Hopefully when you realise how little she actually cares about what you want it will give you strength.
Reminds me of a story I heard some years ago where a MIL was insisting that her son and his wife come for Christmas every year.
They had done this 3 years in a row and the husband was saying he couldn't go against his mum.
Wife was feeling increasingly pissed off.
Anyway she heard from her SIL that they had always stayed at home as children as her mother wouldn't entertain going to her MIL at all!
Wife was very pissed off and had had enough.
On the 23rd of December she packed up her two children and drove to her parents, a couple of hours away, whilst her husband was at work.
She told her husband when he called she wasn't pushed if he joined her and the children, and actually it was her preference that he didn't!
She told him she thought the marriage was likely over as she had had enough of his mother.
He arrived some hours later at her parents house and it seemed to be the wake up call he needed.
Nothing quite like being told by your wife your marriage is likely over because you are a wuss.
It wasn't plain sailing afterwards but they moved house within 2 years and their children starting school.
Through her selfishness his mother lost out big time as he was her favourite child.
OP, don't have your family life dominated like this.
Tell your husband straight that he either sorts it or you are going to have to sell up and move house.
You will bitterly regret her unreasonable intrusion into your family.
These years are very precious.