This is just my opinion....if my friend asked me to stand for him at his wedding ,he would probably know that I would want to wear my kilt.If I said yes and he accepted the idea of a kilt but his soon to be wife didn't,I would bow down to the bride ....it is her party...If I was just getting an invite to watch the occasion,I would wear what I want,and it would be a kilt and if the bride to be still whinned about it.....I wouldn't attend....thats me...cheers