My partner's brother married an awful woman last year
No one in the family likes her or the way she treats people or her partner. She knows how I feel about her but the rest of my partner's family don't like to say anything to her face. A few months ago she did something bad and my partner called her up on it. Since then she won't speak to him or allow him in their house (of which his brother of course owns half).
She hasn't attended any family events over the last few months for various reasons/prior engagements/excuses, and I haven't seen her since January. We may have to see her and be civil at Christmas, however my partner won't apologise and we can't stand her or her gossipy, spiteful nature. I'm being told we pretty much have to invite her to the wedding for the sake of keeping family peace/his brother's sake, but it's our wedding, and we've already made a lot of compromises to keep his family happy.
I feel if she was to attend it would be very awkward, and I'd be conscious of her being negative on the day, shooting looks, bad mouthing our choices, etc.I feel trapped and don't want to cause upset but I know my partner's family will be annoyed if we exclude her (I already received slack for not inviting her to my hen do!). The cost per head isn't cheap either and overall we're just unhappy and uncomfortable having her there on our special day.
Any advice would be appreciated on where to go next on this x