Omg Why Can't I Smack Kids?

I'm about ready to smash my head into a wall. Rosie's "best" friend is over for a sleepover and what a self centered bitch! She is being cruel to Ryan and I've had to tell her a few times that he is a part of rosie's family and therefore is allowed to play with them. She has tried to get into my filing cabinet to get paper, broken one of ryan's toys and hurt him once already and has only been here an hour. Grrr, I wish I liked this girl and I know she's only 5 but I have NEVER disliked a kid so freakin much. If she hurts Ryan once more I will walk her back to her house and tell her mom to keep her daughter the fuck away from Rosie.