Is it permissible to take the children to visit their grandmother without their mother, knowing that the mother refuses this and insists on accompanying them or having the grandmother receive them in her home, while the grandmother refuses to see her son's wife?

The first step to resolving the issue is respectful dialogue and understanding between the spouses, away from anger. It is unreasonable for a dispute between the wife and the mother to be a reason to prevent the children from visiting their grandmother, or for the wife to insist on not visiting them without her. If the situation does not improve, the husband has the right to take his children to visit his mother, out of filial piety and to maintain kinship ties with her. Efforts should be made to reconcile the mother and the wife, and to remove the causes of contention between them with wisdom and gentleness. Good-hearted people can also be brought in to mediate.