The Sheikh's Last Mistress (Harlequin Presents Book 3427)

Promoted to Princess! 

Destiny Richards knows she is playing with fire when she accepts charismatic Sheikh Zafir Al Asmari's job offer, but it seems like a fair price to pay to start her life over again. Until the temperature reaches the boiling point and Destiny finds herself spending one out-of-this-world night with the sheikh! 

When powerful Zafir seduces English rose Destiny, he never anticipates she'll hold the title of his Last Mistress. But their scorching affair has shocking repercussions. Now, before their nine months are up, Zafir must convince Destiny to make their arrangement more permanent!