Seth and Priscilla (The Cowboy and the Angel)
by Lietha Wards
This is the second book in the "Angel and the Cowboy" series.
Priscilla was a selfish spoiled socialite who had her sights set on the rich and successful Seth Harrison. The problem was, everyone knew she was crazy about him, except Seth. Of course he always treated her with the courtesy and respect that he treated women, but nothing beyond that.