TL:DR Should I tell my mum the reason they are not invited to sibling's for Christmas is because of me?
Long story, sorry (and this is the shorter version) - mum was not a great parent - I was golden child in the position of trying to protect the scapegoat sibling from physical and verbal abuse - being hyper-vigilant, spotting the signs and doing lots and lots of fawning/people pleasing. So I was basically the suck-up to ward mum off losing her rag with my sibling. I 100% know my sibling had it way, way worse. Sibling and I have discussed, get on great.
Doesn't sound massive, but I have been having NHS trauma focused therapy for the last 6 months as my fear response/people pleasing/hyper-vigilance is kind of shit. Therapy is ongoing.
I have thought about going NC - but staying more LC due to dad.
Over the summer there was a big celebration - mum, dad, sibling, me and DH/DC all got together for it. My DC (adult) and DH were watching out for me the whole time (checking seating plans, not leaving me alone with mum etc etc). It was OK-ish - but my hyper-vigilance kicked in and I could feel the pain from my sibling who was kind of pretending it was all OK. It was not horrific, but it was shitty - as far as I was concerned. I could not wait to get away.
DH and I agreed we would keep all visits with mum/dad to 5 hours-ish max. And certainly no more overnight stays. And not put DC through that whole thing again (they were fab).
Just as we were leaving my sibling then said to me they wanted to host Christmas for us AND my parents. (I had not realised at this time that parents had already told sibling they were not doing their normal trip to the local hotel for Christmas).
When I responded to the invitation (I prevaricated at the time) I said we would love to come to theirs, but could not if Mum and Dad would be there. It was not something I could put my family through and it was a boundary I did not want to break for myself.
Sibling went away to think about it and came back saying, please come, will be no Mum/Dad and actually better for sibling too - as they don't have the bandwidth for the dynamic either. Sibling spoke to parents a bit later and said we were going to them for Christmas and apparently mum did say "can we come". Sibling said no, not possible with step children/in laws/work. Sibling is happy to be the bad guy in this conversation with mum. They think I will feel differently next year.
DH and I are seeing my parents next weekend. Should I let my sibling remain the "bad guy" for not inviting my parents? Or should I tell them that actually, it is me, protecting my DC/DH and myself which has resulting in the non-invite?
I am churning this over in my head with what to do. My sibling seems to want to pretend all is OK, we are really one happy family with a few glitches. My sould screams no. I think I should say something to mum about this being about me, not sibling. But I am not sure if that is just be stepping in to protect again?
What should I do?