My questions for you are: what can I do leading up to treatment to help her? What can I do during treatment? And what should I do to prepare for her return?
Look for support and help for yourself, there are good supports networks out there. Al anon for example for the families of alcoholics. You will be better able help your mother only
when you help yourself. We all get sick in the family where there is an alcoholic. The alcoholic has more chance of recovery if family members get help for themselves. They will learn to stop putting there own lives on hold,where they learn not to enable the alcoholic . you will learn to love your mother in a healthier way and not at the cost of getting sick yourself. The treatment centre may be able to help you in that direction.. wish you all the best..