DM to DF massage

"Hey DF! Just a gentle reminder that our massage sessions are a safe and confidential space. Please keep our conversations and sessions private, and let's maintain that trust. Thanks for your discretion and support! Looking forward to our next session!"

Or, if you want to be more concise:

"Hey! Reminder: our massage sessions are confidential. Let's keep the trust"

This message serves as a friendly reminder to your friend (the massage therapist) to maintain confidentiality and discretion, which is essential for building trust and a comfortable environment during massage sessions.