Most Helpful Girl
She probably misses being carefree and not having a big responsibility like she does now. So yes, that would mean to be social, sleep in, stay up late, drink, dress down, and not worry so much about what others think. Don't always think that "cheating" is in the picture because believe it or not, single women aren't all dogs out there who just want to fuck everything. If you were to ask me what my "being bad" days were like, it was going to a lot of rock concerts, staying up late at bars, having drinks, and telling my boss off the next day, not entirely worried about getting fired. Men may or may not have been in the picture.
Sounds like she's getting bogged down with life and responsibilities and just wishes she was carefree again sometimes. You should treat her to a weekend getaway to free her of all the work she's doing. :)