A 17 year old boy was initially referred by his mother to be seen by you as a counselor in private practice for

A 17 year old boy was initially referred by his mother to be seen by you as a counselor in private practice for

anger management. After three months of counseling the boy turns 18. The mother is noticing strange behavior from her son and demands to see her childs clinical records. you refuse to release the records, informing her that the client is no longer a minor.

What is the ethical issue described in the scenario? Why is this an ethical issue?