Married to the Mafia by Rose Wulf

As far as Brandi Richardson was concerned, ‘family’ was a four-letter word. All hers had ever done was hurt her. So when her father sent her to work for Mikey De Salvo as a mole, she accepted the better-paying job—but not the rest. Her refusal to play his game meant she would be paying the consequence of his disappointment sooner than later.
At first, she was sure that was the explanation behind her new and highly dedicated stalker … but she was wrong.
When her stalker stepped up his game, leaving her bleeding and beaten on her bedroom floor, Brandi realized she had little choice but to run before he came back for round two.
Mikey De Salvo was a busy man. Operating a multi-faceted security company and maintaining the digital backbone of a mafia empire was not for the weak, or the easily overwhelmed. The last thing he needed was one more distraction—even if she was as brilliant as she was beautiful. So he kept his suspicious, yet undeniably gifted employee at arm’s length and under watchful eye.
When she showed up covered in bruises, visibly terrified and planning to run, he knew he couldn’t let her.
So he made her a counter-offer. Marriage, and all the protection and power that came with the De Salvo name.