My girlfriend and I are into cheating voyeurism. So, she "cheats" on me and I watch or listen in secret but the guys that she fucks either don't know that she has my blessing to fuck them abd think that she is cheating or they don't know that I even exist and think that she is single.

At the start of November I asked my girlfriend to fulfill one of my fantasies which was to fuck my housemate. I knew that he was hung and that he is a player because our walls are quite thin and I can hear his "conquests" moaning his name. So, after a year of living woth him I really wanted to hear my girlfriend with him. I had already spent many a night listening to him banging a girl that he had brought back imagining that it was my Isabella.

So, I asked her to flirt with him and maybe fuck him. Shebstarted off subtle. Just touching his arm and changing her voice when she spoke to him. Just being a little flirtatious.

Soon I noticed him checking her out more and flirting with her. So, she ramped it up a bit by wearing tighter clothing when he was around or wandering into the kitchen when she was over in her underwear.

Then at the start of December he went on a night out and I told my girlfriend where he was going. Then, she went to the same place and they flirted some more and danced and eventually she kissed him and they started making out on the dance floor.

He thought that she was cheating. He brought her back to his room. And because the walls were so thin I could hear everything.

I could hear every moan, groan, spank, clap of cheeks and every word spoken. It was insanely hot. They went on throughout the night and then she left in the morning.

But anyway, since that night the dynamic in the house has changed. He has been a lot ruder to me. (He still doesn't know that I know). And he tries to be a lot more assertive over me and Isabella, whenever she is around.

He has been a lot more brazen when he continues to flirt with her. I pretend not to notice. He even carressed, squeezed and then spanked her ass when he thought that I wasn't looking. And Isabella lets him do this. And she enjoys it even. She still flirts with him but they haven't slept together since.

I have quite enjoyed this most of the time and is quite a big turn on.