 Inadvertently, Aldous informs Peter that he and Sarah began having sex a full year before she broke up with Peter.When Peter confronts Sarah, she tells him she began feeling disconnected emotionally from him and she couldn't do anything to make their relationship work.Further exacerbating the situation is Sarah's obvious jealousy of the budding relationship between Peter and Rachel, while Peter (through observing Sarah's relationship with Aldous) begins to realize that his relationship with her wasn't as great as he remembered.