What do girls do when they are home alone?

I mean what do they do when they are alone for 2-3 days.

Some of my chick friends have told me that they pretty much invite other girls to sleep over, but her friends don´t stay for more than one day. So after that they invite their best guy friend or they just stay alone. Can anyone help me out with this? I´m out of town for 2 weeks, my girlfriends parents are going to be out for one week and she doesn't have any brothers or sisters that will stay with her so I´m kinda interested.