A little over a year ago my wife and I attended a summer work party with my best friend and his wife who works with me. Late in the night, I went into the basement to grab some ice and heard sex sounds coming from the next room. I looked in and there was my friend's wife, hands on an end table, on her knees on a couch, her skirt pulled up over her back, naked form the waist down getting fucked hard from behind by some black guy I never saw before. He was about our age wearing nothing but a white T-shirt. He was railing her, one hand over her mouth to keep her from screaming. She was rocking her ass on his cock obviously lost in ecstasy. The guy saw me watching and smiled at me, slapped her bare ass and just kept fucking her smiling and nodding his head. He didn't seem to mind me watching and I couldn't take my eyes off the scene. I watched him fuck her and saw her orgasm a couple times before he finally shot his load into her.

I got out of there before she saw me.

We all left together. She was acting normal but looked worn out. She said she was really tired. Yea, I know why. I never said anything to anyone about it. They appear to be a very happily married couple and I don't want to disrupt that. I'm a little concerned though because we are all going to a Halloween party at the same residence tonight and I'm wondering how she's going to act. Especially if that same guy is there again.