King of Envy (King of Sin, 5) by Ana Huang
 
To the world, supermodel Ayana Kidane leads the perfect life. Her career has skyrocketed, and she's engaged to one of New York's most eligible bachelors.
What people don't know is that the engagement is only a business arrangement. He gets his inheritance when they marry; she gets the money she needs to leave her abusive agency.
Pretending to be in love should be easy―until she finds herself increasingly drawn to her fiancé's enigmatic best man.
Vuk thrills and terrifies her in equal measure. She knows she should stay away, but when her wedding is thrown into chaos, he's the only person who makes her feel safe…
Until his past catches up with them and threatens everything they love.