Legal Advice: Coming Forward About Sexual Abuse From A Social Worker 25 Years Later

I am posting this question on behalf of my partner. 25 years ago, at the age of 12, my partner was put into the foster care system. She went to live with a woman who was a social worker. After living with her for a short time, the woman started to groom and sexually abuse her. This lasted for years until my partner finally became a runaway. It has affected her life in many ways but she has never feel safe enough to come forward. This abuser STILL reaches out to her to “check in” or wish her a happy birthday and every time it happens it is sooo incredibly hard for my partner to “bounce back” from the terrible feelings it brings up. Recently, she finally decided she wants to pursue legal action if at all possible. This woman also abused a boy who was living with her and he reported it. My partner is not sure what (if anything) ever came of that. I’m guessing nothing because my partner still had to go live with her. At the time of the abuse, my partner told her best friend about it. She is able to contact both of them and they would both be willing to share what they remember from that time in support of her story. My question is, what’s the first step? Is it too late? This woman currently has another young child living with her and it’s scary to think of what could be happening to her. We don’t have much money but I’d use all of my (small) savings account to help her with this. Thank you for taking the time to read all of this.