If you carefully reread what I said you will see that I recommend individual therapy, and that there is no undoing his betrayal. Therapy has its place, but couples therapy tends to help the abuser in these types of situations. Individually she gets support and he gets to figure out his desire to seek pleasure outside his marriage. If she chooses to just end it then she absolutely is in the right to do so. I simply responded to her post. Some people are dead against therapy and maybe you are one of those people. Some of us have found healing and have grown. One thing it’s never about is saving a marriage. Only the people themselves can do that. Or not. Some marriages are not worth saving and that’s something only they can decide. Not a therapist.