My wife has always had a fantasy of having a MFM 3some. Back when we started dating I said no way but now I'm open to the idea. The only thing is whenever I try to guide a chat to that topic to try and say I'm ok with the idea now she says things like "I know you wouldn't wanna see me sucking another guy's dick." Truth be told, I would! But after she says things like that I can't just say "Hey hun I want you to suck another guy and I wanna watch while I fuck you."
Any ideas on how to bring this up without getting shut down every time?