Nick I get my share of a similar thing daily Mums in a home with 2 kinds of Alzheimers so they cannot treat each of them with tablets as the tablets clash . Most of the elderly have it in different stages so I can be squealed at shrieked at out of the blue or just needed for comfort off anyone one old dear who is far away yet she always remembers my name and speaks so I put myself out for her . Men seem to clam up its the women that get nasty or violent. I have to dig deep inside myself and ignor it . I dont want that its not fair on your children dad had violent Alzheimers and hit mam only once but he did not know what he was doing . I use TM to shake off the stress mam loads onto me.