Ever since I was born, I have borne the weight of disgrace and sin because I was the mistress's daughter. I was born at the same time as the legitimate wife's daughter, and my name was registered under hers. My father told everyone that his wife had given birth to twins. But after we were born, I was treated worse than a dog and bullied relentlessly. Then, on the day I met my true love and hastily married into a wealthy family, my father got drunk and revealed my real identity in front of everyone. It turned out that my sister, who was always calling me a bastard, was the mistress's daughter. My father was afraid my mother would abuse the mistress's child, so he secretly switched me and my sister in the delivery room.