Navier was the perfect empress, however, the Emperor wanted a wife, not a colleague. And so, the Emperor abandoned Empress Navier and placed a slave girl beside him. That was fine, until Navier heard the Emperor promise the slave girl the Empress’ position. After much agonizing, Navier decided she would remarry the emperor of the neighboring country.

(Source: NovelUpdates)

“Why should I only marry one man?” the female emperor declared.
“During past generations, the emperor has had at least five concubines and an average of fifteen. Now that I’m Emperor, I should have at least five concubines, too. The son of a chancellor? The successor to a powerful family? If they’re good, send them to the harem.”
“My favorite one will become the male empress.”