Affair Turn On

My wife had affair number of years ago it hurt me and we split up but few years later we got back together. The hurt of the affair had healed, but i still had times where it played on my mind. Sometimes it turned me on thinking of it and id play with myself thinking of what they did. I opened up to my wife about it, and we talked about things.. She told me about her sexual times with him. I told her it hurt me but also that it turned me on. One night during sex she called out his name, and i got into it. I start fucking her from behind while she was telling me how it felt having his cock inside her. Telling "him" to cum was amazing!