Concerns about talking to someone else.
I am always concerned about talking to a third party about a subject that pertains to you and your wife. Crossdressing is an intimate subject and to share intimate details about your relationship with your SO can lead to a breakdown in the closeness you hope to have with her. Perhaps using the third party(like this forum) asking if you should tell your SO might be okay but if she already knows, I think that her feelings about your crossdressing should be kept private. How would you feel, if she shared your or her feelings about crossdressing to a third party. If a third party is brought into the equation, aren't you putting that person's opinion above the opinion that means the most to you?
I have found that people only ask the opinions of other people who they think will agree with their side and never share the opinions that are different from the ones that reinforce your side.
The only opinions and emotions that you should listen to are the one's coming from the person who means the most to you; that's why they are called the SIGNIFICANT OTHER.
*Please don't use my reply in any meaningfull discussion with your wife!