I was asked that once. I replied something along the lines of, "I'm not." The woman was an acquaintance and boy was she mortified. I think that the dress I was wearing at the time was not the most flattering, but you'd think someone who knew me somewhat would realize that it was fat not a pregnancy.
Some women you can tell without a doubt, some not. If it isn't blindingly obvious I don't say anything. Actually, I usually only say something if I know the person (which means it's usually common knowledge.)





