Wow. That's so unbelievably inappropriate, I'm shocked. If she contacts you again, I think you should send her a cease and desist letter.

At first it sounded like she just wasn't that skilled or sensitive, but the letter she sent you is disturbing both because she should not contact you after you've said you were terminating and because of the way she is so aggressively pushing her agenda. "Abandoning yourself?" Really? WTF? Who does she think she is?

I would report it to her professional licensing body. I think it's a major violation.