Sharing draft educational material with clients

Hello. I’m a dietitian and I’m setting up my own online counselling business. I’m thinking of offering one-hour sessions with individual clients. During a session, I can communicate with a client or I can work on tasks by myself, such as by creating educational handouts. I want to be the copyright owner of handouts that I create. In my electronic medical record app, I can upload a handout to privately share it with a client.

If I don’t finish creating a handout during one session, a client may want me to share the draft document with them. If my in-text citations and reference list are incomplete, do you think that it would be okay for me to share the draft with them and to call myself the copyright owner of the draft? If yes, do you think that I should include a disclaimer in the draft since the draft would contain information from other authors? What do you think that I should write in the disclaimer? In addition, do you think that I should ask the client to not share the draft with anyone?

I could finish creating the handout in future session(s) with the client.

Thank you!