Marriage to a
      married woman in order to get citizenship
Question

                My question is in regard to
      marriage. My wife is married by paper to my brother so that he can get his
      citizenship. I am married to her Islamically. She is often worried that
      this is Haram and we have many discussions on this topic. We need a more
      clarifying answer to put this issue to rest, she is very worried.
Praise be to Allah.If your marriage was contracted first and was done
      according to the conditions of sharee’ah, then she is your wife, and
      your brother’s marriage to her is invalid and does not count. He has to
      repent to Allaah from what he has done, and you and your wife also have to
      repent to Allaah if you helped him to do that. Let your wife rest assured
      that your marriage to her is valid so long as all the conditions required
      in sharee’ah were fulfilled. And Allaah is the guide to the Straight
      Path.