Something to think about. Do you want this M back right now or do you want your M back forever?
If you want it forever you really need to somewhat dig your heels in the sand with her and stop letting her dictate how this is going to go. You want a new, non-cheating version of your W, who puts in effort and works with you to make a better M. Who you have now is not going to put in the work because you are making it too easy.
