These are the rules for Canadians without Covid symptoms returning to Canada as of August 2020.
You MUST quarantine for 14 days, provide contact information and
monitor yourself for symptoms subject to the Minimizing the Risk of
Exposure to COVID-19 in Canada Order (Mandatory Isolation) No. 3.
Ensure you have a suitable place of quarantine that has the
necessities of life. Go directly to your place of quarantine without
delay and stay there for 14 days from the date you arrived in Canada.
You must wear a suitable mask or face covering while in transit.
Practise physical distancing at all times.
Note that quarantine means not having contact with anyone outside your household. (your household being people you live with, i.e. you and your wife). So you need to spend 14 days in quarantine in your home before you visit (or are visited by) your close friends and family. You would want to do this anyway because your 92 year old mother is exceptionally vulnerable to Covid.
You need to convince border guards that you have a plan to achieve this and will follow it before they allow you in.