I'm a bridesmaid in a wedding this summer where the bride is pregnant. She wants a ballgown, preferably one that doesn't show her belly. We've now been 4 different boutiques (and she's visited an additional 3 others with other BMs and her mom) and she has yet to find one that meets those requirements. Drop waist is obviously out. The ones that have a natural waist will likely be too tight and make her look very wide. I've tried steering her in the direction of empire waist chiffon, but she really wants a ball gown. Any advice?