None us us can say for sure that this isn't just a phase, but there are definately signs that this is more serious..the behavior has continued and escalated despite multiple contacts with the law and/or school authorites..compared to her drinking peers she has still exceeded "normal" behavior. She is an adult and if she's paying, letting her go is not really within a parents control..as the mom of an addict/alcoholic..my suggestion would be to just let her really feel every single consequence of her behavior..whether it be jail, school probabtion, you removing your financil support, whatever..consequences make people motivated to change behaviors..this sucks, and it's really hard when they are this young adult time..my daughter is 19 now and in school..we pay for her sober living and some expenses..it's a fine line to walk and you are just at the beginning (hopefully it doesn't continue) but if it does alanon is a real life saver..