Books like The Millionaire's Mistress (Passion!) by Miranda Lee

Made to be his mistress! Justine Montgomery desperately needed a loan to help her and her mom avoid being thrown out on the street. So she asked handsome millionaire banker Marcus Osborne for help. Marcus had no illusions about the Justines of this world; he could tell just by looking at her that she was a gold digger, out to target a rich husband. Just like his ex-wife.... But Marcus was also glad when Justine told him she'd do anything if he'd lend her money. He'd give her the finances she wanted, and she'd repay him in his bed! Marcus, a man who preferred the company of women who were willing to work for him, found himself completely captivated by Justine, who was more interested in the wealth than the romance of the man's heart. Their relationship grew more complicated, and Marcus found himself questioning everything he had believed in.

First publish date: 1999