Habit,
My wife is similiar except that she moved out. Let give you a perspective from my own MLC that may help or not.
During my MLC it was all I could do to make it through the day. If I said hello or good morning I don't remember. I was in such a fog I know there was approx 6 months to 1 year that I had no recollection of. You say she fake. Yea when your in the middle of it just breathing is difficult. Is he doing the best she can? maybe. I only tell you from personally going through it is painful and just waking up is a stretch. if you have any questions I will try to answer but it is a period in my life that I would rather forget.