As he passes the bathroom door, a twinge in his bladder tells him he needs to pee. Instinctively he steps into the bathroom before remembering he is still wearing his diaper. He turns towards the mirror and lifts the bottom of his gown to watch it slowly change color as he feels the warmth spread across his crotch and towards his buttocks.
The weight has caused the bottom of it to sag. He decides to leave it on for a short time rather than change straight away. After waiting a minute to be sure it has fully absorbed, he takes a step back out of the bathroom. It takes a little getting used to walking with the additional bulk between his legs, but the wetness feels nice. As he walks he reaches his hand down and enjoys pushing it into himself a little.