My 86 year old mother has dementia and often goes down memory lane, waaaaay back to the 1930's and 40's. Both of her parents died before she was six years old and she and her two siblings (both now deceased) were raised by an aunt. Mom often talks about all of her relatives who have passed away. She sort of goes to another place in her mind when talking about them and will talk about them for hours if we let her. We don't want to be disrespectful nor uncaring, but we just can't sit and listen to the stories over and over again. She'll even sometimes start crying while talking about her deceased relatives. Is it okay to just get up and walk away? Any suggestions would be appreciated.