I have been a caregiver for my grandfather for 4 years. In the last year his sister moved in and I have been taking care of her too. My grandfather, her brother, passed this march. I've tried telling her that he died but she just forgets and then asks again the next day. It's very hard on both myself and her to just keep explaining what happened. During the day when she asks I can just tell her that he's at the senior center. But she most frequently asks at night, when he was usually sitting in his chair. What are some things I can tell her other than that he died?