Discuss confidentiality in your initial session with the supervisee. As per code below (2.03- Protecting confidential information)

 

Behavior analysts take appropriate steps to protect the confidentiality of clients, stakeholders, supervisees, trainees, and research participants; prevent the accidental or inadvertent sharing of confidential information; and comply with applicable confidentiality requirements (e.g., laws, regulations, organization policies). The scope of confidentiality includes service delivery (e.g., live, teleservices, recorded sessions); documentation and data; and verbal, written, or electronic communication.