A mortgage finances probably your most expensive asset, and an important part of your life - Your home. It is therefore wise to protect that asset from unexpected financial strain.
You should look at mortgage life insurance, especially where two incomes are involved. The cost is low and can be incorporated with your mortgage payments. Your balance will be paid in full (the maximum varies with different financial institutions) in the event of death, terminal illness, or permanent disability. These quotes are available with each mortgage approved on the system.