Kaeloo catches both Mr. Cat and Quack Quack in the act of looking at inappropriate pictures of girls. She sets Mr. Cat on fire while Quack Quack gets off scot-free. Flash-forward to season 2; Kaeloo's behavior when she sees Pretty near Mr. Cat makes it clear she has Clingy Jealous Girl tendencies; she was probably jealous at the thought of her crush being attracted to another girl.