Just roll with it?
My girlfriend and I have always been pretty open with each other sexually speaking. One night, I confessed to her that I used to let my ex sleep with whoever she wanted. As long as I knew. Sometimes I would watch, other times I would listen from the other room, and other times I wouldn't even be there, and just let her tell me all the juicy details. I asked her if that might be something she would be interested in, and she said it sounds hot but not something that she would be comfortable with. I was disappointed, but understood. Then, a couple months later, I came home early from a round of golf after deciding to only play the front nine, and one of our friends truck was parked in the driveway. I thought well that's cool maybe he was in the area and stopped by to hang out for a little while. When I went in the living room and kitchen were empty. I can faintly hear sounds from the back bedroom. I knew exactly what was going on! I crept down the hall and secretly watched my girlfriend fuck our friend. When they were done and as they were getting dressed I snuck back out of the house and drove around for 20 minutes or so. When I got back home our friend was gone. This was a week and a half ago. I still haven't told my girlfriend that I saw and enjoyed seeing her being used by another man. I've even masturbated several times thinking about it. Should I tell her and see if we can set something up like this more often, or schedule phantom rounds of golf in order to come home and see if she continues fucking other men? Either way, I find it super hot and would be happy. What do you guys think?