alcoholism: questions about severe reactions?

My sister is an alcoholic/addict who is not currently using needles. I am 46 she is 43. My problem is I believe she may be way over the limit on the alcohol. She "forgot" to tell me she wanted to spend the week-end, did not eat more than a couple bites in 24 hours, drank 2 bottles of wine, and a 6 pack. continually repeated the same phrases--, threw up when she came in (bad food she said) and before she went to sleep as well. She doesn't remember the back somersaults my daughter was doing that she thought were "so" cute Saturday night. She cannot seem to track a conversation, has had seizures in the last 3 months, Is this protracted alcohol poisoning? Or just too much drinking from an addictive personality after the death of our Mom? Btw--she chose drugs and men over her kids and we might fight at how clingy she is with mine-at 20 the college student is allowed to go out with her boyfriend on Saturday night-regardless of who shows up unannounced. If she chooses to take her aunt home, she leaves again. My 23 year old son doesn't have to baby her -- he's a marine and laughing it off, but it's scaring me how she clings to my daughter and I don't think it's healthy for either one--since the sister is supplying pot, which can't be smoked in my house.