Yes, Janine is right. I had an uncle who was 54 years old by the time he managed to drink himself to death. His memory was shot to the point where he did not recognize his own son, physically he was a mess, his liver, well, I'm sure you can imagine the state that was in among many, many other things.
I would never dream of telling a person NOT to help anyone & everyone they possibly can, just make sure you are being realistic regarding the possible outcomes. If it is doing more harm than good to you & your immediate family both physically, mentally, emotionally, monetarily, then you'll need to back off as you've got your own battle right this minute that you need your strength for, right?
I'll be thinking about you, Mama, & I wish you the best.