric of her skirt.

"Clean me up, Jess," Mark ordered, his voice lazy with contentment. "Make sure you get every drop."

Jessica nodded, her movements slow and deliberate as she leaned down and began to lick him clean. My stomach churned as I watched, but I couldn't stop myself. I was too far gone, too deep in the throes of humiliation and arousal.

"Good girl," Mark murmured, his hand caressing her hair. "You always know just what to do."

I finally reached my breaking point, my orgasm exploding from my cock in a torrent of white-hot pleasure. I bit my lip to stifle a cry, my hand moving frantically as I spilled my seed onto the floor.

As I came down from my high, I realized what I had done. I had allowed this to happen. I had let them use me, manipulate me, and I had enjoyed it.

But as I looked at them, still entwined on the couch, I knew there was no going back. This was my life now, my reality. And as much as it hurt, as much as it humiliated me, I couldn't deny the truth.

I was a cuckold.