What is a short summary of the story, I Will Survive, from the collection, Table For Two?

The story, I Will Survive, revolves around a woman named Nell, whose mother, Peggy, confides in her that she believes Nell's stepfather, John, is cheating on her. Although Nell's boyfriend, Jeremy, urges her not to dig into her mother's affairs, Nell follows John through New York City and discovers that he is not cheating at all, but has instead been participating in recreational roller skating performance, which seems to bring him a great deal of joy. After an elated Nell relays this information to Peggy, it destroys Peggy and John's relationship, prompting Nell and Jeremy to gradually understand that in a sense the pleasure John has taken from the roller skating is as much a violation of the relationship to Peggy as a romantic tryst would be.