One of my brother's asked me half-jokingly if I was insane for stopping... the other said "I'm not doing that" when I hadn't asked him to stop. Biggest support I got was from the sibling with the biggest problem of his own (all of us have drink issues though).
I'd ignore her Jeni. Drunk people over-react about anything... keep thinking you are glad those days are over, let them get on with it.
It's all about you now