I think it's possible that believing she is uniquely valued and not readily replacable might go some distance toward balancing those scales and motivating her toward the crow-eating and hard work necessary to back away from the precipice of divorce.
Yes, feeling replaceable sucks, I know.
This is so tricky...I don't want H taking for granted that I will move on but I also want him to feel that he's "the one" feeling...
Ultimately, they have to find their own truths. There is so much blatant insecurity, don't want to fuel it and don't want to be a sucker to it either.