Cohen is a real problem for Sean Hannity

Why?

Because historically Cohen records all his calls.

So, when Sean Hannity denied that he had attorney client privilege with Cohen he unknowingly
harmed both of them.

Because without attorney client privilege all those recordings become government property automatically.

Some of the things that could happen to Sean Hannity:

1. losing his show on Fox because of not revealing his "Friendship with Cohen" to his viewers.
2. losing all of this sponsors because of demonstrating he is not an unbiased and neutral observer
of Trump or Cohen. He is shown to be completely biased now.
3. All his calls to or from Cohen could easily become public knowledge.
4. And whatever was said could be very very damaging to Cohen, Hannity and Trump legally or morally or you name it?

Note: By the way recording your calls with someone else will get you thrown in jail in California where I live (unless you have the permission of all parties concerned).