My dad's wife left when she couldn't take care of him and his dementia. He has some things like a postcard and photo of her. At first he was always asking about her. I kept telling him she was with her daughter to be taken care of like how I'm taking care of him. He hasn't asked in a while, but I see him every few days with those items as he talks to himself. Would it be best to take them away so he can forget her since it makes him miss her, or is it better to let him keep them?