DH's best friend from childhood is a bit of a cad (to put it mildly-unfaithful to his wife, a bigot, not racist but l....etc). Let's call his wife Mags
DH has distanced himself over the years but our paths cross a few times a year due to another couple who are lovely but tolerate the stuff he says.
Best friend's wife "Mags" has always been cold towards me even at the beginning of my relationship with DH when DH and friend were still close.
At our last contact with Mags she was her usual cold self. Ignoring me/ drowning me out when I started talking and boasting about a BBQ she was hosting and that everyone was invited to the next day as the "after party", a BBQ I wasn't invited to. They then invited DH without me 
by phoning him and asking him to drop in after he'd finished work while I was at home with the children. Everyone else's kids were there.
I've always felt life is too short to waste time trying to impress people who are mean. I learned that at primary school FGS. I barely have time to see the people in my life who are lovely!
However, nice couple continue to invite us to events with Mags and her DH and we are running out of excuses.
Should I be honest with nice couple (whose loyalty is to Mags and her husband- holiday together, bridesmaids to each other etc) or do we just remove ourselves from the group entirely?
I feel like I'm 12 again and I don't like it ..
DH convinced Mags jealous of me for various reasons but although my ego loves that suggestion I'll never really know why she has disliked me from the moment we met....