Having read the things said on this thread and going though it myself, I do agree that the best course is to have her think you're a friend and her carer. It does not matter what title you come under as long as she accepts that you are there to help and are not going away. Anything for a quiet life. My lovely piglet tells me she is so greatful for my help almost every night although sometimes I can see she wonders who I am and why i stay. ( she will ask won't my family wonder where I am but always accepts that i have told them )
It can be quite funny and enlighten to hear what tony ( thats me) has done and where he's been, and what she thinks of him/me. But as long as it's all good, that's fine. A few nights back she said that he/me was very kind but sometime gets cross but that's because he gets frustrated. So on some level she is aware even if its a bit mixed up, which is gratifing. Must go, The Kraken awakes.