Hard Knox by Delilah Devlin

After relentlessly pursuing the biggest badass around and failing, Dead Horse, Montana’s wild child offers him an irresistible proposition—one night of passion, one and done, and she’ll walk away forever…
Dead Horse, Montana’s wild child, Carleen Crossley, knows what she wants—or rather—who. She’s spent years chasing after Knox Ramsey, the biggest badass in Dead Horse, MT. However, she’s resigned herself to the fact that her methods of gaining his affection aren’t reaping any rewards. Yes, her antics keep the townsfolk amused, and Knox definitely knows she’s alive, but she has yet to break through his cold, hard heart to claim her man.
For Knox, Carleen is impossible to ignore. She’s everywhere he is. The sexy vixen has made him uncomfortably aware that she’s his for the taking, and Lord knows he’s tempted. However, he knows he’s not the man for her. He’s his father’s son with his father’s temper, and he won’t succumb to Carleen’s charms because she deserves better than him.
In one moment of frustration over his refusal to really see her and everything she’s offering, Carleen proposes a deal Knox finds impossible to resist. One night of passion—one and done—and she’ll never bother him again.

When she keeps her promise afterward, Knox’s pursuit begins because once was not enough.