Annie, here's the best advice I ever read. It was from a book on picking the most flattering styles for your body, after you used a ruler to meticulously determine where you were bigger than typical, smaller or just typical or perhaps balanced. I wish I could remember the name of it.
It was for every feature of your body, be it broad or narrow shoulders, large or small bust, and on down the line. She gave suggestions for emphasizing or diminishing a feature with no judgement, so we could decide. Like Mae West and Dolly Parton always emphasized their large busts. She left it to us to decide how we wanted to interpret our shape and what to feature. Best advice I ever read.
That said, I do think a large bust would be noticeable in that dress. It also depends on the shape of your bust, it's sagginess
and what lies beneath, i.e. the Belly. On me, I'd anticipate it resembling 1960's maternity wear. Not a look I want. It also looks very much like my Favorite dress from my teen years, except it had straight sleeves and a little pinafore apron attached. I loved that dress back then.