I have changed my regular posting name because I want some advice based on what has been happening and what has been said without changing information and this is very identifiable.
I realised very early on that my MILs behaviour wasn't normal, she is very highly strung and irrational and a master at twisting things or just plain making things up. I believe she is a classic narcissist for many reasons: things must revolve around her or she gets upset, she plays her sons off against each other, her husband is completely enabling of her behaviour (or she makes his life a misery). She is very caught up in how people think of her - that her friends think she is wonderful, so generous etc. and what they think of her husband and sons (how badly they treat her - though I am never sure if the constant 'my friends think you treat me terribly' line is made up).
Today there has been another in a long line of outbursts where she has accused my partner of being jealous of his brother's Christmas present. It's not true - he went to help her pick it, encouraged her to get the more expensive version and basically thinks she is free to spend her money how she wants. She said how her other son deserves expensive things because he has been so good to her. He asked her not to be hurtful by saying that and it turns into him being madly jealous in her eyes and she becomes so irrational.
She has been shouting and screaming at him tonight as she tends to do on these occasions as well as phoning and texting me to tell me how hurt she is, what an awful person he is, how he twists things. Having been there on numerous occasions where she has been spoiling for a fight I know it is her twisting things and I want to know how I can point this out to her without escalating the problem. I have a sinking feeling she will never accept it and I am fighting a losing battle but for my partner's sake I want to try.
My current strategy at the moment is just placating her e.g. 'I know that was a nasty thing to say, but we all say things we don't mean when we are angry don't we?' It is patronising but I am trying to get her to see things from his side or admit fault, which I know she will never do.
Usually he gets angry and joins in the argument, over the years I have talked him down a little and asked him to think about what he says knowing she is storing up ammo against him. She winds him up to such a degree I understand why he finds it hard to hold his tongue though. Sometimes he gets mad, but he apologises like he did today but this seems to make her worse. She is spoiling for a fight and goes into a rage when she realises he is not fighting back.
I feel desperately sorry for him, he has had years of her telling him he is good for nothing and will never amount to anything, threatening to throw him out when he was a teen and cut him off now. When his dad was in ITU after a life-threatening accident she threatened to make sure he would never see him again after one row, he came home and wept because he knew she was nasty enough to stop him visiting. I hold her completely responsible for his anxiety problems and low self esteem. He does not want to cut her out of his life because it would mean not seeing his dad (his dad would never go against his mum).
I'm sorry for the epic post but I am at the end of my tether with her. My mum was visiting tonight and saw my MIL accuse my partner of saying and doing horrible things. My family dynamic is nothing like this. I am at a loss to understand or explain it to them. My parents just don't understand that a mother would say or do such things so I am constantly having to try to explain it is her and not my partner at fault. As of tonight we are barred from the family Christmas, she will expect this to be forgotten when she wants, I feel like making other plans and telling her why.