Treachery by Eve Black

Nadia
After a series of life-changing losses, Nadia is shocked when life hands her a big win. But with that comes the realization that people will lie and cheat just to get a piece of her. Fighting to not let life keep her down, Nadia is surprised when sexy bad boy Locust edges his way into her life, her bed, and her heart.
And then he breaks it.

Locust
Legend, lover…liar, Locust doesn’t care what he has to do to get the job done, and when he’s ordered to get close to the sister of a traitor, he rides in, ready to seduce and deceive. What he doesn’t count on is falling hard and fast for sweet Nadia.
But when Locust’s treachery is discovered and his plans crumble, he realizes that blindly following orders lost him everything he ever wanted. Determined to win back the woman he loves, he will once again do whatever it takes to get the job done—even a little light stalking.