Sitting this evening with my wife and her besty who both know I dress and I was asked by the friend if she could see some pics of me, dressed en femme obviously,, somewhat pleased with her interest and my wife's willingness to share I quickly selected a few tasteful pics on my iPad to show her, she was quite complementery about them so I was momentarily happy, then she stated that she had told her husband about my dressing a good while back, he's a very good friend of mine, I was a little taken aback.
To be fair the two of them are very open minded and he's never let on to me or said anything, I doubt he ever will unless I broach the subject, ironically I was in his car one day at the supermarket a long while ago before I'd even told my wife when a very badly presented crossdresser exited the vehicle in front of us, we were pretty dumb struck and nothing was really said, anyway, he's not a gossip and I trust his discretion completely, I'm not that surprised she told him tbh they are very close and tell each other everything.
So, if you ever tell your secret, be prepared for it to reach at least one other individual.