Should a mother be obeyed in cutting ties with her cousin's daughter, given the mutual accusations that occurred between her and her own daughter?

Accusing someone of adultery without proof is a major sin and a reason for the accuser to be flogged eighty lashes. Such an accusation is not permissible even if the accused was the initiator. One must repent from such an act. Cutting off one's paternal female cousin may fall under the prohibited breaking of kinship ties, and even if it does not, it is not permissible for Muslims to shun each other for more than three days. Therefore, one should fear Allah, reconcile differences, and initiate peace.