Evidences other then Utility bills for Partner's Achivements

[Mechanical-engineer]

Hi all,
Unfortunately, my first application was not successful because HSMP team did not awarded points for my Partner's achivements.....reason was that I did not provide enough evidences to prove that my wife live with me.I was not in a position to provide tenancy agreement,utility bills because I am living ina combine family and my elder brother has all these documents on his name.
Question:
What are the other acceptable evidence which can be provided to prove that we r living together.

cheers,