To be fair, I'm sure I'd do the same thing. I naturally always have a stomach that looks like I've just had a lot of pasta even when other body parts are quite slender and toned. Just like me, Lily seems to hold weight in her lower stomach and hips and I find myself wearing baggy clothes because I hate the way it looks.
That being said, unfortunately a baby bump is more socially accepted than wearing a body con dress when your stomach is poking out sans baby. I'd wear the tit out of bodycon dresses if I knew I wouldn't get weird stares or people thinking I'm pregnant when I'm not but I don't have the confidence tbh.
I know it's easily said "why is she hiding her body, she looks fine" but when you yourself don't feel like it the last thing you want to wear are tight clothes. (I'm sure in a few years I'll look back and think "I should have worn skimpy dresses more often" but oh well)