I think she's in a tough spot dress-wise. It looks like she's gained a lot of weight in the chest, which can be tough to fit. But the worst thing you can do in that case is to wear something tight and strapless. She should have gone for a dress that had a silhouette like that of the blue grocery shopping dress above, but with an empire waist taken in a little between the bust and her belly to give some shape. Or something with a v-neck or a scoop neck. Anything but tight and strapless.