The reality is that even if it is 5 minutes unless the ministry is parked down the street observing your home - how's that for making one paranoid, lol. They won't know when the time started of parent arriving. If they are already there when parent comes I'm sure she would be making it quick or more than likely detained to be spoken to anyways. The likelihood of the ministry suddenly showing up at pick up time is not very likely since the goal is to catch us over our limits during the day not an extra child on our property for pickup since in a court of law I doubt a judge is going to uphold a fine because another adult did something beyond your control.