Flirting With Married Guy

So, I'm married of 13 years and have been very open with my wife regarding what does and does not turn me on. Early in our marriage I had told her that I was bisexual and enjoyed having sex with men. She replied that that was something that turned her on and would love to sometime witness me with a man. Fast forward a few years and a buddy of mine comes over and we try to get something going but to my disappointment, the guy was really lacking in the power department and I really lost a lot of interest. Recently I have been flirting with a former coworker of mine and told him that I was crushing hard core on him and to my surprise he said he was interested also. I guess I'm just hoping for a great time. We shared pics and he's got an absolute gorgeous bottom. He said he's not had a partner in several years but would be willing to play. My question is, as a gay man would you let a woman watch you have sex with her husband? Is that a turn on? The thought drives me wild. What are your thoughts?