So nc for this and apologies if its long and or confusing. My DH has three brothers, all fairly close in age and live locally. One of his brothers is with his wife a long time and they have teenage kids. A few years ago his wife had an affair but he stayed with her. Since then myself and my DH have not spoken to her as we were very hurt by what she did and my previous husband cheated on me so it brought back bad memories. She did have some relationship with other family members but nothing really now.
My problem is over the last couple of years BIL has pulled away from all of his family. They no longer attend any important family gatherings, birthdays, funerals etc but this was the first year BIL and their DC did not visit PIL on Christmas night. He visited it earlier in the day with them. SIL hasn't visited at Christmas since the affair.
I get on with my other BILs and SIL and we are angry that BIL is choosing to do this. Being honest we don't really want a relationship with SIL but it looks like in order to have BIL in our lives he comes as a package deal. How can we navigate this? Do we just suck it up and get on with her for BIL, although I don't think I could be that fake to somebody I actually despise.
This is a very short version. Its going on seven years now.