What is this movie called?

My mom is trying to find a movie she says its called the babysitter. But we can't find it. The babysitter takes a boy and a girl in a car looking for someone, they end up where the parents are in a meeting, they hide from the parents, than go to the bus station to pick up a girl. They end up on a bus and the babysitter holds a knife and says don't *uck with the babysitter. And at the very end the little girl has a cap with wings on it and hands it to a guy with a hammer and says the man is Thor. She thinks one of the actresses name is Sue or has sue in her name. Thanks for your help.