Question about Charlotte and her father...

Several times throughout the movie the father character refers to Charlotte as "a very difficult case" are we supposed to infer from this that she is also one of his patients? In the first scene with her in it she comes out of the exam room looking somewhat disheveled and screaming at her father. Her blouse is also unbuttoned, if I remember right, although there are a few other scenes where she is seen in the same state so this could just be to show how different she is compared to everybody else. Did anybody else wonder the same thing?

It seems odd that her father would refer to her as "a difficult case" unless he was treating her.