The cute little halter dress by MILK I bought off Amazon did the trick! A pair of hold it all in knickers, heels and cardigan and I was able to nurse Serena at the table at the reception and the girl promptly passed out so we could enjoy eating without a child to hold/rock etc!
I know it sounds silly but DH and I haven't been on a 'date' for over 2 years now and this was as close as it got.
Just wanted to share.