Arabian Mistress by Lynne Graham

Begging for Prince Tariq Shazad ibn Zachir's mercy was the last thing Faye wanted to do. She hadn't seen Tariq for a year...since their wedding. But Faye's brother was imprisoned in Tariq's homeland, and only Tariq could grant his freedom.

Faye expected her meeting with the man she'd married to be tough, but Tariq's ultimatum took her breath away: become his mistress and her brother would be released!