One for you, and one for me
"OK, now lift up for me."
Pipp blushed. "I know how this goes, Zipp. You don't have to order me around!" she hissed, clearly embarrassed.
"Aww, come on, sis. Don't make this any harder than it has to be," said Zipp with a frown.
"I can put it on by myself!"
"Mom said I have to help you. If you do it on your own, you'll leak again."
"I don't leak!"
Zipp stuck her tongue out. "Oh yeah you do, Pippleak."
"Hey!"
"Sorry, sorry. It's been a long day. Cables caught me the wrong way on the way down to the throne room. Now scootch up already!"
Pipp gave her sister a defiant glare, but raised her rump up and allowed Zipp to slip the fluffy white diaper underneath. She thumped her pink butt down on the padding. "There. Happy?"
"Good little filly!" cooed Zipp, which earned her a hoof swipe. Zipp dodged just in time. "Yikes, OK, I get it. Moving onwards."
Next, Zipp grabbed a bottle of foal powder from the bedside and applied it liberally to her sister's hindquarters. The foalish scent filled her nostrils and gave her a strange thrill. It was just like when they were little fillies, when their mother used to change them together, and she felt a wave of nostalgia for those more innocent times.
Her reverie, however, was interrupted when Pipp, still quite put out, growled, "Move quicker, Zipp."
Zipp snapped out of it and grinned cheekily at her kid sister. "Alright, filly, let's wrap you up!" She pulled the front of Pipp's diaper up and over her belly. She held it in place with one hoof, and was just starting to nose around for the tail hole when she heard a squeak that made her pause.
"What was that, sis?" asked Zipp.
"N-nothing. You tickled me, that's all. Just get on with it."
"No, no, wait. This is too good. Are you still ticklish like when we were foals?" Zipp gave an experimental press on Pipp's tummy, and was rewarded with an even squeakier squeak. It was adorable. "Oh my gosh, this is so awesome!"
Pipp glared at her big sister. "Don't you dare, Zephyrina Stormhaven! Just tape this stupid thing up so I can go to bed!"
Naturally, Zipp ignored Pipp's pleas. Instead, she raised a hoof and rested it on Pipp's belly. "You mean. Don't do... this?!" she exclaimed, and began to tickle her sister mercilessly. Pipp burst out in high pitched laughter as she began to giggle uncontrollably.
"S-s-sto-op! Zi-iip!"
Zipp just chuckled. "Oh, man, you really are a silly filly. What about if I did... this!?" And with that, she blew a big wet raspberry on Pipp's tummy. Her sister's hooves began to flail about as her laughter doubled in volume.
Another quick blow pushed the tiny pink pegasus over the edge, and she pleaded, "Stop! Stoooop! Ziiii~p stooop!" Pipp pushed her sister's head away, breathing heavily. Zipp finally relented and withdrew with a smirk.
When Pipp eventually calmed down, Zipp looked down at her sibling. "Still just as ticklish as ever, huh, sis?"
Out of breath, Pipp responded, "Still a big meany, eh, Zipp?"
"Alright, alright. Time to finish up, kid," replied Zipp.
"I'm not a kid!" pouted Pipp.
"You'll always be a kid to me, little sis." Zipp paused at the last waist-tape. "Besides, who's getting the diaper change, anyways?"
"Zipp!" Pipp blushed an even deeper shade of crimson as her big sister secured the final tape.
"Aaaand, done! How's that for an expert diaper job?"
"Ugh. I'm sure it's fine, Zipp. Now go to bed. I have a concert tomorrow, and you know how Mom hates seeing bags under my eyes."
"Yeah, yeah, sure thing, Pippsqueak," replied Zipp as she headed towards the door.
"Oh, and Zipp?"
"Yeah, sis?"
"You tell anypony about this, and I will murder you live on WingTube."
"Ten-four, kiddo. Get some sleep, eh?"
Pipp huffed, buried herself under her covers, and closed her eyes.
Zipp clicked off the light, but before she left Pipp's room, her eyes rested on the pack of CloudguardTM diapers by the door. A quick glance assured her that Pipp was busy thoroughly ignoring her. Carefully, trying not to make any sound, Zipp nipped one of the diapers and tucked it under a wing before shutting the door behind her.
Well, this night just got a whole lot more interesting.
