Castle of the Lion (Harlequin Romance, #2615)
Margaret Rome

Stelios Heracles was one of the most powerful officials in the Cypriot government. Without his help, Petra's brother would surely end up in a Cyprus jail.
Out of desperation, Petra agreed to a bargain - a loveless marriage to Stelios in return for his intervention. Stelios would have Petra as a vessel to ensure his future heirs.
And in keeping with ancient customs, he would have other women for love....