He is not a minor..right?You are not legally responsible for him or where he lives if he is over 18..I'm sure he told the court it was no problrm..he has a place to go..your house.If you don't want that (I know I wouldn't!) then you have every right to not have him there..what does your husband want?How wll this effect your marriage/Your peace of mind?What is best for the rest of the family?