I had no intentions of posting this here, or talking about it anywhere but after reading threads and receiving such helpful, kind feedback, I think this may actually be the best place to talk about this.
(This thread may have to be moved to survivors of abuse but I wasn't sure because I think it fits in psychotherapy too).

I want to be completely honest with my T, I have a lot of respect for her and I hate myself for keeping this secret. I feel guilty, like I'm lying to her and I hate it considering my T is really compassionate / understanding.
Long story short this comes down to the three rules of therapy, I'm breaking one of them and if I tell her I know she'll not only be disappointed in me, (she got upset/angry/disappointed with me for not opening up about how I felt about food - possible countertransference - ) and obviously I don't want a repeat of that.

I've worked really hard in therapy for the last year which my T recognises, (she's great at giving me that bit of validation at exactly the right time), and that's what makes this all the more upsetting. We've been working on the childhood abuse and more recently the anorexia, but the whole truth is that my abuser is well and truly still in the picture. I've always managed myself well but the abuse is getting progressively worse and I can't hide it anymore. He doesn't care about visible marks anymore and has snatched me off the street a block from my house.

I need to tell my T, but I'm terrified she'll report it because she has to report if someone's hurting me. I'm not strong enough for police and court dates but I can't keep this secret anymore. More to the point, I don't know if I can survive this much longer. I'm not good at writing things down, but I also don't know if I'm comfortable testing the waters around this with my T or how I'd even go about it.

I need help.
Thank you for reading & thank you in advance if you leave thoughts for me x