In spousal sponsorship, the emphasis is on the genuineness of the relationship. The onus is on the couple to prove that their relationship is genuine. If a couple has entered into the relationship solely for the purpose of immigration, the application will be refused.
A sponsor takes full financial responsibility for a sponsored spouse/common-law partner by signing an undertaking for 3 years. If their sponsored spouse or common-law partner requires social assistance within 3 years after being granted PR status, the sponsor is obligated to repay the sum.
If the spouse or common-law partner are in Canada and are residing at the same address as their sponsor, they can apply for an Open Work Permit if they have a valid Temporary Resident Status.
Parents/grandparents-in-law, parents of your spouse or common-law partner, cannot be sponsored, but you can be a co-signer on their application for sponsorship to meet the necessary income level.
Your own parents or grandparents