My Mum lives with us, she is 95 and has dementia, she keeps asking me where her mother is, well she has been dead for 50 years, she also asks after her sisters who have also passed away, when I tell her that they have died she wants to know why she isn't dead. She hasn't got a clue who I am, she is quite surprised when I tell her that I am her daughter as though she doesn't even know that she has one, I think she thinks that I am one of her sisters as she asks me questions about years ago which i don't know the answers to.