... I haven't gotten there yet. [She's too impulsive to have planned out her vengeance; she just knows that she wants it.]

All I know is that I want to be there when he gets his just desserts, and I want to have a hand in it. [There's righteous anger in there, of course, but there might also be a little...worry. Embarrassment. Humiliation. It may have been an unfair fight, but she still failed, even if she was able to leave a clue for those who were actually able to pursue him.]