What would you suggest my response be if W asks, why I have not been trying or putting effort in saving the M.
Basically...I was not going to be in an open relationship where my W was disrespecting me?... is that too harsh. This conversation can go two ways; and I just want to get some advice if she starts asking me questions.
I would just say "W, I know what I really need to work on is myself, not the M. So that's where I'm placing my focus. I know that you don't want the M anymore, and I am respecting your wishes and not applying any pressure to you on that."