How very sad.
By way of comparison, there are seven EU countries that allow you to ride a moped from age 14: Estonia, France, Hungary, Italy, Latvia, Poland and Portugal. As against 20 that set the minimum age higher. Rider training is important.
If I was faced with a situation as the car driver described it, I hope I would have the presence of mind to blow my horn and flash my headlights, as well as hitting the brakes. And try to steer out of her way.