Cao Gong & Dao Fang
The Book of Han records the two palace women as duishi — "eating facing one another." The Eastern Han commentator Ying Shao glossed the term without euphemism: palace women who became husband and wife to each other, and who were fiercely jealous. Both women are named; the jealousy is exclusive. It proves no modern orientation, but it does prove that women inside the palace built bonds their own contemporaries called a marriage.