I agree with the majority of what others are saying here. Since late pick up is a reoccurring thing, I would ask what the parent has going on and try to emotionally connect with them. Then, I would say that we understand that life can get busy, but here we also want to respect our staff’s time and that 20 minutes is a long time to be waiting after hours after all children have been picked up. Of course I would start this conversation off non-judgmental and thinking about the families perspective.