The Capo by Gleen Black

Dominic Cavalli a unscrupulous man, intense like a god, unpredictable and wears a suit as a philanthropist. Pretending to be perfect in the world eyes. His hands are stained with blood and full of terrifying secrets. It’s a bloodthirsty monster. Everyone fears him and no one absolutely denies him anything.
Emilie is – apparently – one more editor in New York. She has a peaceful world, an excellent best friend, an unmatched relationship with her coworkers, and a brother with whom she maintains distance. His life is perfect.
Was perfect… Forced into a dead end marriage, Emilie Greystone belod to the most ruthless Capo in history.