She's playing with your head. She doesn't want to save her M, she just wants you to be her friend. The minute you show some action without consulting with her....she's ready to turn the tables and make it sound as if you out to be the bad guy. She does not want to be your W! She just wants you to be nice to her while she sleeps with OM.
Having another conversation about it is not going to accomplish anything. She goes in circles until you don't know what to think. So, stop playing her game. Find your b@lls and let her go. That's the only thing that is going to pull her back. Don't tell her you are going to take back your b@lls.........just do it. If you were not M and this was a girlfriend who was sleeping with another man.......what would you do?
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!