River Lady by Jude Deveraux

In colonial Virginia, beautiful young Leah Simmons tries to escape her life of poverty and her abusive father in the comfort of dashing Wesley Stanford’s arms. He’s furious when he learns she’s pregnant, for he’s engaged to marry pampered socialite Kimberly Shaw. He dutifully marries Leah -- too blind with rage at losing Kim to notice Leah’s many charms -- and strikes a bargain with her to divorce once they reach his plantation in Kentucky. After all, she’s strong, independent and wise...does she really need him? To learn the truth, Wesley devices a scheme that goes awry and places them into the hands of robbers, imperiling both their lives... and forging a bond as passionate and strong as their struggle for survival.