What happened to Mary while she was out at the bar with Pete during her school vacation?

While out at the bar playing pool with Pete during her school vacation, Mary was approached by a very drunk man who seemed interested in her. The drunk man challenged Pete to a game of pool and promptly lost all his money. Enraged, the drunk man swung a pool stick at Pete's head and was promptly beaten to the ground by Pete. Mary knew in this moment that her relationship with her father would never be the same, and that she wasn't a little girl anymore who constantly needed her father's protection.