Vdad,
I am with you in this pain. As I understand the situation your W is both frustrated with your M and she might have a MLC. This means that she might need some time alone. One thing you may consider is to offer her a separation instead of D, and suggest her that you can move yourself out of your house for a year. Explain that you would not like her to jump into decisions, so she will have a time to think what she would like to do. For you this will give an option to use 180 strategy and continue working on you marriage.