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I'd be completely uninterested at first, no matter how much she whined or pleaded or begged. The thought of another woman in our bed making a mockery of our sacred relationship. A relationship that I thought was meant to be filled with love and loyalty.
If my eyes ever lingered a second too long, she'd grin and smirk, whispering what vile things I could do to those tight holes. If my cock pulsed as she talked about other women while we fucked, she'd cum so much harder. If we found ourselves in bed, slightly touchy, but not quite fucking, she'd casually scroll through a friend's Instagram page. Little things to break me. To corrupt me.
Soon, it'd be commonplace to bring other girls up and... I would ā only because I'd want to see her reaction ā bring up a coworker. Some girl with perkier tits, glossier hair, and fatter ass. I wouldn't mean to turn her on. I promise. I definitely wouldn't bring up some hotter girl, that I could fuck anytime I wanted just to see my girlfriend spasm on my cock every night. God... watching her cum harder and harder as our fantasies grow every time we fuck... It would ruin me.
A single suggestion to invite her over. That's all it would take.
The next day, she'd find my cock buried in a tighter, wetter cunt. My coworker would ignore my pathetic cuck of a girlfriend as I groan and moan into her. My fingers holding her, wandering her skin more passionately than my girlfriend had ever felt. My cock stretching out that hole with each furious pounding. I'd find my girlfriend on her knees next to me, shock and lust, the line beyond blurred. The line vanishing. Boundaries dissipating.
Everything she ever wanted.
Intoxicating power that I'd never felt before. Drunk on it, I'd have her eat my ass. Not to make out with me. Not to hold my hand. Not even to suck my balls. But to french kiss my asshole while a better set of fuckholes milked her man's cock. Treated like some worthless asswipe. Yesterday's girlfriend. Today's filthy, ass-eating cunt.
More often than not, she'd walk in on us. Slowly finding more of my coworker's underwear thrown across the place for her to clean up. She'd walk in on the bedroom, nervously at first before growing in confidence. With the acceptance that this was what she wanted her sex life to be. By my side while I fucked all the hot chicks she pointed out. Rubbing herself senseless anytime she thought too hard about the consequences of her actions.