Sorry to hear about your sitch. Your W took your S and then went NC? How old is your son? That is just not right and so unfair to your S. Have you contacted a lawyer? It is one thing to leave your H and to want to limit contact but she has responsibilities to your S. He has a right to see his father. Is your W financially independent or does she depend on you? If the latter, maybe you should cut her off until she gives you access to your S. Wow. So selfish.