Can't sew bra cups into wedding dress?

Hi all,So let me start by saying I’m a 32G bra size. My dress is gorgeous but has an open back underneath a sheer layer of beading. Everyone at the bridal salon told me

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Trouble with underwire bra cups on dress?

LET US SEW, Here is d list of material I used of my wedding gown u requested for tulle-50yards,cord lace-2yards,bra cup,lyning-15yards not d regular sponge

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How to Sew a Built-In Bra (With Cups!)