Texas lawman Bo Duggan got the shock of his life when Mattie Collier showed up on his doorstep, claiming his daughter was really hers and not his son's twin. But before Bo could argue, Mattie became a gunman's target and duty compelled him to protect her. After getting the children to safety and then going on the run, Bo couldn't help but admire the way Mattie wouldn't back down--from a fight and from believing she was his baby's mother. Bo had trouble imagining a life without the little girl he'd given his heart to. And before long, he had to admit, he had trouble imagining living without her mother, too.