Amy I'm not sure that moving back in is the best thing for him to do. I think it'd come across as forcefully as an ultimatum. Moving closer to home shows independence, a desire to be near his family but no so close he's watching/spying and trying to control them.
It'd be interesting to find out the real reasons for her wanting him to move out. Traveling for business is a rather lame excuse.
If we really want to love, we must learn how to forgive. - Mother Theresa