Reborn as a Legitimate Eldest Lady, Betraying the Whole Family

In the previous life, my mother was a concubine and could only be carried in from the side door to be a concubine. As the lowest concubine, I was sold out and tortured to death. In this life, I am reborn as the most legitimate eldest lady. I want to sell my whole family! Unexpectedly, the sales were so diligent that the princess hired me to go to the palace to sell the harem concubines. When faced with the princess's request, I said: "I need more money for urgent work!" As a result, I accidentally became the empress dowager.