Namechanged have posted about in law situation before so bavkground may familiar.
In a nutshell dh’s sister fell out with us a few years back widely agreed by most that it was her issue not ours she became abusive about us and had lots of arguments with Dh until he went nc and from this so did I. Following that his mother very much took her side eg not visiting our dd on Xmas day as she didn’t want her dd to be upset And shouted out me when I was pregnant blaming me for rift between her 2 dc even though I was encouraging Dh to sort things out for sake of peace, lots more incidents I finally went nc with his Mum last year.
Mil sees dc every fortnight for short visits with Dh.
Anyway his sister (nc sis) dd wedding is this year we including our young dc are invited. Our dc have met his dn a few times but never his sister. I’m dreading the thought of going- his sister is can be volatile and would hate our dc to see that plus would feel awful if it spoilt dn special day. Would it be terrible if I said Dh best to go alone he was very close to dn as a baby and feels he really should go.