@Mintypylonsfryingsurplus
Thank you for that advice I do agree! When I mentioned to DH that confronting his B is not a good idea he said he wants to stick up for me and show the rest of the family that we have done nothing wrong.
I told him to leave it but he upset that the rest of the family are now not contacting him at all. I feel so sad for him. I think he even blames me a little now for not just putting up with it all gor a quiet life!
BIL now ramped it up by moving on to mutual friends. I know a few of them will keep out of it and say its mot their business, but he fawning over them with promises of hosting gatherings and duch like where we are clearly excluded.
Some people really are poison.
Couple of things here OP. Your DH doesn’t need to stick up for you with a confrontation to prove that you have done nothing wrong to the rest of the family (that approach will set BIL off a Catherine Wheel) - it will be futile, stoke the flames and you will both be worse off.
Tell your DH that he is not to do this on your behalf - that you are 100% confident and capable of protecting yourself with your NC / LC / grey rock technique - actions not words is your approach.
I suspect though that you are correct that your DH will be unsettled with this strategy and “blame” you for not doing the usual put up and shut up.....because this is all he knows - he is scared of his bully brother and doesn’t know anything else. So reassure him that you will all be fine well out of it. If you are calm and confident then he will either grow with you or tolerate the shit alone.
With respect to mutual friends - again don’t rise to it. Sounds like he is almost demanding your attendance at his events by inviting mutual friends putting you in a situation where either you look a sulky twat for not attending or you do attend and he publicly humiliates you.
Don’t go. Host your own stuff with these mutual friends if you wish - get in ahead of his dates that would really piss him off.
Don’t worry what he says to them - they know you and they know him - they already have their opinions formed. If they do bring anything up - play dumb, don’t engage, change topic. If they are persistent might have to shift the gears on that friendship for a bit.
Honestly once you detach from BIL’s shenanigans - you will be able to sit right back, pull out the popcorn and observe what a total pantomime it really is with all the predictable characters and everything playing out the same each time. It’s v empowering to be in the audience.