I am one of four bridesmaids in a COVID-delayed wedding. The dresses were purchased back in January. I need to figure out how to make mine work, specifically the bust. The dress has no boning and its back is a low V. I am a 38G and can’t go unsupported.
I have spent good money on unworkable support solutions. I had a seamstress put some bra cups in...they did next to nothing. The adhesive "bra" I bought feels like it wouldn’t hold for 30 minutes, much less several hours. I have considered the pricey “Misses Kisses” product, but I need support, not super low plunge. I'm leery about the Kardashian "taping the boobs" thing.
Most recently I bought a low back corset-style bra. The support is pretty good, and I think I could wear it for several hours, but...the back hooks poke out.

Yes, I know I should have thought about this when the dresses were chosen, but I was told that bra cups could be sewn in, and I was somehow under the impression that the dress had boning. I should have asked more questions, I guess.
Has anyone dealt with this successfully? Any advice? Please share! TIA