Since when is it so bad to have to walk 3 miles to get home...
Where I live 11 and 12 year old kids have to go by bycicle to school for like 3 to 5 miles if they don't have a highschool where they live. Parents don't drive them around everywhere. Also there are no schoolbusses.

She should have turned around to pick her 10 year old up though, but to put her in jail for this? That seems to be a bit over the top.