Not to alarm you, but sometimes if too much attention and counseling or therapy is involved, this can basically become an identification for a child. Now they become what has happened and are now victims or survivors.
Most professionals really mean well, but it's all about money in the upstairs offices.
Let time pass, let nature attempt to heal. Let her know that sometimes bad people will do bad things and that it is not her fault. Tell her that she is smart, kind and wonderful, and to just be her wonderful self. That you are proud of how great she is doing.
With my niece, I told her that we should celebrate how strong she is by going to the dairy queen...hahahaha
Children heal, but sometimes, well meaning folks can strip a child of her identity and they become what happened and not just themselves...
Its an obvious that she doesnt have contact with the abuser, it sounds like a lot has been done I would suggest now it is time to back off, too much talk will make her more anxious. So let time do some healing, less talk now ,time to let it go ,then she will feel better about what happened .let the counsellor do her job.It is great that she has you supporting her as an older sister .Good luck