Student finance application support

Hello, I would like to know how I can support my partner's application? I applied for student finance and now my partner has to support the application in order to prove the receipt of a household, but the problem is that she does not have a National Insurance number and does not work. She is at home taking care of our children. What is the procedure then? What could prove the reception of the household? Thank you

Hi there,
You mentioned you wish to support her application, are you both students? Thanks, Jason

Not only I am a student