curfew pumpkin
A person who sneaks out to dance parties, raves, concerts and other such social events without his or her parents’ permission and must return before a certain time or before the parents notice that their child is gone. Much like how Cinderella had to return home unnoticed before the stroke of midnight and the carriage returned to being a pumpkin, people who are curfew pumpkins must slip in and out of their house without being detected.
She left the party in a hurry without explaining so she might be a curfew pumpkin