The Ranger's Nanny (Ranger Valley Ranch #4)
Lia Rae

Devlin "Tech" Wells went from army ranger to widower and single father in a single blow. He’s found a new home with his former team at Ranger Valley Ranch, but keeping his daughter out of trouble is difficulty until Harper Lentz walks into their lives.
With a past full of trauma and hurt, Harper revels in every peaceful day at Ranger Valley Ranch. She’s once again caring a child when she herself can’t have any, but that isn’t a problem until her feelings for her new boss who wants more kids get too big. And there's no way she can confess to him what she really wants.
They’ve both found a home and new family in the hills of Ranger Valley, but all of that is disrupted when the past won’t stay where it belongs and threatens to tear them apart not just emotionally, but physically too.