According to the elders book, there really are NO expectations of confidentiality. The "hints" are no less breaking confidentiality than a priest coming out of confession, telling a law officer that he just spoke to joe blow and the the officer should go look in the padlocked area of the basement and talk to joe blow about it.
There is no clergy privilege in the WT org and that big in their book is evidence enough. It doesn't stay in JC room. It gets to all congregation elders and then The Branch Office. They try to justify that but once you start telling wife he's an adulterer, leaving out the details doesn't really get you off the hook it breaking confidentiality.
The poster who wasn't warned about husband probably wasn't because it happened when Jehovah didn't think homosexual cheating counted as actual adulterous relationship. It was in their view, nothing to do with the marriage.