How do you deal with parents who expect care because "you're my daughter"?

Ah, the adult/child dynamics when it comes to dealing with elderly parents. If a grown child lives at home helping their parent, eventually the dynamic goes back to the parent being the parent, and the child being the child. We are the "kid", and what do we know ??

Even though I didn't live in the same house as my parents, I felt they were still under the impression that I was still in my 20's or 30's and could still do everything..... hello, I was a senior citizen myself with my own age decline issues. Even waving my Medicare card and AARP membership didn't seem to phase them :P

This was before I knew it was ok to set boundaries, to learn to say "no" to my parents.

"Because you're my daughter"... sounds manipulative... (But that's my experience and without a doubt my mother "groomed" me to be her "caretaker" at my great expense, personally, emotionally and physically). What do you think he/she means? Is this new behavior for this parent or have they always had a selfish, or self-centered personality? How old is this parent and how is their health?