My 2 grandchildren are supposed to come to my house every other weekend. They haven't done that in 6 months, and they still aren't doing so. Their father said we have no right to see them, even though he said we could. I have papers stating that it is a visitation right and that it is court orders for them to see me. Is is illegal for their father to keep us away from them? We don't have any restraining order or anything. Their sister has to live with this and it breaks my heart because she cries everyday and every night because of this. What am I supposed to do?