"Not a Good Choice"

Here's the conversation I just overheard and what I found when I went to see what was going on.

Owen in his lecturing voice:  "Mommy is going to be mad at you."
Claire, ever so happily: "Yeah!"
Owen:  "Mommy is going to be really mad."
Claire: "Yeah!:
Owen, slightly panicky now: "Claire, you have to stop it!  You are not allowed to do that!"
Claire turning serious: "Not a good choice, Owen?  NOT a good choice!"

Definitely not a good choice.