Xiaofeng and that fat sister-in-law are not sisters-in-law. The live broadcast of the fat girl mentioned relatives, and Wanxiang's food girl just made a video recently, and did not mention that she was related to the fat girl. However, in Xiaofeng's video, the same person appeared in the video of the fat girl, that is Xiaofeng's mother and the fat girl's grandmother. Xiaofeng's mother is grandma of Fat Sister, Xiaofeng and Fat Sister are nephews, and Xiaofeng and Fat Sister's mother-in-law are not sisters-in-law.