Wrap dresses are often advised for busty women. The fashion advice-ey places say they are "universally flattering." Eh, they sometimes fit, but I wouldn't go so far as to call them universally flattering nor universally fitting.
I like this dress, but I definitely wouldn't call it perfect. Especially with the amount of cleavage it shows. Cleavage- the all-familiar issue. You can wear a cami, but that's hot and icky in the summer. And they tend to roll up from my hips.
Look Ma, no cleavage!
My solution? A lace bandeau bra. Over my regular bra, obviously. And I usually have to buy a large or XL to fit my bust in. But they are absolutely perfect for layering without bulk or discomfort.
Dress: Locally made from organic cotton :-D
Lace bandeau bra: Free People