I agree! Casey has always been able to manipulate the people around her in various ways in order to get her way. She is not in control anymore and it's getting to her. I think she is beginning to see the writing on the wall.
Casey also saw how many (?) young women walk into court with up to date hair styles, make up, nice clothes, they were well spoken, had decent jobs and good lives. She sits in a cell day after day. I think that got to her. She is used to being able to keep up with the competition so to speak and she could not even begin to try because of the constraints of her confinement. I'm not saying this to be snarky or to cut her down, but as an aspect of her personality and self esteem. The contrast was marked and vivid, at least to me.