"Wedlocked!" is a multi-author book series.
Kayla removed Spanish billionaire Duardo Alvarez's wedding ring after just seventy-two hours of marriage. But now desperate circumstances have forced Kayla to beg her ex-husband for help. Duardo's price is high: marry him again, or he'll walk away. A trophy wife by day and Duardo's mistress by night, Kayla discovers her "duty" marriage is as passionate as ever!
Harlequin Presents - # 2563