In an effort to get us all out the door fast one morning a couple weeks ago, I threw my 6YO and 4YO in the shower with me.
6YO: Hey, don't touch my butt!
QS: Sweetie, I'm sure your sister didn't mean too. There's not a lot of room in a shower with three people.
6YO: I know she did it on purpose.
QS: How do you know?
6YO: Because! She grabbed it.
It was very hard to keep a straight face while my 4YO looked at me sly-like.