Wife is cheating, am sad but confused?

[HopelessInLove]

I told her that I knew of her talking to the other man and emailing questionable material. I told her to stop those exchanges. Which she claims she did. This was back in June. She said she feels like I am watch her every move.
Last night, I told her that I know that she has started back up with the OM in talking, since August. She admitted to that, but without telling her that I have recordings of her and the way she was talking to OM, I could not get her to admit anything else. So confrontation about what I heard, no. Does having her listen to tapes make sense?