Final answer:
The woman he married was unusual in that she was of mixed race, which ultimately led to their surprising divorce due to societal pressures and the husband's concerns with race and reputation.
Step-by-step explanation:
The unusual aspect about the woman he married is that she was of mixed race, revealed through certain excerpts hinting at her experience of racial matters, her unexpected divorce, and her own contemplations about her identity. The narrative describes her as initially unaware of her husband's priorities towards race and social reputation, but through unexpected circumstances such as the divorce, the weight of these factors becomes apparent. This woman, Amy, had been confident in her distinctiveness and the love her husband professed, but his actions, driven by social pressures and racial prejudice, proved otherwise. There's an indication that her husband's change of heart was influenced by her mixed blood, a factor leading to societal disapproval and ultimately the unforeseen termination of their marriage.
Furthermore, the story reflects on various women and their roles or circumstances, outlining societal expectations and norms, pointing to a greater commentary on gender and identity within the context it presents.