Vj USerrr

Hi , I (U.S Citizen ) have filed I-751 application with my spouse ,we submit every single documents such as our child birth certificate ,joint taxes ,joint bank statements ,family pics ,health insurance ,joint club cards ,joint utility bills ,medical bills ,our child pediatrician summary visits accompany by I and my wife. and so on but what i didn't submit was my mortgage document as house is on my name (which i bought before our marriage ) and I just didn't bother to add my spouse name because her credit isn't good yet and we thought we can buy another house on her name as first buyer so we only have to put 5% down . My concern is it mandatory to have spouse name on house mortgage for I-751 approval ,I saw some youtube videos and they mentioned that in interview letter they asked you bring documents which you haven't submitted with your I-751 application ,in my case mortgage document .And then if you don't produce joint mortgage document they will deny your application .Does anyone have experience with that kind of situation or should i just have her added now .If this is something which they think is must have then i can contact my mortgage and have her added ,if not then for reasons mention above ,I am thinking to keep as it is so we can buy another home on her name in future. Thanks