My mum is 87 and my dad is 93. They are both healthy relative to their ages. My mum has high blood pressure and my dad gets weaker and tireder with age but this is to be expected. They live independently and are also snowbirds and although there is some memory loss no dementia that we are aware of. The problem is that my mother is enraged with my father 24/7. It doesn't matter what he does she is in full anger towards him all the time. It drives her blood pressure up and I can't imagine the toll it takes on dad. He is very forgiving of her and most of the time he takes it. My sister and I are in a constant state of angst as it is extremely difficult to watch and talking to her doesn't seem to have any effect whatsoever. It can be so bad that we are concerned she may cause him or her to have a heart attack at some point or that she will totally loose it and start in with physical abuse. I can't find anything on this topic in my research. Has anyone else had to deal with this issue?