My brother who is now in his 60s himself lives in a different county to my mother. He has mental health issues and lives in supported housing. He phones my mum sometimes and this causes her to get very aggressive. She says he does nothing for her. I don't know if it's dementia or denial that he has mental health issues as she is of an age where stigma was attached to it. When I remind her of his condition (and the fact he struggles to care for himself) she says she didn't know, no one told her, even though she used to visit him in a mental health hospital after suicide attempts. I even remember sitting with her within the last 5 years talking about his condition on the rare occasion he visited (She doesn't like him to visit). I have a brother in Canada that can't do anything for her by nature of the distance. He was very successful in life. She has no problem with his lack of assistance. I have this conversation with her regularly about my ill brother regularly. Her saying she didnt know etc. The extent of her dislike for him is difficult to listen to. He moved away and she hasnt figured in his life massively for 20 odd years as she found if diffuclt to see him in sheltered housing and doesn't like him to visit. Is this just her nature and how she feels about him, or is it dementia?