Dirty Roxie by Denise Wells

ROXIE:
The biggest problem when you partner up with someone as sexy as Ronan Sinclair? You find yourself planning out all the ways to get him into your bed instead of focusing on work—our trek around the globe chasing the bad guy who did him wrong.
I’ve tried every seduction technique in the book, and still, he resists. What he doesn’t know is, I’ve got one more trick up my sleeve. When I bust that out, he’s not going to know what hit him.

RONAN:
I’m not a bad man, I just like to do bad things. But this time, I’m trying to be good because I want to do right by Roxie Stevens. I want to keep her safe. Mostly from me.
That means not giving into temptation, even if I do want her as mine. Because if I cave, one way or another, I’ll have to kill her when this is all over.