can't stop thinking about littles piddling their swim diapers outside of the water... maybe they understand it won't hold their pee, maybe they don't, but either way, their accident isn't hidden at all.
little is sitting on their towel at the poolside. they know they're about to go, and they can't stop it. so they bunch their towel up around their crotch, under the guise of fidgeting, just as they let loose their lil waterworks... letting the towel soak up their wee when it starts pouring out of the leg holes. if their CG asks why the towel is getting unusually drenched... that's only pool water! never mind that it's all warm, and the "water" seemingly came from nowhere, and it doesn't smell like chlorine... it smells like somebody tinkled.
little is sitting on a sandy beach. they were in the water for a while, then sat on the sand, so they've got a bunch of it stuck all over their body. the sun has dried them all the way out since then though. so when they pee... their light colored swim trunks show the wet spots around the edges of the swim diaper super duper visibly, and the trickles of pee that are dribbling across their thighs leave bare tracks where it washes the sand away. maybe they didn't even know the diaper wouldn't hold their pee pee, so they're sitting there, feeling overly warm around their whole diaper area, and awkward because they're making a soggy spot on the sand that clearly came from them. their CG notices almost immediately and thinks their lil potty accident is so cute!
little is at a water park. it's right at the end, and CG wants to leave, but baby wants to go on the big water slide that they've been scared to try the whole time they've been here. baby can feel that they gotta go, as they wait in the long, slow line... but they know their swim diaper won't hold a pee, so they try to just hold it. just hold it til after the slide! but once they're at the top, and the attendant tells them to sit at the opening and wait their turn... they realize how high up they are, and how scary it is! and without any warning, they fear pee, like a little scaredy cat! their abdomen drops, and piss loudly sprays the inside of the swim diaper, catching the attention of the attendant, who sees the faint yellow tint to the "water" around where the little is seated. baby looks up at them, going helplessly, but the attendant winks and holds their finger to their lips in a little "shh" gesture... they're not gonna tattle on the little one for peeing at the top of the slide. then they prompt them to slide down, and baby pees themselves all the way to the bottom, hoping no one else in the pool will notice! (no one does).
alternatively, baby makes it down the slide but gets hurried into the car before they can even tell CG they gotta go potty! they try to make it all the way back home, but... CG hears that telltale hissing when they're only about halfway there. little one sniffles as they genuinely lose control of their ability to hold it, and simply wet all over the seat.
CG takes little to a boardwalk after baby's been playing by the beach for a while. they stop at a snack stand, get something to eat/drink, and sit down at a wooden picnic table. baby hadn't noticed their bladder all afternoon, but suddenly it hits them when they're already leaking: they need to go! they squirm, trying to stop leaking long enough to tell their CG they need a potty, but the leaks keep coming. but it's not an accident! they just can't seem to quite stop gushing spurts and dribbles, at a near constant rate! their swim diaper is actually tight enough around the leg holes that the pee stays inside and just sort of fills it up for a little bit... just warm urine pooling and collecting around little one's crotch and ass. but then the diaper finally can't hold any more. baby had been dripping wet with sea water the whole time, but with a loud splatter... something else is now dripping from the picnic table bench, and onto the boards of the walkway below. baby stares at their lap, blushing, and having an accident. CG just goes over to pet their hair while they hide their face against CG, and finish up.
Oopsie, poor little darlings! Some littles just don't realise that swim diapers work differently from regular diapers, that they can't actually tinkle into them... While others DO realise, but still manage to get themselves into silly situations where they wet anyway! You can't exactly trust them to stay dry, they're only little~