SM tells the stories of two relationships where the men fall out of monogamy with much younger accolades. The story is narrated by Sharon Soleymani, a writer of popular novels. She and her husband, Al, a professor who is a decade older than she is, have young twin daughters and an easy life until their marriage is shaken first by his admission of an affair with a research assistant and then by her diagnosis of breast cancer. When Al first hears of the cancer, he heroically returns home to look after Sharon and his children. Ironicly Sharon married Al only after his first marriage was destroyed by his affair with her. When her treatment finished, Sharon begins to write a serialized novel about Charles Dickens’s affair with the actress Nelly Ternan, which began when Nelly was 18 and Dickens a married 45-year-old father of nine. Taylor balances the two stories well, alternating chapters. It is based on historic fact.