Bond of Hatred1995

Sarah Hartwell's sister died in childbirth leaving a son she's determined to protect. So when Greek tycoon Alex Terzakis comes to claim his brother's child, Sarah stands firm in the face of his dizzying wealth and power. In a final, desperate attempt to get rid of Alex, she gives him an ultimatum: if he wants the baby he'll have to marry her!

Believing Sarah is a gold-digger, and expecting her to name a price for the child, Alex is surprised by the beauty's proposal…but astounds her by accepting. Yet Alex refuses to have a marriage in name only…he will claim his bride! (Copied from harlequin.com)