I hate to day it, but David's Bridal and Alfred Angelo are both bridal shops that have a target audience of fat people. Your sister was probably the only human that had been through those doors all week... All the little piggies want classic gowns because they want the retro vibe, thinking they'll look like Katharine Hepburn or some other silver screen goddess. They just look like an overstuffed sausage link in everything they put on. Of course, your sister knows she'll look beautiful in anything so she goes for the more demure and traditional look. She doesn't need to show off her boobs to get attention lol