The True Bride's Silent Revenge

The woman the household calls the warlord's wife is Su Lan. A year earlier she killed Su Ying's family and went to the wedding under Su Ying's name. Su Ying lived through it. She came back with a face nobody knew, took the name Shen Wanyin, and let everyone believe she could not speak. Su Lan needed someone to carry a child for her and had the mute girl brought into the mansion. That is how Su Ying got inside, sworn to make the people who killed her parents pay for it. What had taken hold of the warlord in the first place was Su Ying's voice and the mind behind it, and Su Lan had no way of producing either. He tells anyone who asks that he has one wife and loves only her. Su Ying, silent and close at hand, draws him in, and his body knows her before his eyes do. Su Lan sets about framing her and running her down inside the house.