Welcome to SR... Im glad that you found us.
Boy, your post rips at my heart hon because there really is nothing you can do.
I know that is not what you want to hear, but you Mother has to want soberity otherwise nothing on earth will keep her from drinking. Its a disease hon and just like any other disease its progressive. It does get worse.
What you can do though is get some help and support for yourself. I personally use Al-anon and it is working for me... I learn there the tools to use with Alcoholics, I learn about enabling and what Im doing that is not helping the situation and Im with people who really do understand.
Posting and reading here can help as well, getting it out and talking about it somehow makes me feel better. Keep posting and reading... Your not alone in this.