Bought by the Sheikh (The Sheikhs of Havilah #2)
Diana Fraser

Raised by her eccentric grandfather in the deserts of Taraq, Gabrielle loves the country and Zavian so much that she leaves them. He's to become king and he needs to marry a suitable Bedouin. So she accepts Zavian's father's bribe to leave--it was the only way to make sure Zavian didn't follow her--and, in so doing, exiles herself from the only home and man she's ever loved.
But a year later, as wedding plans are underway, Zavian suspects Gabrielle is the anonymous donor of one his country's most precious artefacts, purchased for the exact sum as the bribe. So he buys her services from her university in order to find out the truth and rid himself of his obsession. Besides, if Gabrielle can't be his wife, then why not his mistress?
The Sheikhs of Havilah
The Sheikh's Secret Baby
Bought by the Sheikh
The Sheikh's Forbidden Lover
Surrender to the Sheikh
Desert Kings
Wanted: A Wife for the Sheikh
The Sheikh's Bargain Bride
The Sheikh's Lost Lover
Awakened by the Sheikh
Claimed by the Sheikh
Wanted: A Baby by the Sheikh