TS, One more thing: I hate macho, posturing fellas. I have never dated one in my entire life.
That is not the type of person Blackfoot is talking about.
If I was married to a person who's first husband was macho and who carried on an affair for 12 years with a macho guy, you can BET I'd be wanting to find out exactly what the women here are referring to as "macho" and how I could get me some o that.
I think it is foolish to say "that's not me" and throw in the towel. The reality is that you are married to a woman who, for whatever reason (does it really matter?), finds assertive men attractive.
You may want to work on developing your macho side a bit and see what good things happen in your R.