Welcome aboard. You need to get Michele's Divorce Remedy book so you will understand the principles taught here.
Are the accusations your W made true about you?
What has happened the past four (or less) months that would cause her to suddenly put the stop to a MR with you? Why would she decide that she wants to be free right now?
Does she have new friends, hang out at different places, have a new coworker or boss? Did you not have a clue up until she told you she wanted out?
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!