Babysitting?

Tonight I am babysitting. Or should I say "small child" sitting. Or infact probably not even sitting at all. I am hanging out with my bosses daughter this evening while him and his wife go into the big city to see a play that my coworker and I got him tickets for christmas. They are going out to dinner as well, so my duties begin at 4:30pm.
Did I mention that she is 7 years old going on 16.....So full of energy and probably has just about one of anything and everything that you could imagine at that age.

I haven't watched kids in about 7 years. I don't have kids of my own, and spend my evenings interacting with my husband and 4 legged kids. I don't know what to do with a 7 year old.

I am nervous. I don't want to break the rules and be the cool babysitter, because this is my bosses kid. My employment is important to me. But if I am not cool, then she is going to tell her parents that I suck.

You can't win sometimes. So please wish me luck. I will be hanging out with a 7 year old. Hopefully we both survive, don't burn the house down and I still have a job tomorrow.

I do know a few things that are no no's....No tattoo's, piercing, cussing, and I probably shouldn't break out a bottle of wine and get drunk while hanging out.
Would it be weird if I fell asleep on the couch after she went to bed, and I just spent the night there. Waking up in my bosses house might make work on a Thursday morning a little awkward :)