My mom has early stage dementia. She moved in with us in June. My husband and I talked to the kids about her not being the same grandmother they remember. Now that she has settled in, they have become short tempered and rude. My 10 year old fights with her like another 10 year old. My daughter knows that "Oma" has issues and tries to tell her what to do. My mom, believing she is a perfectly capable adult, gets mad, and the fight begins. Any advice?