Thing is that if INS   track your information and find out that you are married to this person and have different home address and living separately than sure they will deny your case and also in some cases they might give you guys a surprise, coming to your house to see if you guys really living together or not ( this happen usually when they have complain about you and your partner or if INS feels that this might be a fake marriage). It's better to live together know each other lifestyle and if they take interview separately also u guys can give same answer.  They might ask question like what's the color of your refrigerator, tv, sofa etc etc. Good luck .