I don't want this to drag on so I will try to keep concise. Also don't have a time machine so any 'well why didn't you...' or 'maybe you should've' doesn't help anyone so please only advice for going forward if anyone has any. Thankyou 
I'm typing this so it reads hypothetically to make sense of it but it's about me.
Couple with three kids between 1-5.
Over the last year the dad has become verbally abusive to the mum. Has spread to being in front of the kids.
At Christmas the couple went for help at gp to try and get help. She gave a change of medication (dad previously on antidepressants for 10 years)
And arranged for mental health team to get in touch.
The mum has spoken to womens aid but the advice was for more extreme circumstances
There was improvement for a while
Dad starting to slip back into snappy spiteful comments, children are aware. They've begun commenting about mummy being sad and daddy being mean
Forward to today.
He turned really nasty on her. Told her and the kids he was leaving and as he left he turned round and spat at her.
The kids did not see that part. He came back.
Anyway. She knows she has to leave. For the kids. If it was just her she would be more than happy to let rip with a few home truths but she's never ever without at least one of the children and won't let them see or hear that. He knows this and used it.
Unfortunately her circumstances are:
Rented house in both names
Works only part time opposing shift to partner
No savings
Bad credit
Can't drive
Nowhere to go
Family local but completely unable to help.
She has nothing to leave with and nowhere to go if she did
Heartbroken that it's turned out like this
The children absolutely adore him and most of the time he does them but since 2 became 3 his patience has all but gone.
What the hell does she do