Black dress by uptown size medium

I have worn this dress once to a club outing with friends. I normally fit mediums pretty well but I noticed when I wore this dress my cleavage wasn’t big enough. This dress has a deep v cut and is all black with gold buttons on each breast my only problem is I cannot fit this dress. It looks dashing but I believe I don’t have enough cleavage for this dress. The material is polyester silky.