I am not sure. I will say this, I had alluded to having unusual sexual attractions while dating. But I never mentioned the word diaper, and I planned to basically keep the specifics vague. In a similar way, my wife had told me that she had some abuse as a child, but didn't want to give any more detail. I was fine with that.
However, I did eventually tell my wife everything. Maybe not every single thing I had tried with diapers, but certainly enough for her to get the picture. This was very early on, and we've been married over 15 years now. Do I regret telling her? No. But did it all go great and become exactly what I wanted? Also no. I would say my wife is aware of my habits, desires, etc. But she is not interested in participating. Neither is she trying to get me to stop. Basically, if I keep it private, she has no complaints.
But I'm not sure about all that. I suspect she'd rather I stop with the diapers. It is relevant that I do legitimately have mild incontinence as a result of a severe car accident and some related medical conditions. But I can get by with pads in the day, diapers at night. When I'm around my family, that's how I do it. I couldn't get by with zero protection unless I am okay with obvious leaks. So, I am going to use pads no matter what. But I prefer diapers. I also can't use pads at night, they are not effective when I'm laying down, only diapers will do.
I think initially my wife thought maybe she could wean me off of diapers. I kept telling her that it wouldn't work. Once I actually became incontinent, that settled it as far as I was concerned. I think she accepts that too. I very nearly died a few times from the accident and related illnesses, so having mild incontinence is a small price to pay.
I think my wife is very supportive even if she doesn't want to be involved. I don't really want her to be involved unless she wants to be involved. It would kill the mood for me if I knew she was grossed out by seeing me in diapers.
However, I have also told other close friends and family about my love of diapers with mixed results. Some of them get it and are cool. Some of them simply do not get it, and are permanently alienated from me. I wish in hindsight I'd have been more careful with who I talked to and what I said. All of this to say, it can go quite poorly. But it can also go well as you see from some of these stories. I supose for myself it went well enough, but not a dream come true level of good. Trust me, I am very content with what I have. But it isn't everything I want. I'd be happy if my wife was more open to seeing me in diapers and not being grossed out.