Been there, done that, with several in-laws who could be terribly frustrating to deal with. The apartment we built for my wife's parents before they both passed on is now occupied by her 83 year old brother. He's a non-compliant diabetic who eats candy and chips by the pound and has had several mini-strokes. It must run in the family- - - - -my wife is a chain smoker who also has COPD and struggles for every breath she takes. She can't (or maybe won't) even talk about quitting!
Jerry
