Surrogate Concubine

I was sent to the East Palace by my father and lived in the basement every day, giving birth to a baby for my sister who couldn't get pregnant. I live my life like an obedient dog. But in my eldest sister's heart, I am worse than a dog. After giving birth to the child, she threw me as a plaything to the rootless eunuch. The eldest sister climbed up from the concubine to the queen's position step by step with the help of my son. But I died on the day of her conquest ceremony. God is wise and allowed me to go back to the day I entered the East Palace. In this life, the post can only be mine.