I've Nc'd so as to not out myself
Long story short, I have one brother and parents had a very ugly divorce a few years ago. Me and my DB have always been extremely close, much to SIL's displeasure. Despite me providing regular child care we avoid each other. I am not allowed in her house if she is present and if I keep the kids, she leaves in a taxi separately before I come and then my brother will follow on, when I arrive, in the car.
He visits me regularly (around once a fortnight) and we simply don't discuss her or our parents which works fine and so we've remained just as close. She is also physically abusive to my DB which we don't discuss (I have tried, he knows I know and am here for him but no point in me pushing him away).
Wedding is in 8 weeks. I am totally against it and feel with her regularly beating the crap out of him I am justified in doing so.
But. He is my DB. I love him with all my heart and he has made it plain to me how important it is for me to be there. She has said my DF is uninvited to the wedding (after some made up slight) and my DM is genuinely too ill to go. We have very little extended family so in short, if I don't go he will have no-one from his side (BM and groomsmen are her DBs).
AIBU to not go at all and take my DF out for a nice dinner or something instead or should I suck it up and go support my DB? And if I did, would it be awful for me to go to the ceremony only and not the reception/party afterwards? In the nicest possible way, my intention with this thread it only about attending the wedding. I do all I can re the abuse but really don't want a discussion about it, I've simply put it in to justify my reasons for not wanting to go.