I feel my wife does black magic, what can I do now ?

My wife believes in black magic and says my mother and sister has black magic on her. Her family supports her. My life has become. She can her family anytime and can call her family at home. But my family is not allowed to visit at my placem. She never goes to my family's house so even I have stopped going to her house now. She is very possessive and feels that my family wants me to leave her. And she also says that they just want money from me which is wrong. My family had ask end number of times to talk and discuss things out but she is not ready to talk. She just wants to fight. She also teaches my son who is only 7 that they have done black magic on you and dont worry will get it cured. She had many black magic experts and wasted so much of money. Please advice