Sorry, i would like some help since i don't remember the name, just the first part of the novel. The MC was trained since young to be the "perfect" empress, the emperor bed her (to fullfil their marriage) and divorced her after one day, her family expulsed her because she didn't oppose to the divorce, and she went away and found that she's pregnant and the kid looks like the father (emperor), she uses a potion to change the eye color of the kid since they're unique to the royal family, the emperor was looking for her( because the will of the empress dowager) and she was running away since she was scared for her son's security if the emperor or the aristocrats found that he's a royal (there was some kind of rebellion on which her father was involved, but the emperor doesn't blame her for that). Her name was something like Astel or Astelle and the emperor was Kaiser. I would be grateful if someone that knows about this one, told me the English name, please.