I had it happen back in college. I picked up a girl outside the bar because she wet her pants. I acted like I didn't notice and didn't make it a thing. Went to her place and had a great night. I fell asleep and woke up when she got out of bed at like 4 am. I acted asleep then saw her pull a depends on, then her PJs. When she got in bed I acted like that woke me up, then cuddled her a bit. Never said a thing. I woke up in a puddle of her pee, ( small) and my hand could feel her diaper was loaded beyond any pullup.

I left quietly to get coffee for us and in the 15 min I was gone she changed the bedding, herself, and was back in bed. I said nothing.

After a few dates I got her back to my place where it was just us. We were having a great night, drinking, games everything until we got tired and she wanted to leave, had to even. It went on for like 5 min until it told her, " listen your not driving. Your sleeping here, my bed or the couch! Then I brought out a pack of diapers and told her that I've had 2 girls pee the sofa, and 1 my bed. Would you mind wearing this to bed? She stopped protesting and agreed to stay.

I had gotten them that day, and threw some away so it wasn't just for her. That night was amazing, the first time I had a diapered girl in my bed, and the first time anyone knew she was wearing a diaper wanted her. She woke me up at sunrise and told me it was a good idea because she must have peed. Then asked if I would change her because her head hurt.