I need some advice regarding a break up!!!!!

Im explaining this as briefly as I can:

My mum and dad were together until I was 3. I also have a brother who's 1.7 months younger then me.(same parents)

My dad was abusive, he would say he was going shop then come back 6 months later. He cheated on my mum and she has fake teeth because of hi through violence.

Anyways, my dad moved on and got married within a year of this breakup.

His wife is lovely. She's a great cook and always been kind to me and my brother.

They share two daughters together who are 10 years younger then me.

Recently, his wife has been telling me she wants a divorce. Now in their culture that's not a everyday thing.

The thing is, she's scared. My dad is very angry you can't even talk to him about something without getting angry. That's if it's a bad thing anyways.

My dad has been known to be texting younger women on insta, tiktok... you get the picture.

His wife has had enough. He never shows his phone and at night he keeps the flash on so he knows if she's touching his phone.

She's given him chance after chance but clearly he can't keep his 54 year old hands to himself!!! I am so so disappointed. My sisters are 12 and 16 it's unfair for all this to be going on.

The problem is, my dads wife's family live in turkey. We all live near London but not together. I feel so bad for her. She's asked him to move out and get a divorce but he doesn't say anything or he gets angry!!!! She feels so scared. He isn't a bad dad and he will never NOT see his children but why is he doing this??

She has nobody over here it's not easy. That's why I'm on here looking for advice.

He won't agree on a divorce yet he won't do anything to stop the bad things he is doing. My sisters can't move to turkey because they are doing their gcses and their life is HERE. They were born HERE. Ahhhh I've tried talking to my dad and he said he's done nothing wrong. I don't think he's met women but talking to them isn't a great idea.