We're talking about a conversation between a minister and a prostitute. So was the Prostitute setting the minister up by making racey phone calls? Did he pass himself off as seeking advice? We have some great technology. Just taping this guys sermons and inserting additional conversation might be possible....in fact....more than possible.
I'll wait a bit before I believe "an obvious blackmailer". The prostitute has absolutely nothing to lose. It's a win, win.
That's my point. It's easier once it's digitized on a computer. Once it's on a computer, it can be edited or altered in such a way, to suit a particular agenda.