The only people who will contest the legitimacy of your marriage is the two of you. If you both agree that this is going to be a valid marriage, then you have little concern. Your fiance's brother can marry you. If, at some point in the future, one of you decides to contest the validity of the marriage, the marriage will likely hold up in court, but if you want to make 100% sure, then have a church official or a local magistrate or judge marry you as well.
Answered on Oct 29th, 2012 at 9:37 AM