Is there a sin upon the wife for shunning her husband's family who falsely accuse her with lies, and for refusing their entry into her home or her daughter's going to them?

Lying and harming a Muslim are forbidden. Lying leads to wickedness and Hellfire. Reviling a Muslim is a transgression, and harming believers is slander and a clear sin. The husband's family should fear Allah and refrain from lies and abuse. The wife should be patient and respond to mistreatment with kindness, striving to open a new chapter with them through communication, visits, and offering gifts, for gifts open hearts. If that does not work, she should go along with them and not prevent her daughter from visiting her family to avoid severing kinship ties.