She's not going to want to get sober until she hits bottom. She has to want it for her. You can try to make her bottom come faster by threatening to call in help, or as sky mentioned, an intervention. If the family sits down with her and tells her of the fears, and that unless she gets help, the family won't do anything to enable her. It's a terrible situation being the loved one of an addict, because the addict has to make the decision for themselves. That leaves everyone else feeling powerless, which you are. Let her know that you love her and that you're worried about her, and ask her to get help. Let her know that you won't help her satisfy her addiction, and then stick to that resolve. Let her know this is a life and death situation, and you don't want her to die. Most importantly though, if she doesn't get help, know that you did what you could and it's not your fault. Best of luck to you, and thank you for sharing.

~Rayna