Respectable unmarried women in 1900 didn't tumble into bed with men
One thing I find highly anachronistic is that both Cornelia and Lucy ended up having full on sexual affairs with men they were not married to, with very few qualms or hesitations. A nurse was by definition unmarried back then, and hospitals had high expectations for the morals of the nurses they employed. If a nurse had either gotten pregnant or even been suspected of having unmarried sex with a doctor she would have been dismissed without references. This would have resulted in her ending up on the streets, unable to find work. What I am saying is that the stakes for premarital sex were extremely high in the morality of 1900!
And although Cornelia is higher status and has rich parents, she would have been socially shunned and possibly disowned by her family for turning up unmarried and pregnant, let alone with a black man.
My point is not that single ladies in a respectable position in society never gave in to the temptation of a "seducer," because there are examples in history of women who did. My point is that it was unusual, had grave consequences and any lady of the time would have been extremely hesitant to do so. She would have weighed the consequences at length before making such a decision, and she would realize that she was "throwing herself away." She would only have done this in the belief that her seducer would marry her. Ladies did not just feel free to fall into bed with men they found attractive and got to have feelings for.
In fact, men of middle and upper classes wouldn't even have expected or invited a "lady" to have sex back then. "Ladies" were supposed to be chaste, pure, moral, and on a pedestal. Men had sex with fallen women and prostitutes. It was thought that women were only led into disrepute by men due to their "animal nature," and a man would have seen himself as "ruining" a young lady by having sex with her because her reputation would be destroyed and she would be unmarriageable. Women's job was to resist, to protest, to preserve her virtue at any cost. These women's sexual behavior is that of a woman of 2016, but not of one in 1900.