Is boycotting a mother who insults her son and his father's family considered impermissible (haram), while striving not to disobey her commands as much as possible?

It is obligatory for Muslims to strengthen their faith-based brotherhood and avoid anything that weakens it, and this is especially emphasized among children, parents, and relatives. A mother must treat her son and his family kindly and avoid mistreating them. However, a mother's mistreatment does not negate her right to dutifulness and kindness, for this is among the most obligatory duties, and a mother's right is more affirmed than a father's. You must be patient with your mother, treat her with kindness, not sever ties with her, and pray for her righteousness, for your good treatment will change her behavior.