An Inconvenient Wife by Karen E. Olson

Kate Parker knows what she's getting into when she marries billionaire businessman Hank Tudor-she's his sixth wife, after all, and was by his side (as his assistant) when his fifth marriage to actress Caitlyn Howard fell apart. But honeymoon plans go awry when a headless body is discovered near Hank's summer home, forcing Kate to contend with two more of his exes: Catherine Alvarez-the first-who lives as a shut-in with her computers, carefully following Tudor Enterprises; and Anna Klein-the fourth-who runs a bed-and-breakfast where she and her wife keep a steady eye on things-particularly Hank's children, Lizzie and Teddy. In this clever and suspenseful reimagining of Tudor-era betrayals, these three women become entwined in a deadly game of cat and mouse-with each other, Hank, and Hank's brilliant fixer, Tom Cromwell-as Kate seeks to solve the puzzle of who the murdered woman is, who killed her, and whether her death has any connection to the other headless body from eight years ago.