Thank you for your words and prayers for your sister and her friend.
I gave up drinking nine or so years ago. Just saw too many people around me ending up with too many problems and I had my own due to frequent excessive drinking. I was lucky because I could and did make a simple choice to stop. I have no idea if I qualified as an addict and don’t care. Giving it up was the right thing to do and I do not miss it at all.