Can I ask you in what capacity you "work with" her? Are you a trained psychologist or therapist? Or do you mean you are her work colleague?
Did you know - in spite of your thousands of hours of research - there is no such thing as a "disassociative disorder"?
You speak of her as some poor wee thing that in need of your ministrations. If anyone ever condescended to me in such a manner I would intentionally vomit on them.