Continuing DBing after the affair

[PeterV2]

My W went to our MC yesterday by herself. I went today. The situation is this: My W apparently thinks I had or have an ongoing internet relationship with someone or something like that and she wants me to confess to it. I have no idea what she's talking about and she won't tell me. our MC said that she is so angry about it she can think of nothing else. And if it's true then the M is over.

Problem is I've asked her what she's accusing me of and she won't tell me because she wants me to be honest and admit to it. I have no choice but to ask her to tell me what I'm being accused of so I can at least understand where she's coming from.
I truly have no idea what she's talking about and it's consuming her.

I've asked her before and she refused to say - only saying "you know and I want to hear it from you". Bit of a standoff if you ask me. And although I see it as extremely unreasonable, she sees it as very reasonable and important that I "get real" and fess up. I just wish I knew what she was talking about.