My sister can't make the bed for my brother in Sichuan. According to the traditional culture and social customs in China, an elder sister usually doesn't make the bed for her younger brother, which is an inappropriate behavior. Because the elder sister is usually the eldest daughter of the family, she has to take on more housework and take care of her younger brother and sister, while the younger brother is the male of the family, so she should learn to live independently and take care of herself. In this case, it may be considered an abnormal or inappropriate behavior for an elder sister to make the bed for her younger brother.