Her husband will not let their children visit their kaafir grandparents
Question

                My husband and my family do not get along, they are not muslim, although I have invited them many times, nor do they understand Islam.  My husband wants to prevent my parents from seeing my children because he feels they have cursed Allah, although they have not done so.  Is this allowed?
Praise be to Allah.We asked our shaykh, Shaykh Muhammad ibn 
          Saalih al-‘Uthaymeen, about a woman who says, my parents are kaafirs 
          and my husband will not let the children see them. Does he have any 
          right to do that? 
         He answered, may Allaah preserve 
          him, as follows: 
He does not have that right, but she should be tactful 
          with him. It should be said to the husband that if there is no danger 
          to the children’s religious commitment, he should not stop them (from 
          seeing their grandparents). And he can be on the safe side by going 
          with his children when they visit their grandparents.