Black magic

I have a question about my friend. My friend was a victim of black magic and jinns since long. So she was not getting married due to jinns. She tried many islamic wazifas and took help of many islamic scholars to get cured black magics on her. But after some time situations used to re-occur. My friend got a marriage proposal again. Guy said he really liked the girl and my friend also liked this proposal guy very much. But for no proper reason this proposal also got rejected. After years of trying to get rid of jinns by islamic way. Jinns used to again attack my friend's marriage proposals again. My friend finally visited a man who had jinns under his control to eliminate the jinns which were causing problems in my friend's marriage proposals. And my friend used help of jinns to get back the lost marriage proposal which got cancelled for no proper reason. And she got married to this proposal muslim guy in islamic way of getting married. My friend did sin but she strongly believed in Allah is the only God and creator of this universe before marriage, while her marriage and still my friend believes that Allah is the only God. Now our question is, is my friend's marriage relationship with her husband is valid as per islam? Are her children from this marriage legal or illegal as per islam? And all this while when ever she was physically close to her husband, was legal or illegal? Please reply, eagerly waiting for your soon reply.