Yep, I think that's it. It's 12:30 and she shows no sign of having been gang raped. She is trying to get back into the house for her shoe rather than calling 911 or running away screaming about the brutal attack.
An attack that had to have just happened a moment ago, since she only got to the house at ~11:50, and was dancing at 12:00 and on the floor, etc.
Yes, and of course she was in such a drunken stupor that the young men who raped her also had to dress her afterward, just out of the kindness of their hearts.