King of Envy by Ana Huang

The fifth book in the deliciously steamy Kings of Sin series from #1 New York Times bestselling author Ana Huang, where bad boy billionaires must atone for their sins in order to earn their love stories.
He had everything he could've wanted. . . except her.
Dangerous. Powerful. Reclusive.
Vuk Markovic is notorious for shunning humaninteractions. The scarred billionaire rarely talks, and he has no interest in relationships outside his small but trusted circle.
His only exception? Her, The beauty to his beast, the object of his obsession.
He saw her first. He wanted her first. But now, she's engaged to his oldest friend - and the closer the wedding looms, the more he's torn between loyalty and desire.
She should be his. . .and he might just risk it allto have her.
***
Beautiful. Successful. Glamorous.
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.
Pretendingto 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.