What is the ruling of Islamic law regarding a wife who severs ties with her husband's family and refuses to visit them, and regarding family members who boycott their son and his wife due to disagreements, and is it permissible to deprive grandparents of seeing their grandchild?

The questioner must continue to honor his parents, obey them in what is right, visit them, and maintain ties with his sisters and maternal uncle, seeking Allah's pleasure, without concern for their reciprocation. The wife must obey her husband in visiting his family unless harm results from it. The husband should explain to her that her kindness to his family and overlooking their mistakes helps foster piety and maintain kinship ties, increases his love for her, and is a form of good character that weighs heavily in the scales [of good deeds]. Both of them should make abundant supplication.