Today's sisterly exchange could be read to suggest many things. At a minimum, it portends the return of Jane's recently-dormant violent tendencies:
Margot (to Jane): "Kit Kittredge is a superhero. She is flying to give a punch to the evildoer, Jane."
Jane: "Jane has a cat that will hit Kit. And a pig, a strong one. One that can break Kit and get her to howl."
Margot: "Kit has a special platypus in a tank." [Apparently, the platypus is some sort of protective creature.]
Claire (annoyed): "That's a duck."
Margot (unperturbed): "It's a duckapus."