This doesn’t make sense.
You started with “I think”. Telling me you are uncertain yourself. Bringing up another questionable thing here. You stated that you “were told” that he was cooperating and there for you didn’t have to testify. So did you not go to the hearing at all then? Was there still a hearing? And “who” told you that he was cooperating and therefore you didn’t have to testify?
Then I’ma little confused as to what your aunt is trying to get you to “confess”? Are you saying that your aunt is trying to get you to state that you lied about the sexual abuse and your original statement of it?
Finally why is she trying to do this? What does she have to gain from all this?
Is there a chance that there is a little truth to the idea that you may have been lied to in the past about not having to testifying about the assault so that you didn’t have to attend the hearing and therefore did not go to the hearing?