I want to start by saying that this is not really an AIBU, I have posted here for opinions as there is usually a lot of traffic.
Last night things blew up with my mum - to the point where she has blocked my number and social media - and I am now considering going NC/low contact with her.
To give a bit of background - my mum had a horrible childhood (her father died, mother was an abusive alcoholic etc) and then growing up she never broke this cycle. Even as an adult she bent over backwards for her own mums approval which she never received and after my gran died she had a huge family rift and doesn't speak to her siblings anymore (neither do we). When I was growing up my mum could be an incredibly generous person and always sought to give us experiences that she never had however, she could also be very unkind and often wouldn't talk to us (myself and my sibling) for days if we disagreed with her or she perceived any wrong. She was/is even worse to my dad.
Despite all of this I maintained a relationship with her because she's my mum. There was never any physical abuse but there was definitely emotional abuse, gaslighting etc.
Brining it to more recent times my grandparents on my dad's side have had a horrific time recently. They are both in their late 80s and my gran has recently been diagnosed with dementia which is not going well at all (she needs someone with her 24/7 but SW still have not started their care package and, despite being a flight risk/refusing medication/physically hurting others/trying to kill herself/being unable to wash herself and frequently losing control of her bladder and bowels, she does not meet the requirements for residential care). We have also found out that she has cataracts and they are unsure whether to operate given her medical history and current state. My grandpa is in hospital having fallen down the stairs and breaking his hip, he is also going deaf.
My dad has been running himself in to the ground to look after them. He does have a sibling and although they do bits and pieces it is definitely not an even split in duties and they often phone my dad to deal with issues when it gets "too difficult". With my grandpa in the hospital my dad has been staying with my gran because what else is there to do? She cannot be left alone.
Throughout this whole thing my mum has been telling me dad that he needs to stop doing what he's doing, that he should be at home, that looking after them can be his sibling's job etc. She has become quite horrible and somehow seems to make the situation about her and how it is so difficult for her because he isn't at home as often.
I do appreciate that is is a trying time for everyone but I'm sure my dad would much rather be at home and cooking dinner than dealing with everything else he is going through. He is completely deflated 24/7 and you can see how much he is struggling. He has confided in me that there are small points where he hopes (although hope is the wrong wors) that my gran will just pass peacefully in her sleep one night because you wouldn't let an animal go through what she is. I have told him that he needs to be firmer with his sibling and they need to do more but he is worried that if he does this and they don't step up then the only people who suffer are my grandparents and he couldn't live with that.
Fast forward to now and my dad's sibling refused to have my gran at their house overnight for NYE because my gran was having NY day lunch their and it would be "too much" (despite my dad spending every waking, and sleeping, moment with his mum since Tuesday and having barely eaten or slept as a result). This meant that my dad spent NYE with my gran at her house as my mum didn't want my gran in their house because "she's a danger".
My mum then had several offers to spend NYE with myself or my sibling, which she declined and started to martyr herself. She then proceeded to take my dad's house keys off of him and told him he had obviously "picked his siblings happiness over hers as he wasn't forcing them to take my gran".
Last night she sent my sibling's future in-laws a message saying similar to above. She then messaged in the family group chat, purposely ignoring my dad, saying that tomorrow (today) was the start of her "new life". Both my sibling and I called he'd out for her behaviour and I told her that she was being toxic and her behaviour was uncalled for. This is when she disinvited us all from a lunch today, said it was all my fault, and then blocked me. She then proceeded to message my sibling to reinforce that it was my fault (which my sibling does not agree with and shares my view) and tell them that her "new life" was her starting things as a single person because she was done with how selfish my dad was being. She also proceeded to post the same type of things all over social media because that is what she does.
My dad just wants us to make things right again, and I can see the strain it is causing him on top of everything else, but I cannot. I have spent almost 30 years of my life putting up with her nonsense and the minute she doesn't like what you say then this is what happens. She desperately needs therapy to deal with her past and try to find better ways of dealing with things but won't.
Would you go NC/low contact in this situation? I appreciate that this is a long post and I apologise, there was/is obviously more to unpack than I realised and I could probably do with therapy too by the looks of it.