I'm same age as the brother. (Well I turned 20 on the 22nd, but close enough!) As I mentioned before, I have also torn ligaments in my ankle and the consequences will be lifelong.
I was curious about how OP's parents would react due to comments about apologies, bills, making things up etc, so mum and I read through this thread together this morning before she went to work (I'm still on school hollies.)
She literally went white. Her response wasn't even about the brother, she said if this was my brother and I, her fear would lie with me and the grandchildren, living with such an incredibly dangerous man.
Her words:
If he could do that to a kid, soon it'll be okay to do it too his wife, and soon it'll be okay to do it too his daughters.
OP, I agree with SGB too. This is also what my mother said, people don't escalate from normal loving husband/father to permanently damaging someone and sending them to hospital.
Please think of your daughters. very much doubt they're as forgiving of their father as you are. They will be afraid.
To whoever said they need to make up because of the kids: That's just horseshit. Having someone like this out of the house gives them breathing space, not trauma....Like seeing him rip the ligaments in their uncle's leg because he had a tantrum, for example? That's a trauma.
OP I feel sorry for you. More so your kids. So under his thumb you think him bringing you a bottle of wine is such a kind thing to do. Remind's me of women who are so happy their abuser bought them a bunch of flowers.
And you're delusional if you think your parents will ever allow him near your brother or them again.