My 96 year old mother was recently diagnosed with dementia. She lives with my sister and I visit every week. Mom knows who I am when I visit but after a few hours she starts talking to me as if I am her cousin. When I try to tell her I am her daughter, she doesn't believe me and says that I am trying to confuse her. If I go along with her and let her believe I am her cousin, she talks to me about things that happened when they were young and asks me questions that I can't answer. Then she becomes agitated that I don't remember these events from her past.