I continue to suspect that genetics play a key role in relation to a drug addict's drug of choice.
She obviously needs some proper medical attention, but choosing to mock or judge her will only make things worse - just like every other drug addiction.
Also, I think it's vital that whatever initially caused her to go down this path of self-destruction is thoroughly addressed.
Furthermore, no one should expect her to stop her habit immediately. I'm sure it took her awhile to become so physically dependent and psychologically addicted to ethyl alcohol, therefore, it will most likely take quite some time before she sobers up for good.
I really feel sorry for her. Hopefully she'll receive the help she needs, and none of the prohibitionist/abstinence-only ostracism which continues to be all too common. Even though her drug of choice is legal, she - and other alcoholics - are not necessarily exempt from this sort of treatment.