It's rude to take away something someone has paid for.
Tawny's teen daughter Ivy is very mature and even bought herself a car, but lately she's been staying out past curfew.
Tawny wants Ivy to respect her curfew.
Tawny tells Ivy that if she doesn't respect her curfew, she won't be able to have friends over.
Tawny takes Ivy's car keys to deter her from going out at all.
Ivy begins coming home at an appropriate time.
Ivy doesn't agree with her mom taking something that she has worked hard for, and runs away from home.