DD (18) came home sobbing at 3am last night. She'd been round at a friend's house and witnessed the friend being severely emotionally abused by her partner. DD had filmed it in the end to try to shame him into stopping, but he'd just carried on hurling abuse at dd's friend, who was curled up motionless and catatonic with distress on the floor.
Bit of background - dd met friend at 16 when they were both inpatients in a children's mental health facility. DD has a diagnosis of borderline personality disorder, and so does the friend. DD really loves this girl and is godmother to her year old daughter. She's aware that the partner has been aggressive and unpleasant ever since she's known him, but she now describes him as controlling everything this girl does. Recently she's had no way of contacting her friend as friend now has no access to a phone, social media or money, and is staying indoors with her baby all day alone. The partner takes the keys to the flat with him so she can't go anywhere. DD only managed to get in touch with her by contacting the shop below their flat, and getting someone to lend her friend their phone to call her.
The recording on dd's phone shows him threatening to tell social services that friend dropped the baby and taunting her about her mental health.
I'm really, really concerned. I know dd's friend is an adult, but she's particularly vulnerable because of her mental illness. I'm concerned about the baby too. I'm also worried that it's affecting DD who's feeling horribly guilty and conflicted. Friend has begged her not to contact social services or the police as boyfriend has threatened to kill himself if she does.
Would add, that despite all her problems dd's friend appears to be a really loving, gentle, responsive mother to her baby, and the baby seems to be thriving. I don't have regular contact with her but dd has cared for the baby overnight on a couple of occasions when friend and boyfriend have had a (rare) night out.
I really don't know what to do. It's really hard to hear about such a young and vulnerable acquaintance being coercively controlled and emotionally abused, and to know that a baby is being exposed to so much stress. I feel very uncomfortable about sitting on that information and doing nothing.
So I guess I'm asking - wwyd in this situation?