My sisters and I were well aware that Mom and Dad used spanking as a method of discipline, not only for raising thier children, but also for disciplining each other when necessary.
Dad was ultimately the head of the household and made final decisions regarding family disciplinary matters. Of course, Mom would often discipline my sisters and me as needed without his participation (usually a trip over her lap for a bare-bottomed spanking with the hairbrush paddle -- a homemade paddle shaped like a large hairbrush, but no bristles). But, if she felt that Dad's more severe discipline was called for, she would make sure that we would have appointments with him in his workshop, which usually meant a bare-bottomed tanning with the homemade leather punishment strap.
When she was a naughty wife/mother, Mom also had appointments with Dad in his workshop.
But, Dad believed that it was his responsibility to make sure that every family member received the discipline that he/she deserved, so he would also submit to a good whipping with the strap when he was found to have been a naughty husband/father.
We had a very loving family, but family discipline was taken very seriously! Every member of the family knew the family rules and was aware that painful discipline would be administered to correct disobedience, disrespectfulness, dishonesty, etc.