I think you handled it well. I love/hate Facebook for the same reason.... world is too darn small. There could also be a possibility that M won't even see the wall comment and associate that you did/didn't answer it, there are a lot of people that write on my wall that I take my sweet time responding to. You could also change settings that others can't see your "wall to wall", so even if you answered, she couln't see it anyway
I hate the questions too, even though my DD is not my Facebook friend, I have my family who doesn't know mixed in with people who were there with me in the hospital, B-dad's best friend, and general other people that might remember that the last thing they heard about me was a rumor that I had gotten pg. My standard answer to the kids question is "DH and I haven't started a family yet." It's not a lie, nor does it deny my DD, which makes me guilty as heck
