Yes you really put your foot in your mouth, and gave your wife a kick too. I was in great shape when I was 18 too, after having three kids I put on the wieght. My husband never said anything like that to me. She is going to have to do it on her time she will some day. but when you said that I bet she thinks you don't like her body anymore.
My husband is very thin. He knows how you can get hurt by names too, but from the end of being really thin. We have been married for 27 years and love each other for the way we are. But I'm the one that wants a band. He is behind me all the way.