Three's a Crowd (The Sullivans of Montana #4)
Cheryl Barton

Deputy Sheriff McKenna Gibson needed a fresh start in a new city. Escaping a life that was crafted for her had become old and dull. Sizzling, spicy encounters with Bozeman’s most eligible bachelor was exactly what she needed to help her forget the secrets she was hoping to leave behind in her old life as a military wife.
Without warning, Shelton found himself swept up into McKenna’s amorous sensualities that very much matched his own dalliances. Their steamy, seductive encounters led to even more explicit and erotic romps until Shelton’s world crashed down like a Montana boulder. McKenna is injured in the line of duty and his world is rocked off of its axis when her military husband blew up the love he thought was blossoming from the one time he decided to let down his guard.
Is Shelton willing to forgive and forget and turn away from the red hot stirring in his chest at the thought of her?