Rhou was up late one night laying in her bed. It was hard for her to sleep, with her thoughts drifting this way and that, and it seemed impossible to find a good position to settle into. Despite being made for nighttime use, her thick plastic diaper crinkled noisily with every move, not that she wasn't used to it already. She felt annoyed at first when, on top of all that, she felt a familiar urge in her tummy telling her she needed to pee. Feeling too lazy to get out of bed at this hour, she simply lay on her back and let it out hard into her diaper. A soft hiss emanated from under the covers as her pad swelled quickly and grew warm, a small puddle soaking her butt as her pee collected under her, the diaper unable to keep up with her demanding stream. She didn't mind if there was a little leak. In fact, she didn't mind if there was a big one, either; she'd gotten used to having a wet bed from time to time. Come to think of it, perhaps a soggy bed would help her finally get some rest.
	Another familiar urge struck the bat as she thought about it more. The tingling of having let it out so forcefully, the heaviness of her soggy underfur, the thought of wetting the bed on purpose-it began to make her mind race.
	"Oh, you naughty bat," she cooed softly, reaching down to observe the damage blindly, her paw tracing over the warm plastic. "Convincing your Daddy that you're still just a little bedwetter so you can pee on purpose~ Oh gosh," she whimpered a little, pressing the warm pad against herself. "Oh gosh, feel that pee. All that pee, all in your little diaper. It's so warm, and so wet! Gosh your fur is totally soaked under that diaper, you naughty girl~" She slipped her fingers tentatively under her waistband, feeling her matted fur between her digits. "Mmf, feel all that, yeah. You could've totally wet your bed! In fact~" she muttered the last bit under her breath, her smile audible in her tone as she arched her back a little. 
She relaxed a bit, then bit her lip playfully as a hiss once more filled the air, this time more deep and guttural. Her urethra stretched, tingling as she peed hard into the diaper. A torrent flooded her soggy diaper like a hot shower, instantly weighing down the leak guards and letting out a waterfall of pee from both leg holes into her unprotected sheets. What remained in her diaper left it completely saturated, so soggy the mushy core sagged and fell apart into a gooey mess behind the thin lining. Already the air smelled deep and musky, the inside of the diaper warm and humid. She gasped as she felt how quickly both layers of elastic had failed, a tingle running up her spine as the puddle in her diaper leaked out the back, soaking her tail and running up her arched back. She cooed, then let out another wave, and then a third, each time her spurts becoming shorter and more frantic as her arousal grew.
By this time buckets of pee were gushing out her diaper, splashing loudly as liquid hit liquid, the waterfalls crashing onto the puddle already struggling to soak into her bed. Having loosened her diaper, her stream now splashed everywhere as it hit the plastic, no longer stopped by the elastic around her thighs. It sprayed all over the blanket over her and ran in little streams off her bed into the carpet as her bed finally gave in. By this time, she knew her mattress had soaked through; surely the underside was now dripping profusely onto the soft floor. Grinning to herself, she decided to make an even bigger mess.
Reaching down with both hands, she tore a hole in her diaper with her thumbs, then pulled, tearing her diaper open until the little hole became a gash, then a valley as she severed the disposable's weak waistband. She continued to tear her diaper in half right down the middle, the gooey yellow contents spilling out onto her bed with a plop as they landed on the pee-soaked sheets. She couldn't hold back any longer, grabbing a handful of the mushy remains of her diaper and smearing them against her pussy. Her eager folds tingled, her clit throbbing for release, but the mess was too soggy, smashing between her fingers and getting into her fur. Playfully frustrated, she grabbed another handful, and then another, until giving up when it was apparent her mess wouldn't come to her. Tossing off the blanket, the bat got up on her knees, causing a squelch and a small puddle under each knee as she moved, a pitter-patter of her bed like a sponge squeezing out more into the already wet carpet. Her diaper clung loosely to her soaked fur, only still in one piece by the still-attached tail belt. Scooping the slimy bits of padding together as best she could, she lowered herself onto it. Once again it gave under her weight, this time conforming to envelop her thighs and butt in gooey warmth. She moaned at the warmth, pressing more to find it only continued to give way.
Whimpering, the now desperate bat crawled over to her nightstand, pee and gooey diaper dripping from her fur, and opened it up to retrieve another diaper. Tearing the last of the first one off of her, she unfolded the new one, then began kneading it to fluff up the padding. She turned and lay the diaper on her bed, kneading it against the sheets, feeling it warm and soften as her bed squelched beneath her. Turning it over, she sat down and taped herself up. Pulling the waistband forward, she began scooping her old diaper's padding into the already musky padding of the new one, feeling the warmth and humidity on her loins again as the plastic mostly contained its contents.
She then straddled her pillow, which had until now only gotten a little damp on its casing, and began to grind against it. With the new diaper helping to keep her mess in place, she panted, humping her pillow hard, feeling it already grow warm under her weight, her bed still eagerly sharing her deluge. As she rubbed against the mushy little crystals tickling her, she released another long spurt of piss into her new diaper, feeling it once again give under her weight and destroy her pillow beneath her. The remains of her first diaper all but liquefied, oversaturated to their max as they were washed out by her stream all over the pillowcase and bedding beneath her. Pulling the pillow against her, she pressed with her full weight, smashing her second diaper against her in a slimy mess as she nearly blacked out, her muscles losing all control.
She might have let out a squeal as the first wave overcame her, but she couldn't tell; all her attempts to stay discreet were long thwarted. Colors danced across her vision as she clamped her eyes shut tight, biting her lip until she felt the thick warmth of her blood run down her chin. She could only twitch her arms, rubbing furiously against herself through her ruined pillow as she fell over onto her soaked sheets, rolling just enough to spread her legs, though the squeezed and spasmed in pleasure. Her breathing ragged, she could only let out a whimpering through her lips, her jaw clamped tight as her body was wracked with an electric surge of stimulation. She had been building to this, making her parts tingle and thirst for more this whole time, and now that single point of pleasure was the only thing she could definitively feel as her muscled relaxed and contracted.
At some point, the feeling began to subside; she couldn't tell how long it had lasted, or when she came to. She never fully did, instead feeling herself, finally exhausted, falling into a deep and restful sleep.