I think the problem is that you are thinking of this as a "final decision". There is no final decision. She wants a D right now. She may file. You may get divorced. But that still doesn't mean it's OVER. The point of this is not to get your W to stay - it's to make yourself into the person you want to be who is capable of having a successful marriage. Then, if it's with your current W, great. If not, you will still be a better person for the work you have put in.