That girl is lucky she wasn't killed. What in the world was she thinking? And what was the "family friend" thinking? People can be such idiots!
When my kids were young teens, they would frequently ask for & receive the keys to my car. The purpose was always to retrieve some item from the locked car, or to put some treasured posession away so it would not be left behind. Adult supervision was not necesary for this errand.
We would frequently go on day trips and multi-family outings. Cars were used as mobile storage lockers as well as for basic transportation.
Never once did a child attempt to drive a car.