Horrible. There are so many things wrong with this. First they don't mention how old the second child is but I know my kids held my hands the moment we were near a parking lot until they were at least 5 or 6 years old, maybe older. Secondly, to ASSUME a child got into the car without checking before she left??
Third, a 3 year old should be buckled into a car seat so even if she though the girl had climbed into the car she should have been going over to buckle her car seat. Fourth, why on earth would she drive back to the daycare center
Hello!! call 911!!!