Books in the Rules of Engagement, 2 series

His rules. Her pleasure. His way. Italian heiress and international financier Milla Castra knows she can't avoid him forever. Irredeemably confident and controlled Lex Duncan once shared her craving for things deliciously forbidden. He was her lover. Her Master. And the husband she's kept secret from everyone. But Lex will never relinquish what's his---and Milla is definitely his. And he knows she can't resist the exquisite pleasure that awaits in his arms. When the violence of her past threatens them both, Lex will risk everything to keep Milla safe . . . before she submits to the cruelest master imaginable, Fear.