How can mom and sister help make up when they are in conflict?

First of all, don't tell outsiders about the contradictions within the family, which will inevitably become a topic in others' mouths. When mediating the relationship between mother and sister, first of all, let sister understand that she will be the daughter-in-law of others like her mother in the future. When you meet your husband's family, how to deal with those small contradictions and put yourself in others' shoes. Besides, her mother is an elder and just doesn't agree with her. You should also respect your elders first. Talk to your mother calmly at the right time. There will be some generation gap between your mother and grandpa, just like you and your mother, so your sister can't understand why your mother says grandpa. As a mother, she also has her difficulties. Children should be able to give in to their mothers first, apologize to their mothers, and pay attention to their attitude and tone. In fact, if you think about her, her generation has come from hard times. Tell my sister more about how good my mother used to be to her, and then she will slowly resolve it. When you tell your mother, you should also say that my sister is her child and how old she is in her eyes. There is no need to be angry. I wish your family happiness and harmony!