I know that tonight will be hard for you, but remember that it is so important that your W see you being strong, okay? Go outside, in the bathroom or leave if you think you are going to break down. Don't try to talk her out of leaving b/c it will lead to more R talk, and get bad.
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!