I don't think the fact that she's so slender post birth indicates she didn't eat properly while pregnant. Some women are naturally thin and their bodies just snap back. Others have to work harder. Others use having a kid as an excuse to put on 50lbs and never workout again. If you have any self-esteem at all, seeing this picture shouldn't make you feel bad about yourself. If you didn't look like a model before you had the kid, your husband isn't expecting you to look like a model 4 days post-kid, so calm down. I sadly think this has a lot to do with many women not wanting to put in the effort it takes to be fit and then feeling like they need to slam women who do to show that these women aren't nearly as good wives/mothers/workers because otherwise they feel like they're acknowledging they're inferior. Men are different in that they acknowledge when they're not in shape or someone is in better shape and it's not a competition or an indictment on other areas of their lives. If I ever have a kid I don't expect to look like this 4 days post baby, but if I do, I'll be sure to post selfies.