You knock on the door. Its a new babysitting gig. People warned about the kids but not told why. You think they are troublesome but nothing you can handle. The door opens up and its the parents:

Mr. Jones: You must be the new babysitter thank you for agreeing to watch Luke and Mary.

You: No problem. We will have fun

Mrs: Jones: Im sure you have been warned about them

You: Nothing I cant handle. How hard can they be?

Mr: The thing is, what you werent told is that

(what do they tell you?)