Fairest of All by A.D. Ellis

Zane DeWitt is the poster child for traumatic pasts. He’s also the epitome of selflessness, resilience, and determination. Now that he’s finally away from the ones who hurt him, it’s time to reclaim his family’s good name. And seek revenge, of course.
Holter Todd would rather forget everything that brought him to this point in life. He doesn’t need friends or family. He’s good at what he does. If a few of his jobs take him across the line of morality, so be it.
Holter is hired to kill Zane, but he quickly switches his focus to the most deserving target. What happens next leads the two men on a twisting path toward healing and retribution. With the help of their found family, they find their happily ever after along the way.