Come Undone (Dark Knights in the City, #4)

Dean's wife was murdered, while leaving him to be with Forrester. Forrester decided it would be less hassle to kill her than keep a mistress. Dean has blamed the other man for ruining his life ever since, so when he finds the rest of the guys trying to wreak vengeance on Forrester, he's all in. Unfortunately, his talents are few and far between. He's good for brute force, and that's about it.

Emma is a bank teller, in the unfortunate position of catching Dean's eye during his first robbery. ...