Having computer problems and can't type but a few sentences when it starts messing up!
Anyway, I think it may come to the point that he will have to make a serious decision to choose between his family and their family. You said you felt that if you showed any jealousy, etc. that it made you look like a b*tch, but I see you as a woman fighting for her M. I'm sure that OW & her H have lots of problems and you feel sorry for her and her H is a jerk and all of that......but do you feel bad enough to just lay back and allow this all to happen right before your eyes? That is what is going down.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!