Colton by Marriage (The Coltons of Montana, #1)

Susan Kelley remembers the long-ago teenage crush she had on rancher Duke Colton. Some things don't change—like Duke's sexy half smile and the way it leaves her breathless. What's different now is Susan's all grown up with very real desires....

Accustomed to minding his own business, Duke can't walk away when he spots Susan crying outside a hospital. Ever since that day, their paths keep crossing. They finally surrender to the scorching passion between them, and suddenly she's all he can think about. And when Susan begins receiving threats, Duke must do everything in his power to protect the woman he can't resist loving.