Oh, she didn't walk to the store, it was her friend that did. When they left to go find them, they found them outside the house.

It turns out she didn't entirely enjoy the party. She loves friends and lots of people around her and talks louder and faster than anyone there. She was all I could hear from inside. But the best friend that arranged everything wouldn't help her clean up afterwards. And didn't see why there needed to be cleaning up the next day. (I did the cleaning up yesterday by myself!). So my stepdaughter is a bit disillusioned with her friend and I realize that she has absorbed some of my teachings by realizing that when there are lots of people over, messes can be made, and messes need to be cleaned.

Next year, for her 16th - I think I'll arrange a venue for any surprise birthday parties