I Fuck A Mutual Friend Last Friday

Last Friday, I fucked a mutual friend that my wife and I have known since 1992. She’s divorced. Our mutual friend is visiting us at our vacation home. Last Friday, we were out with her during the day doing touristy stuff, came home, ate dinner and decided to watch a movie. My wife went to bed, leaving the two of us on the sofa in the family room. The movie had a couple sex scenes, which got us on the topic of sex and relationships. At one point she said to me, “I’ve always wondered why we never had sex?” I told her I was never attracted to her. I could tell by her reaction and the look on her face that my comment hurt her. But instead of getting up and going to bed, which is what I expected her to do, she got up and came over and sat next to me and started squeezing and rubbing my cock through my gym shorts. Once I was hard, I said, “let’s go to your room.” I have never so much as held her hand, much less kissed, fondled or fucked her, but there I was kissing and fucking her. It was wild. Not sure how this changes things. I’m hoping it was a one off thing, feeling pretty guilty right now. She leaves in a couple days and we haven’t spoken about what happened. She lives a couple hours from our primary residence where we live most of the year.