The Reborn Concubine Wants to Exchange Marriages

[Ancient times + marriage exchange + twin births + refreshing articles + sweet pets] Both sisters were reborn. The concubine saw that her eldest sister had a better life than her in the previous life. The person she chose to marry was already a powerful one, so she had to change her marriage no matter what in this life. It's a pity that she was wrong. The most powerful person in this life was Gu Siyu. Tears stayed after knowing the truth.