Joined By Marriage by Carole Mortimer

A forbidden passion!Shortly after Brianna's twenty–first birthday, a letter arrived that changed her life. It led her to discover she was adopted, and also to meet darkly handsome lawyer Nathan Landris. Brianna sensed she shouldn't get involved with Nathan, but he could help her discover the secrets of her birth parents. So she accepted his invitation to have dinner.

Within days, Brianna was riding a roller coaster of emotion: surprise after surprise emerged about her past, and she was in danger of falling for Nathan which would never do! One of her discoveries about her family suggested that Nathan's passion for her could have startling consequences .