Help... * not TTC related* but I need advise.

** Nothing to-do with TTC or babies** I don't know who else to ask... and my family needs help and you all have dome amazing advise! My sister in law is doing cocaine and it's becoming a very very severe problem. apparently she's done it for a long time but was more recreational. now people can notice it. she's up until 10am every day wired. her boyfriend is supporting it.... we need to talk to her. her mother doesn't know and is to "blind" to see it. we're trying to come up with a way to tell her we know and we want to help her. she's the type of person that she doesn't care what anyone thinks. if she doesn't like what your saying then she will get all defensive and it will blow up into a major thing...we're trying to avoid that because we don't want it to get any worse and she leaves the house and becomes a super bad drug addict. she's 22***** my sister in law is doing the cocaine! my husband, my other sister in law and myself are trying to find ways to talk to her about it.*