Should my friend go to the funeral? need some advice?

my best friend had 2 kids with her ex husband, she has recently married, but the ex husbands younger brother has passed away, but her new husband does not want to attend as its the ex husbands family, she is not that close to the family and her and her ex husband parted on bad terms, should the new husband go to support his wife or does she even need to go

My best friend died last week- I cant face the funeral?

Firstly I would like to thank everyone from my heart who replied to my question last week, with such caring and comforting words.

Tomorrow is the funeral and I’m dreading it as it will finally hit home that she’s not coming back. I just don’t know how I’m going to get through- I will be with her fiancee trying to look after him but will be a mess myself.
I’m definately going there was no question of me not going I just don’t want to break down