Thanks for the advice. And for all those who have posted in the forums. I really appreciate the way of looking at the situation.
I pulled back from the direction I was headed and have attempted to adopt a less attached interaction style with her. I have had some matter-of-fact conversations with her. She was very surprised by the change, and after leaving her alone for a bit she tells me she is considering staying.
I know that is just a beginning, but it is very encouraging.