Complex sentence: Lily asks how Robin could know Victoria when she wasn't at the wedding, and Robin tells her that she came late to the reception to surprise Ted, but she saw Ted and Victoria almost kissing, and went into the ladies' room to cry.
Split into simpler sentences: Lily asks how Robin could know Victoria when she wasn't at the wedding, and Robin tells her that she came late to the reception to surprise Ted. She saw Ted and Victoria almost kissing, and she went into the ladies' room to cry.