On the Eve of the Wedding, I Was Replaced by Her

On the eve of the wedding, he came leading another woman: "She is my real fiancée." The wedding dress, household registration book, wedding live broadcast, and circle of friends were all replaced by her name. The whole family agrees that she is "I", and her photo is even on the marriage certificate. But I obviously still stood there and never left. They called me a "fake" and said I should bow out gracefully. But who will tell me - who is she? Who am I?