She needs to hire a criminal defense attorney to defend her. I'm not sure that you don't need to talk to an attorney as well based on this facts. I assume you are still a minor, and I assume she is over 18 and is being charged in adult court. Proceed with caution on this. If I understand the post, your parents levied the charges against her. You are in between your parents and this woman in this conflict. Think your actions through.
I am trying to give you a general answer to your question. We do not have an attorney-client relationship by this response on the avvo website. I have not been retained to represent you. I am licensed to practice law in Kentucky and in federal court in this state and the Southern District of Indiana. You need to seek legal advice from an attorney licensed to practice in your area..
You cannot defend her; only an attorney can. She will be appointed one if she is indigent; if not, she will have to provide her own attorney.
Your role would be as a victim/witness. The extent of that role will be determined by the defense counsel and prosecution.
The foregoing is for general information purposes and does not establish an attorney-client relationship.