It was perfectly natural for her to make the errand on her own - it was a quick stop, apparently on her way to meet her boyfriend. Who hasn't done this?
I went everywhere by myself from a very young age, take the bus, whatever. Unheard of today, it seems like. By the age of 15?? Forget it.
Quoted message said:
It makes me want to chain my granddaughter (15 yo) to her mom's leg, or mine....