Personally I was a little sneaky with telling my spouce. she was very new to sexuality, having grown up in a very strict house, and I didn't think it would go over well. I had a job which required me to be outside for a good chunk of the day in the city, and I have a bit of an over-active bladder. There were several times where I peed a little in my pants before I could find a bathroom. Being a DL I had the perfect solution...but I didn't want the then Girlfriend to find out. Im a very disorganized person however, and I knew eventually I would slip up, and have some explaning to do (I had not worn diapers since we moved in together a year earlier, and therefor didnt have any in the house.)
I decided that I would tell her, but down play the excitement about it, and play up my embarasment in having to resort to diapers, which I assured her was the only solution I could think of. To my surprise she was totally cool with it, and thought it was a good idea, I asked her to marry me right there and then.
at first I was very shy about wearing diapers infront of her and would only do it beofre going to work...I would refer to them as my "special undies", and ask if they made my ass look big...eventually I became more and more comfortable with it, and started talking to her about some of the challenges...one of which was diapering my self. To my surprise again she offered to do it for me.
Then something strange happened, after a few weeks of diapering me everyday before work she went into a complete reversal, and asked me to be more descrete about my diaper wearing. I obliged and went back into the closet, so to speak. To this day I don't know what happened, maybe I went too fast.
I have started to push the enveloppe again, as it has been a year since she asked me to be more descrete...staying in a wet diaper for a few hours when I get home, crawling into bed after work wearing nothing but a onsie and a diaper, and taking a nap. and she seems to be getting more comfortable with it.
A few weeks ago I had a flu, and told her I was gonna take a day off and stay in bed to get better, and she recomended I wear a diaper so I would not have to get up so much...she didnt diaper me, but she is starting to be more comfortable with it again...which is nice.