Pandora, I'm sorry you're hurting and I wish there was some easy answer to your mom's situation.
Sometimes alcoholics do very bad things as part of their sickness. I'd strongly suggest you read around this forum and especially the Sticky posts at the very top. A lot of us have found great relief in local Al-Anon meetings, which are for friends and family of alcoholics to share experience, strength and hope.
Please educate yourself about this horrible disorder as much as you can, and you will begin to see that the answer doesn't lie in doing the right things to change your mom's choices, but instead lies in detaching from her choices with love. You didn't cause this, you can't control it, you can't cure it........but you can save your own sanity.
I'm so glad you found us :ghug3