I am in full agreement with Georgie. For the people that believe you should tell your wife, can anyone explain why we should tell our wives?
What makes this knowledge so imperative?
There are certain things that you wouldn't tell your wife because no good could come out of it, but potentially could hurt things. For instance, having a sexual dream about another woman. I guess that is the only comparrison I can think of.
But it's not a problem that you need her help with. It's not something that endagers her in anyway or puts her at risk.
If she confronts you about it and you lie, I suppose that is another issue itself. However, I would still choose to deny it. But if you lie and get caught, you have given her great reason not to trust you.
Regardless, there is no good that can come from telling her. But there is a lot of potential for it to bite you in the ass.