Noted.
Any properties, insurance, fixed deposits, bank accounts in joint names?
Any trip together with proofs like airline ticket, train/ bus tickets, hotel receipts?
Facebook / social media posts mentioning wishes by the family members and friends?
Special gifts exchanged between two of you....some proofs?
Anything that will establish solid relationship proofs between you and your husband?
Also attend interview with your kid and make sure that all answers match with your husband.
Don't forget to make a solid notes with evidences that you would return to Canada as soon as your husband's application is approved! This one is very important! Please check below my new post on financial independence of the sponsor and applicant!
Good luck!
Hasan