Our balding youngsters are safely back at the window, watching the rain, when their mother walks in. Mother's face is hidden behind the door, so we never get a good look at her.
The first thing she asks them is pretty apropos: "Did you have any fun?" (296). She wants to know what they've been up to.
The Cat in the Hat (famously) ends with a dilemma. Sally and her brother don't know whether they should tell their mother about their crazy day or not. Hmmm.
Our young narrator ends his tale with a question, "Well.../ What would you do/ if your mother asked YOU?" (306)