Rancher's Secret Child by Brenda Minton

Can he cowboy up for fatherhood? He had no room for love...until now.

After meeting the son he never knew he had, Marcus Palermo's simple life turns upside down. Complicating things further is Lissa Hart, the boy's lovely guardian. She'll help him become a parent–but falling for a gruff cowboy is not in her plans. Will she realize her future lies in Bluebonnet Springs with the rugged rancher?