In that moment I just smiled, since crying would be embarrassing, and thought about how clueless children are about hurting people's feelings. I didn't dwell on it too long, since he followed the comment with, "But now she is not fat!"
In all honesty, I can't be mad- I really was as big as a house. And I really have 'literally' worked my butt off!
(Picture from 2003, after 2.5 days of labor with Jacob and finally getting some drugs, I could sleep)