Shatter the Night, Steal His Heart

Claire Stone signed over the company shares she inherited from her mother to Victor Crane, her boyfriend from university. Victor then conspired with her father, her stepmother and her stepsister to kill her. After she died she learned that her mother had been killed by the same people, and that Ethan Kerr, a boss in the underworld, avenged her and took his own life afterward. That was when she understood how he had felt about her. Claire wakes up alive again, back before any of it. She goes straight to Ethan and tells him she will marry no one else. He does not believe the change in her. She marries him anyway and uses his influence to start on the people who destroyed her.