This case is very interesting, it made me think on certain aspects of marriage. I agree that each human being only can change himself, that is a certainty, but changing others is not always effective.
Mentally and physically we are changing with time, the man she married years ago is not the same, neither is she. I believe that marriage should be seen as a continuous negotiation: "I change this from me, but you have to do this".
If the parts don't agree, it is good that they take some time, if in the negotiation both parts are not willing to make their sacrifice, better leave it at that. Both seem to be very strong in their positions, they do not want to give in, so they have time to rethink their pact or finish everything.