"For now, I am done with Jeanne" - that seemed way to abrupt. It could be that she's neglecting the details on how she moved on. It seems more likely that it's just a temporary reprieve. She needs long term help, not just a hospital to patch her up.
Yeah, she will relapse. Sad. I'm glad that she is a good writer and that I got to read this moving story.
She would have had problems even if she was not named after her dead sister. Even if there was no dead sister. I hope she gets help.