It is nice that she cared enough to stay with you as long as she could. I think that is important to be honest with her and tell her what is going on and that you did cut again. She can't help you unless you are completely honest. Just explain that you tried your best not to cut but you still need to work on trying the other things and maybe think of new ideas that could help. My therapist threatens to tell my family if I cut myself again (I am 24 btw and only put them as an emergency contact) yea I am pretty sure my therapist isn't very good with the confidentiality but it sounds like yours is truly trying to help. Good luck.