The Quickie, James Patterson and Michael Ledwidge

When she sees her husband with another woman, Lauren Stillwell's heart nearly stops beating. Their marriage is perfect, she has a great job, she loves her life. But his betrayal turns her into someone she never imagined she could be - a woman lusting for revenge. "It was supposed to be a quickie, a way to even the score. But Lauren's night of passion takes a shocking turn when she witnesses an unexpected, unbelievable, deadly crime. Her horrifying secret threatens to tear her life apart, pitting her need to uncover the truth against her fear that the truth may be too horrible to bear. And whichever choice she makes could cost her dearly - her job, her marriage, even her life."