Rebirth and Wife Swapping, the Beggar's Wife Turned Out to Be the Current Empress

Yan State. In my last life, my cousin and I got married on the same day. My cousin's wife was the daughter of the county magistrate, and my fiancée was just a girl I picked up from outside. Because she was in such a miserable state when she came back, she was called a beggar girl. But my cousin has coveted my fiancée's beauty for a long time, so he teamed up with his adoptive mother to drug him and make her drink alcohol. In the end, by some strange combination of circumstances, I ended up in my cousin's bridal chamber, while he went to the beggar girl's room... But that night, my fiancée vowed not to escape from the new night, and my cousin could only watch me and the county magistrate's daughter have a bridal chamber. After that, in the eyes of my cousin, I became more prosperous through the influence of the woman, becoming the richest businessman in the capital, and even gave birth to a fat boy. He was reduced to becoming a beggar, which made him jealous. In this life, my cousin will never change! I won't change anything! He figured out that the future is far more important than beauty! What's more, it's still beauty that can't be obtained! But he doesn't know that my beggar wife is actually the Empress of Yan...