Married but both want to experiment sexually

39M married to a 36F. Living in the bay area. A little background we discussed having a threesome. She said the only way it would happen is if it was ma and another guy. After thinking about it in depth I opened up to the idea. It is new to me. But works me up when thinking about it. I am more attracted to women. I have never looked at a guy and said he is hot. I have vibed with a guy and thought it would work. When my wife travela I get worked up by her flirting/trying to hook up with other guys. It makes me hot thinking about her hooking up with guys or more us hooking up with another guy. I feel like it would work better if the first time was just me and another guy. Because I have never been with or done anything with a guy. We have both set our boundaries and know what we can and can't do. Any advice on this would be great. Feel free to DM.