When you serve punishments, make sure you are going to be able to carry them out, if your struggling to, then maybe it was too harsh in the first place, the punishment should fit the crime & the context. Next time (cos there will be one) think about how you are going to handle the pleas etc without backing down. Backing down is worse than an easier sentence seen through. Good Luck. Have you asked her why she likes drinking? It could help her see why she is, and figure out that its not that cool.