Responses
She was pregnant before marrying the emperor, she kept it a secret to the whole empire, even the emperor didn't know because he is a scum. The empress even hid the fact that she gave birth to a boy because she doesn't want her son to be the crown prince and because he is still in live with her father's assistant. According to the sources.
Wait I’m actually a little heartbroken that the empress had kids with that shitty ass emperor