Slomo said:
I would have never lied to my wife, and actively withholding or hiding an integral part of who I am is no different than lying in my book. I made sure to tell her when we were dating and it started to look more serious. For me that was just the third date, but to hold it even past marriage just tells me you're not serious with her and subconsciously don't want to sta together or you'd let her in to your complete life.
AW is my age, and our generation didn't have the advantage of the internet and the exchange of ideas and support. I didn't tell my wife when we got married. I honestly thought I could forever abandon the desire to wear diapers, and for awhile, I did. I had no desire to wear diapers when we had our own children in diapers, but several years later, it came back with a vengeance.
There are two options here. One is to continue to live without indulging, or only indulging while the wife is gone, and the other is to tell and explain. My wife eventually found a diaper order through Amazon and I had to come clean. It turned out, she was very accepting, but I had told her a lot about myself before we got married, that I lived an exclusively gay lifestyle in college, that I had tried to commit suicide, that I had a psychiatrist while in college, that I had used a lot of drugs and alcohol, and the list went on. We were both free spirits and she loved my craziness.
AW, you know your wife better than us, and from what you've implied, it doesn't sound like she would be accepting. You might try a very different approach sometime, giving her half information such as you like childish things, and see where that goes, but I wouldn't expect much. Also, give yourself an out if she thinks it's weird.