Teresa, in a nutshell, I only 'found' Becky about 16 years into our marriage. Prior to that was a very occasional CD (sexual turn on yadda yadda) so nothing was ever said prior. Then Becky emerged and I realised I was more than a CD that went for around 3 years and I came close to telling her, but did not due to various reasons (not relevant to my story) things going on in our lives.
Then I lost Becky for almost 4 years when ALL CD/TG feelings left me. About 3 years into that phase it kind of came up in conversation so I told her that I used to have urges to dress and that those urges had gone for 3 years (total truth), she did not ask if I had dressed, only the usual are you gay questions etc. I think she concluded it was some kind of panties fetish and it was left as that. When Becky came back I decided that I would not tell her as per all the reasons I have stated in my OP and posts thereafter. So as far as she knows 8 or so years ago for a while I had urges to dress. So she does know a little bit, but its most definitely a DADT situation because if she was concerned about it she would have asked me again if I got those feelings. Hope that clarifies.
Jane if you read your OP the tone is quite negative and judgemental that is why people are picking up on what you said, your later post does clarify your meaning but if you reread the OP I think you will understand.