<human>: Can you provide a brief rundown of the text in within 3 sentences?

This has been going on for quite some time now and I'm concerned for my friends (let's call her A) family, as well as her. A's mother, let's call her O, has been emotionally abused and threatened into giving A's sisters son money. Extortionate amounts. At one point O was scraping by to live. 

The abuser in question, let's call him Asshole, has been in prison, does drugs, has a toddler son and an awful relationship with his girlfriend. They will often get into fights infront of the baby.

He will go into O's house demanding money, swearing at her and has smashed a door through before. He's also hit my best friend. I also think O is paying his bills. 

I'm wondering what kind of advice to give A. As her mother wears Rose tinted glasses and gets on with it, as well as being scared of Asshole. From restraining orders to police involvement? Maybe even domestic abuse? 

We're in the UK as well, if this helps.
<bot>: Best friend's mother is being emotionally abused and threatened for money. Want to take action before this gets out of hand.