@captainblue,
What do you want to hear, that she's guaranteed you sex and you should go for it?
All she's says she wants to do is stay over, along with a bunch of other people.
Maybe things will go further, a bunch of strangers on the internet won't know, but make sure they go at her pace. People who think they're promised/guaranteed sex often end up in court.
Take it easy, and have a good time.