My elder sister forced me to change my marriage? I became the favorite in the harem by eating melons

In the previous life, Yu Huan was a fig leaf for the Emperor of Daxiliang and Bai Yueguang. On the surface, she was the most glorious Queen of Daxiliang and the most promising daughter of the three sisters of the Yu family. The Emperor of Daxiliang obeyed her every word, dismissed the harem, and doted on her all his life, making women in the world jealous. In fact, Hua Qingluo just used her as a shield and gave all his love to the man he hid in the dark and could not see the light. The eldest and second sisters were reborn, jealous of her glory in the previous life, and in this life, they would not hesitate to die to change husbands with her. Yu Huan smiled and agreed. Being the Queen of Damu is much more interesting than being the Queen of Daxiliang. At least the Emperor of Damu...