Are children permitted to visit their divorced mother who incites them against their father, especially after a long period has passed since the divorce and the father has settled into another marriage?

It is not permissible for the custodian to prevent the other party from visiting the children, as this constitutes a severing of kinship ties. The visit should be limited to what is necessary for maintaining kinship ties if there is a fear of corrupting the children's morals or inciting them.