How to stave off questions about drinking while pregnant

I was at a party. I was pregnant. Someone handed me a half glass of wine, and I drank it. And there it was — the crack of the whip glare. At first I thought I was projecting (my rule was one-ish on a full stomach, with lots of water, to be totally honest) so I turned to the glarer, a friend of mine, who was already a mom.

"You didn't drink when you were pregnant, did you?"
"No," her tone was short and sharp.