Filthy Secrets by Jonathan Butcher

Helena is bored with her marriage, her job, and her life, until one day she discovers a unique way to make things interesting again. As her taste for covert depravity becomes a dark obsession, Helena faces conflict: does she want a life of private perversion, or the love of her husband? Can she have both? In this splatterpunk love story, only one thing is clear: everyone has their secrets.