Your story brought tears to my eyes. My sis is still drinking herself silly and tough love hasnt worked either. You see, the problem is that as long as there is one person who will listen to her and help, nothing changes.
I too dread the day. I can see it coming and god help me if it does. I feel your pain but always remember you have no control over anyone, no matter what they do to themselves. None of it is your fault, you tried. Its such a sad thing this, in fact so horrible to see someone you love hurt themselves so badly. I figure once this has finished maybe, just maybe she will be well enough to make it.
Love to you.