Palms and Eyebrows

Please Tell Me the Name of a Novel I Have Read! I Can't Remember Whether I'm Dead or Alive

The heroine is the daughter-in-law of the Xiao family. However, at the beginning, all members of the Xiao family were killed in the battle and were wrongfully accused of treason. So the hero should be the adopted son of the Xiao family? In my memory, I called the heroine sister-in-law. At this time, the heroine and the hero supported the Xiao family step by step, and then the third brother survived at the scene.