Tempt Me Twice by Jody A. Kessler

Armed with her favorite beaver underwear, a new job, and endless optimism, forest ranger Tawny Brooks is starting over in the small town of Three Peaks.
During her move to Colorado, a hot and irresistible cowboy makes an offer she can’t refuse.
After an outrageous one-night stand, Tawny vows to never see Jeremiah again—and she’s determined to leave her bad decisions in the past once and for all.
But when she arrives in town and they’re forced to work together, Tawny discovers that Jeremiah isn’t going away any time soon.
Rancher and playboy Jeremiah Erickson doesn’t believe in love or happily ever afters. He’s content with his bachelor lifestyle and too busy recovering his losses after the Forest Service revokes his grazing permits to get involved with Tawny.
So why is the funny and wildly unpredictable forest ranger everything Jeremiah never thought he wanted?