Hey! Sure!
Our RFE was about household. We put all the info on our application, but still got a RFE about it. Question was about kids (which we don't have yet), so we put answer on the list and sent it back. As an additional information we added more proof about relationship: photos from our wedding, honeymoon, photos with friends and family, bank account statements with my name in it and also added some letters from our friends that they've been seeing us together and relationship is legit.
I wish you smooth process and fast approval!