Most Eligible Sheriff by Cathy McDavid

A Reason To Stay 

Las Vegas casino manager Ruby McPhee needs to lay low while the police deal with a stalker at work. So she's trading in her high heels for cowboy boots and assuming her twin sister's identity at the Gold Nugget Ranch. Ruby only plans on staying in Sweetheart, Nevada, until the threat back home has passed. But then she discovers a detail her sister forgot to mention–the handsome sheriff she's dating. 

It only takes a single kiss for Cliff Dempsey to realize the woman in his arms is someone entirely different…and completely irresistible. To protect Ruby's secret, Cliff maintains her ruse, but soon the lines between duty and desire begin to blur. Ruby and Cliff know they have a once–in–a–lifetime connection, but will they have a chance to let their love grow?