My grandpa is in his 70's and able bodied- his wife had foot surgery, can't get around well and is losing her memory. She is very 'dependent' on him physically and emotionally and yells at him a lot. He told me today he is burned out. How can he talk to her about taking some 'time away' to recharge his batteries, without insulting the fact that they are married, etc. He'd like to go fishing for a couple days. Any tips I can share with him to breech a difficult conversation with her?