Just for the record, because she commented crossly on my previous post, I don't think my mum has a drinking problem.
She does like the occasional glass (or two) at parties. (And that was more my point, because if she was at a party where the wine ran out I'm sure she would have a glass in front of her.) And she can hold her liquor and normally stops when she's had enough. (If you want to see someone get twinkled up you should see my Grandma when she's had a couple.) And I probably shouldn't have implied more than that, really.