You and your dad have made a good start. Him having PoA for your mum will certainly help with some things. But I would recommend that you also get PoA for him, at some stage, to ease your path in the future, too. Could you perhaps go with your dad to the GP? Perhaps he might open up more if you're in support there with him? Might be worth asking him if he'd like you to go, just in case. And the more he and you can learn about dementia, the more it will enable you both to cope. It's all about accepting - as far as is possible, and no one's saying it's easy! - that your mum has a very different perspective on life because of her illness from you two, and that trying to reason with her is simply unlikely to work. You have to try to work with her, so to speak, and not get frustrated and stressed when she doesn't cooperate or understand, otherwise you'll all get upset. Don't sweat the small stuff, as they say! And keep posting on here, of course. Everybody is on here to share problems, experiences, and support.