Say for example, I am an immigration consultant. I have a married client - Shiela and Arthur. Sheila is sponsoring Arthur. They already paid me $10,000 for spousal sponsorship application. Sheila phones me and told me that she suspects that Arthur is unfaithful. She asked me to tell her if I find out about it. If he is unfaithful then she will not sponsor him anymore and will divorce him. I agreed to tell Shiela if I would know so as not to lose them as client.

Is it unprofessional that I agreed that I will tell her if I find out that Arthur is unfaithful? If so, what should I have done instead?

Is it against the Code of Professional Ethics that I agreed to her? If so, which code did I violate?