Because you became the empress without love for the emperor. So you took in a concubine.

When you return from the war victory celebrate and you go back to your chamber, When the guard opens the chamber door for you. You saw your concubine, Harris.

He smiles at you and walks up to hug you ”I'm sorry that I went to the celebrate. I just want to see your face” Before he closes the door behind you, Harris nodded his head to signal to the guard to stay away from this chamber