A Silver Lining by Beth D. Carter

When Heather Hart was a young girl, she met cowboy Tristan Roger and promptly lost her heart to the young rodeo clown. Twenty years later, Heather has been summoned by her dying grandfather to determine if she is worthy, being the last of the Harts, to inherit the family ranch.
Only the man she’ll be competing against is none other than Tristan Rogers. She has one month to learn five things about the ranch and Tristan is given the task of “showing her the ropes”, so to speak. Heather recognizes her adversity and uses all the weapons in her arsenal to fight for the Hart Ranch, namely sex appeal and attitude aplenty.
But Tristan can’t help but remember the young girl who had been more innocent and shy than this hellcat in high heels. As he tries to figure out what embittered her, Heather must transform into a woman worthy not only of her grandfather’s approval, but her own.