Magnate's Make-Believe Mistress (Silhouette Desire, #1955)

Her new client was devilishly handsome, superbly charming...and absolutely hiding something. Why else would a man as rich and powerful as Cristo Veron have any interest in the cleaning services of lowly Isabelle Browne? Her suspicions were confirmed when she discovered his real reason for hiring her. And suddenly, she was agreeing to a preposterous proposition....Cristo would protect his family at any cost--and keeping Isabelle close was key to his plan. Having her pose as his make-believe mistress was step one. But he hadn't counted on wanting to make the pretense a reality. Rated '2/5 - Behind closed doors' for steam/spice/heat level.