The Woman with the Target on Her Back

The mafia owed her a favor.
One she never meant to cash in on.
Until one night, she found herself needing help, and desperate enough to call the last man in the world she ever wanted to have to rely on. A man who she couldn't seem to have a single civil conversation with.
But for better or worse, she needed him to keep her safe.
If they didn't kill each other in the process...