I have both a pee kink and a genuine issue with wetting the bed. The latter started only a couple years ago, but has become an almost nightly occurrence, usually multiple accidents in a night. I slept at a female friend's place recently. We shared her bed. I warned her ahead of time about my bed wetting and put an absorbent disposable pad under me and wore pullups. Sure enough, I had about 3 accidents over the course of the night. She was intrigued not just to see a person in their 40s wet the bed on accident -- and so many times no less -- but also with how unembarrassed I was. Similarly, how casually I changed my pullups right in front of her. I don't know how much it turned me on compared to how much it just felt nice to have someone be so honest that it wasn't gross and weird but interesting and -- by her own admission -- "cool" to watch. I asked if I could stay over more often and she said "Please! Yes! That would be awesome!" Has anyone else had this experience?
If it is a kink for you and your friend maybe you could progress towards sleeping on a latex sheet without wearing the pullups so that when you have an accident you both enjoy getting wet. I have a pee fetish too and this is a lot of fun.