Mr. and Mistress by Heidi Betts

She was his kept woman…a secret lover living in Las Vegas luxury. It had been an ideal situation. Until Misty Vale discovered she was carrying Cullen Elliott's child.

Misty was not the type a millionaire like Cullen could ever take as his wife. Her past was scandalous…his family above reproach. How could she ever tell him the truth? But Cullen had ways of finding things out. And he wasn't about to allow his heir to be born on the wrong side of the bed!