A cowboy discovers he's a father and falls for his secret baby's beautiful guardian in this romance from a USA Today–bestselling author. Nothing shocks horse trainer Finn Calhoun more than learning he's the father of a four-month-old boy! And when the tall, dark, spur-jangling cowboy arrives in Stallion Canyon to meet his baby, Mariah Montgomery has her doubts about his motives. Until a DNA test is done, she insists Finn stay at her ranch—where she can keep an eye on him. Contrary to his image, Finn is only too happy to oblige Mariah—and help to revitalize her own failing ranch and work with her wild mustangs. As his love for her nephew grows, their mutual passions reach new heights, too. But when Finn finally proposes, is he just looking to secure the ranch—for himself? Or can Mariah trust that he truly wants to build a family with her and baby Harry?