She accuses my dad of telling everyone she's crazy. He's told me for quite some time that something was wrong with her, but now it's clear she has dementia. I don't know if anyone has told her that. I don't want to intrude on my stepsisters' space, but it's getting ridiculous. When I visit, I don't know how to handle her constantly repeating questions and accusing my dad of things. He is just getting better physically, and it's taking a toll on him. I feel so sorry for both of them. I can stand it for my short visits, but my dad is with her 24/7, so I can understand his frustration and anger.