Scans_Daily

Confronting and defeating her father's killer somehow was her ultimate goal, it was the one thing she wanted but couldn't have that he was talking about. It's what was giving her fuel to become a psychiatrist and behave this way. Joker was going to be her step to this final victory. Hence, using him to defeat and understand the criminal psyche and then move on to final resolution with her father's killer. It's what got her there. When he took away what she was working towards, he crushed her. She realized she could not attain her power back and become like him, because he already took away the one thing that would give her that. All those years wasted.

As far as suddenly becoming some magical fairy godmother to assist and do what ever one wants, because you throw some caustic words at him. No. That does not sound like the Joker. He is striking her for that. He always has an ulterior motive. He is vicious. This is revenge.