Yixiu's Rebirth: Sending Bai Lianhua's Sister to Become a Concubine

Evil woman setting?? High-level palace fighting to chase the wife, the crematorium is not OCC! The male protagonist is unclean! The concubine Yixiu was reborn on the first day of her sister Chunyuan entering the Fourth Prince's mansion. When she woke up, her sister, who was wearing auspicious clothes, said to her tenderly: "I'm here to take care of my sister." Yixiu sneered: "... Dressed up to take care of a pregnant woman, do you really think I have never given birth to a child?" In this rebirth, she must not only be the legitimate wife, but also the queen and the queen mother. The son must also be a legitimate son! What?! Everyone praises Chunyuan for her dignified and pure character, so why did she seduce her brother-in-law when her sister was pregnant? Everyone envies Chunyuan's mother's noble birth of Aisin-Gioro? Yixiu...