I think the question here is how does this tie in with the fact that you have not paid her for four months.

It seems even more complex than usual because of that fact.

Do you feel obligated to take it so that you can be more self-sufficient and maybe pay for some of your therapy?

Do you feel obligated to take it so she won't blame you for not making enough progress again or to keep her from resenting you if you turn it down and still can't pay her?

Is she doing it because she needs a PA and you're qualified, or to work with you as a favor or because she's fond of you?

Considering she's so important to you, how would it be to have her importance in your life increase even more as she would be your employer?

Just raises so many questions for me.

What are you thinking about it?

I don't believe it's necessarily a 100% "no" - but.... definitely complicated.