okay but small bladder subs who never get to pee their diaper enough for it to leak, asking their dom to let them wet til it happens.
dom is in charge of feeding them as many drinks as possible, maybe stuff like tea, coffee, or soda, which they know will go right through them. sub is leaning back against their dom's chest, sipping on a straw while their dom gropes them all over, when their first pee occurs. it's subtle... the front of their padding just goes a shade yellower, but dom notices and comments on it, making their sweet sub all flustered.
they keep going... sub is trying to hold it as long as possible and getting super desperate, but keeps losing control only to let out like, a cup of pee at most? they're starting to feel damp, but they've had like three accidents already! and their bladder is getting weak... they just dribbled a tiny amount again, and probably couldn't hold it if they tried.
much to their surprise, they get a second wind. somehow they're able to hold until their bladder is aching and sloshing... they feel like a balloon about to pop! dom is delighted... this is so cute! they caress and hold sub's lower belly, until finally, there's a loud hiss, and sub adorably pees in their already wet diaper!
the stream is super heavy this time, and sub finally feels pee start to collect in the crotch of the diaper as the padding fails to absorb it all. they keep peeing, feeling it well up, until finally it starts seeping out of the leg holes!
when they finish, sub and dom are both sitting in a puddle, and when they go to get up, sub's diaper is so saggy and heavy with still warm liquid. dom just takes the diaper off, letting it hit the floor with a wet splat. of course, now sub's bladder is super weak... they might even start to go whilst exposed, if the urge strikes again before dom can diaper them up.
Ooooooh, a nice idea! A sub with a bladder that just isn't big enough to hold it properly, they never fill their diaper all the way up! They really want to feel it squish and leak around them, so they have to ask their dom to fill them up and not change them for a while! Until they finally get what they want, and it feels so good... But now their poor bladder is all weak and can't hold anything for a while, oops...