Good Morning
I am sure your therapist shops or uses businesses that other patients own or work for. You are being hired to do a job as a professional not as a patient. Try to keep you hats seperated.
When your working as a carpenter, that is your role. When your in her office your role is the patient. Just don't discuss your business agreement with her when your in your therapy session.
Keep it simple and don't over think the situation.
Take care
Kitt