Hmm.. It kind-of happened, but probably not exactly how you described it and how you’re envisioning it. I did wet my bed a couple of times the past couple of years, because I dreamt I was wearing a diaper and it was okay to pee. But it was never like a full bladder.. all the times it was just a little amount, where I would wake up to realize my undies and pyjamas and a small part of my bed sheets became wet but never my mattrass.. So I’m glad it never happened because cleaning that must be a pain in the butt.
There were also a couple of times I dreamt I was wearing a diaper and I woke up feeling really aroused… but that’s kinda indecent of me, so it’s best I don’t talk about it unless people want to.. So if you wanna, you can respond to this saying your opinion whether or not you think it’s indecent or okay °^°