This isn't my situation, it's one of my sisters' but I don't know how to advise her at all (and it's also complicated by the fact that she is generally vulnerable MHwise).
When she was at uni she got involved in a relationship with an older man (she was a teenager he was late 20s). His two previous relationships were also with teenage (1st/2nd year) students, also vulnerable (eating disorder/personality disorder/history of sexual abuse/teen mum type stuff, similar to my sister in lots of ways).
She was with him for a few years and he was controlling and violent. sexually and "generally". She moved away when she left uni so she was able to leave him, although it took her a few attempts.
Years later she found out he had another very young girlfriend, another teenager or maybe 20 years old. She felt like she had an obligation to try to protect this other woman, seeing the same pattern, so she went to the police to report some of what he did to her.
Long story short, the police NFA/no crimed all of it. I could go into a massive rant about the way the police treated her but I'm sure you can imagine. They acted like she was crazy. (She has had anorexia for over 15 years but she's not "crazy"). She also tried contacting this girl via SM but no reply.
She has now discovered, after they've been together for several years, that this man (who by now must be 40 or so) and the girlfriend (mid 20s) are having a baby. She's really worried for the woman and the baby. I don't think it would do any good for her (my sister) to dwell on it and if she tries to get involved again it could be bad for her -- he could retaliate, it could have serious consequences for her from a legal/MH standpoint. And more generally i'm just worried that getting back into it all will have a negative impact on her mental health anyway.
I feel like I should know what to suggest or how to help her because i'm a psychologist! But I work in lab... i've never been good at people stuff.
Is there a "right" thing to do here? Should I do anything or just ignore? Is there anything she could do to try to protect this woman?