Your post is indeed full of incongruities.
First of all, you state that he has now to stay away from his "legal" wife and children. Does that mean his second wife is illegal? Then secondly, why did he not apply for a visa for his "legal" wife and his children?
Possibly, the "legal" wife has lost her charm and the fatherly love have all been taken away from the children by the "new and fresh and beautiful and young and charming face" he is now enjoying his time with. I guess a lot of money in the pocket sometimes results in change in the thought and outlook of some people, even towards his own family. .