Penelope Wicket believes that people should follow the rules. Rules are what keeps society running smoothly and correctly. She'll do whatever it takes to make sure that others follow the rules or are punished accordingly - even if this means that she has to bend or break a few rules herself.
Mrs. Wicket is the sociopath next door that you hope to never cross.
In this tale, Penelope Wicket has finally gone past dealing out punishment for rules violations and is acting now merely in her own best interests. But she forgets, other people may be doing the same.