WHAT?! Your sister doesn’t want her own nephew to “steal the limelight”? Unless this is a drip feed and you’re about to add that you’ve already bought his outfit and it’s a a white dress and veil, you aren’t in any way being unreasonable.
I cannot imagine saying such a thing to anybody, much less my own sister and much less when she was pregnant after four miscarriages.
Your sister is a spoiled bitch and I echo others saying to just call it now and say that because of her rules, you’ll have to take a rain check due to the fact that you’ll have an- at most- a six week old baby and that they, pretty famously, need their mums with them at all times.
I apologise if someone’s already asked this and you’ve answered, but where are your parents in all of this? I’ve got a sister who is the youngest and in true, cliché youngest child style she is pampered and indulged by my parents something rotten (and was quite a pain in the lead-up to her own wedding). However if she had pulled something like this about one of her newborn nieces, my parents would have told her to get a fucking hold of herself.
As I say my sister was pretty badly behaved in the run up to her wedding, but even she wouldn’t have pulled this. She’s besotted with my and our brothers kids, having a brand-new one at her wedding would have been welcomed.
Who are these awful fucking women who think that their weddings are an opportunity to be as badly behaved as they like and demand the most unreasonable things? I mean your wording says it all really… it’s “all about her”. No mention even of her intended spouse. I bet even he is hardly factoring into her thinking.
Tell Princess Tippytoes to get to fuck and enjoy the day doing something less tedious with your husband and new baby.