DH and I were helping out a neighbor yesterday (who didn't know) and another neighbor came over (who did know). She called out "Hey, Pregnant Lady! How you feeling?" And neighbor A was like "Woooah! Are you a pregnant lady???" followed quickly by "(DH), YOU THE MAN!"
Another funny response was a family friend said "Yea I knew it, you looked a little bigger!" when I was 12 weeks and not showing at all.
Any funny responses you ladies have heard?