Bride requested I wear something that will cover my bump. I'll be 5 months pregnant! Help!

She said she'd rather not have the attention on my bump vs her special day. Black tie attire. I'm not one to argue, but I am REALLY stumped at how to fulfill this and was hoping I could reverse engineer the use of this sub and get some suggestions (or at least, starters!) I'm yet to find anything that fits both criteria.

Edit: I totally get this sentiment of you all saying I should skip, but I feel not attending in this circumstance would cause more harm than good. The groom is a very close relative, and I don't want to fracture our relationship over this. He agrees that it's irrational, but asked if I could accommodate for one day and save us all some grief. I want to do my best, no matter how crazy it may be. I'll revisit the subject if there's absolutely nothing that would be appropriate.