Is it permissible for a mother to slander her daughter and defame her honor without her and her children paying the price, and is it true that a judge cannot rule in favor of a daughter in a case she files against her mother?

If what was mentioned about the mother's affliction, injustice, and accusation of her daughter's honor is true, then this is a great injustice and a major sin. Nevertheless, a mother remains a mother who must be honored and treated kindly, and not abandoned. It is advisable to be patient, forgive, and not sue her, and to pray for her guidance. As for the brothers who delve into one's honor, it is permissible to abandon them and sue them if there is a hoped-for legitimate benefit, though forgiveness is better.