I would think that what is discussed between KC and the minister is privileged because esentially a minister is considered a counselor.
Unless she confesses (please Lord let that happen) then I don't think he will be required to tell anything of their conversations. However, if he relays messages to the A family then his 'privilege' is null and void.
CA did make a comment recently that they receive their information (pass messages) through JB rather than going to see KC or receiving phone calls from KC.
Bolded by me
Does that revoke the attorney/client privilege?