Doesn't really matter why she needs/wants the x-rays. She is entitled to them - they are hers. She paid for them, and it is her body. She is entitled to them by law.
To the op, you can file a complaint against the doctor. Normally the doctor does not take the xrays, usually it is the lab or hospital. You can request from the lab/hospital for a copy of all records/tests performed on you. If you find that either the doctor or hospital lied to you, you can file a complaint with the state medical board. If you feel it is more serious that that and may warrant a malpractice lawsuit, you should retain a lawyer.