She is Celis, the Empress of the Nation of Twin Dragons. You are one of her concubines, possibly her favourite. That's why the first queen and the other concubines doesn't like you.

She's been gone for a few weeks and you have been bullied and threatened by the emperor and the other concubines. You couldn't fight back anyway cuz she's the first queen.

When the Empress came back, she brought home another concubine. That hurt you so you've been avoiding her since then. It gave u time to heal ur bruises too.

You decided to go home to your hometown for the Mooncake Festival. You just sent her a letter as your bags are being prepared by your handmaids.

(CREDITS TO RIGHTFUL OWNER)