I have a constant fantasy about catching my wife having sex with another man. About three years ago, she confessed to have two affairs in response to my own infidelities. I made her give me every little detail, and then I would have passionate sex thinking about what a slut she's been. I think she knows how much her "story" turns me on, but when I suggest she do it again, she angrily declines. I know it probably isn't healthy for out relationship, but man does it turn me on.