No. Don't let it go. She's doing it so she misses the "rush hour" when all the kids are getting on buses and getting picked up by their parents. She just doesn't want to wait 15 minutes in line with everyone else. If there is NO REASON (like a Dr appt) that she needs to get picked up early, she shouldn't be doing it. It's a bad precedent to set that you will have to deal with forever.