I think nearly all your stories on Maman have either mum or dad dispensing discipline to their naughty child, but in my own upbringing, my parents frequently ‘collaborated’ in the administration of corporal punishment.
When my sister and I misbehaved, Mum would take us into the lounge and sit on an armchair, while Dad went to fetch the slipper that was kept for our bottoms. Once he returned with the slipper, Dad would sit on the settee opposite my mother. If only one child had been naughty, the other would be called in to witness the punishment as a warning to behave.