Well, good for you that you made sure she knew before she married you. I made sure my wife knew everything, and that I'd never give it up, before I asked her to marry me. She accepted it up front, and so far (about 30 years) she has known that my diapers are part of who I am, and she participates when possible.
But I can also relate to telling your significant other, having them accept it, then having them change their mind after a while. Back in the 1970s I had a girlfriend who initially accepted my diapers. She did not want me in her pants! Said she was "saving it for marriage." However, she compensated for not letting me have that by accepting my diapers.
At the time it was "you can't have this but you can do that." But then after two years she finally decided to let me into her pants and it was "well, now that you have this, you no longer need THOSE."
So, yeah, sometimes even when you do everything you can do to let them know up front that you love wearing your diapers, and they accept it--they can still later change their minds.
Fortunately that's not the case with my wife.
Anyway, good luck on this.