Because it’s hidden, we know it’s there.
Gisele continues to be all secretive about her rumored pregnancy, just like she was the first time around, so it’s basically all but confirmed. Of course, the biggest giveaway — besides all the unnamed sources that keep blabbing about it — is that she’s been hiding her stomach under lots of baggy shirts, which, of course, the nonpregnant Gisele would never do. Sure, her baby bump is her own business, but doesn’t she realize that swathing her midsection in tentlike garments makes it that much more obvious? Or perhaps that’s the point.