Help, please

So hmm... I'm looking for a story that i read already but don't remember the title. It was about an empress with white hair and purple eyes and she was in love with the emperor but he loved another woman. So with time the empress stop to love him (but not completely) till the other woman that the emperor loves came back with a son saying he was the emperor's son. Then the empress (who was pregnant already but the emperor didn't know) leaves the palace. And with everything happening the emperor finds out that he likes the empress. I don't remember anymore LMAO pls help me if you can