Can anyone suggest styles of top and/or dress bodice types for spring and summer that would be both very modest and flattering for a woman with a very large bust (H or I cup)? In winter I do a lot of layering to cover up but summer is more difficult. The climate here is very temperate and wet, so it's not a "blazing sun" problem so much as a "warmer weather, stuffy buildings" sort of issue.
Nevertheless, I do wear short or 3/4 sleeves and I would prefer to be able to wear either one layer or a layer and a light cover up. My big concern is that I want to make sure I have full coverage at the bust -- no cleavage, nothing tight, nothing that's going to dip or pull over the bust and draw attention to it, nothing that has a risk of slipping (ask me about that wrap top I wore once. Or, actually, don't). Absolutely nothing sleeveless.
In the past in the summer I've often ended up wearing tent-like blouses and tunics in order to fit over my bust without pulling, but since my bust is at least four sizes larger than the rest of me, I've always end up with a really sloppy fit at the neck and waist. For age appropriateness, I'm 38. My workplace is sort of smart casual/business casual depending on what you're doing that day. Personally I tend to stick to a more business casual level of dress because I feel more comfortable knowing that if I am called into something unexpectedly I won't feel underdressed.