Swept Away by Robyn Carr

Runaway Mistress is a 2005 contemporary romance novel by Robyn Carr about Jennifer Chaise, who flees Las Vegas after finding her wealthy boyfriend's wife dead in their hotel suite, fearing for her own life. She creates a new identity as a waitress in a small town, finds unexpected happiness in a simpler life, and falls for a local cop, Alex Nichols, but must confront her past when her old life catches up to her.