Neglect? Hardly. She was driving along near them. They were supervised the whole way. No-one was going to kidnap them etc. Case closed.
One of my neighbors had a similar incident. We’re 2 1/2 miles out and she told her kids that if they had to stay after school for misbehavior and she had to come after them, they would have to walk home.
As it was late in the afternoon and getting darkish, she followed with the lights on and some old hag called the cops saying she was threatening the little brat.
No charges were filed, but she won’t do that again.