The Wicked by Karma Kingsley

Irina Teriscovski has just returned home as a new college graduate. Her life plan only includes getting the hell away from her family and all of their darkness. The family business has no place for her. But when she sees Khalil Bates again– the man who took her virginity–walking away seems easier said than done.
Khalil Bates has been like a son in the Teriscovski family. Felix Teriscovski took him in when his only family put him through horrors no child should have to see. He’s always been loyal to Felix and his family, no matter whose throat he had to slit to keep Felix’s business running. But when Irina Teriscovski returns home, even knowing how dangerous it would be to have her again, he just can’t seem to stop himself. The daughter of the most dangerous man alive could be his undoing.