How do I deal with my Dad asking about money. He is in a nursing home and is settled but still harbours a desire that one day he will live in a house with my sister. He wants to see his bankbook but I am worried that he will be upset if he realises how much he is paying per month. He suffers from dementia but at times he is more lucid than others.I don't like lying but the truth isn't always acceptable. What should I do?