Is the sister's abstention from visiting her brothers, who did not defend their mother against their wives, and her telling them, "Go and shave your beards; for you know nothing of religion" and "Start preaching to your wives; for you fell short in your mother's rights," considered cutting ties of kinship and mockery, especially since she believes she is disciplining them in this way?

The virtue of a mother is immense, and the Sharia (definition) has granted her a great status and obligated honoring her. A wife is not obligated to house her husband's mother with her, and she has the right to request a separate dwelling from her husband's family. The brothers are not held accountable if their wives refuse to live with their mother, and this does not imply that the brothers are controlled by their wives. If the mother is in need of housing, financial support, or care, it becomes obligatory upon her children to provide it. Whoever falls short in this is disobedient and should be advised and reminded of their duty. It may be permissible to shun the disobedient person, while considering the overall benefit. Maintaining kinship ties can be achieved by exchanging greetings, but merely greeting them in the street might not fulfill the required kinship ties according to Sharia and may even offend relatives.