It still takes two. If she's not working on it and he's reached a personal boundry (giving something she withheld from him to a stranger and lying about it) then the decision is all his.
No one celebrates that he's reached the end of the rope. I would like to see his wife's response to being given a new chance but I think he's done that and she's not interested.
Choc, Have you done everything? Is she done? Has she had a sudden change of heart? Is she willing to do absolutely whatever it takes to rebuild (counseling, etc.)? I think I know what the answers are, but perhaps Cobra needs to hear the current state.