What to wear with this dress (wedding guest)

[PinkDaffodil2]

I’m invited to a wedding in a couple of weeks - dress code is black tie for men, long evening dresses for women. I’ll be 20 weeks pregnant and have taken ages trying to find a suitable dress to wear and think I’ll just buy this one.
Maternity dresses are too big, but none of my current dresses quite fit (and none are really black tie appropriate anyway!).
However I’ve no idea for jacket and shoes. I haven’t been to a wedding outside of summer in years. I’m not sure how much we will be outdoors - it’s at a nice hotel / venue down south, bride and groom are putting on a bus to and from the wedding venue from the hotel we are staying in.
Any suggestions?

Bonus points if I can just get the rest of the outfit from SHEIN - then it’s easy to return if the dress doesn’t work! I’m usually a tall slim 10 so hoping this style will fit over my bump ok. I don’t really have anything nice in stock.

Maybe a warm wrap which picks up the colour?

Sorry I'm not much help, but that's a lovely dress OP!

@MrsDrudge i thought something similar but I’ve no idea what colour to go for! So and at this stuff x