Sam: Mommy, will you please go to your bedroom? Clara and I need some privacy.
Me: Sure, I can leave the room.
Sam: And close the door.
Me: No, I need to leave the door open so I can keep an eye on Clara.
Sam: But I will be in here with Clara. I can keep an eye on her.
(This is coming from the boy who seconds earlier tried to put a boat on her head because it "looked like Mount Ararat".)
Needless to say the door is open (and the toilet is making a nice mountain).