~ ~ ~
Zipp concentrated, but she just couldn't do it. She obviously had a bladder like the old pegasus warriors, so she stood up and trotted around her bedroom, just enjoying the feel of the fluffy padding on her rump.
After a while, Zipp stopped in front of her mirror and took a deep breath. It was just a diaper, right? So why was this so difficult? She had to pee so bad! How could her little sister do this in her sleep?!
Carefully, Zipp spread her hind legs, closed her eyes, cleared her mind, and gave a small push. Finally, a little trickle of pee slipped out before her bladder clamped down again. Progress! She took a moment to assess the situation: her diaper felt a bit warm in the back, but the fluff had soaked up her urine so well that she didn't feel any wetness. These things really worked!
Zipp pushed a bit harder. Another trickle made its way into the thick diaper. She closed her eyes, took another deep breath, and began to relax. Finally, a slow stream of warm urine began to soak into her diaper as her bladder voided itself properly. The padding around her rump quickly soaked up her pegasus pee, and a feeling of sweet relief washed over her.
At last, Zipp was done, her bladder blissfully empty. She considered the feel of her diaper, now sagging with the weight of her urine. It felt heavy, soggy in the middle, and sinfully warm. Truth be told, it was a bit of a turn-on. She even felt herself getting wet back there, but in a different way. Reaching a hoof between her hind legs, she felt the wet padding there. When she pressed down, she could feel the diaper *squish* slightly against her backside. It sent shivers up her spine, but in a really good way.
I don't know why Pipp hates this so much, thought Zipp. Diapers are actually freaking hot! She began to rub herself through her diaper as she thought of her little bedwetting sister, fast asleep and secure in her puffy white padding. Pipp's probably pissing herself right now. The speed of her rubbing increased. Fuck, her diaper is going to be soaked just like mine! She was getting close now, her breathing heavy and her pussy winking hard against the wet material of the diaper. We're both just pissy little princesses, aren't we?
With that thought firmly in mind, Zipp began to cum. "Pipp, mmmhhh..." she whispered as she squeezed her hind legs together and rode out her orgasm. Zipp's diaper greedily soaked up her juices as she squirted into the already wet padding on her rear end. Her hips bucked and twitched as pleasure washed over her. Wave after wave of warm lightning travelled through her, making her teats tingle and her pussy spasm over and over.
When it was finally over, Zipp stood on weak knees, blushing and twitching with little after-jolts of pleasure. A glance at the mirror revealed her standing there trembling, red-faced and sweaty, her wet diaper bulging with pee and other fluids. She sat down, exhausted, and felt the squishy diaper mold itself against her rump, pressing against the sensitive, overstimulated folds of her pussy.
Zipp stayed like that for a few moments, basking in the afterglow, before she realized just how tired she was. Finally, she stood up once more on shaky legs. Her head swirled with conflicting thoughts. Was she a naughty pony? How could peeing in a diaper feel so good? And when could she do this again?
Face still warm, Zipp carefully untaped her wet diaper. It fell to the floor with a lewd plop that she found both satisfying and gross. Exhausted, the crown princess of Zephyr Heights climbed up onto her bed, and promptly fell fast asleep.
~ ~ ~
The next morning, Zipp Storm woke up with the rising sun, stretched her limbs, and hopped out of bed. She felt immensely refreshed, like a whole new mare. Last night had been the most fun she'd had since discovering the joy of a hoof between her haunches. Humming a light tune, she slipped out of her room and headed to the Royal Baths for her morning shower. When she reached her destination, however, she found Pipp, who had just finished up with her own bathing.
Pipp nodded to her sister. "Morning, Zipp," she said politely. Just barely politely, but it was better than Zipp got most mornings, so she rolled with it.
"Morning, sis. Sleep well?" said Zipp. Privately, she wondered if her sister had wet herself again last night, but pushed the thought away quickly.
Pipp gave her a smile. "Actually, really well. You, ah... really helped me out yesterday." She blushed as she glanced around to make sure there were no guards within earshot. "I didn't leak, so. Thanks for your, um, assistance. I guess. Even if you were being a pain in the flank."
Zipp gave her sister a cocky grin. "No problem, Pippsqueak!" Her expression softened a bit. "And, um, sorry if I teased you a bit too much. It's just what big sisters do, you know? I'll be nicer next time, though, I promise."
In a rare show of affection, Pipp nuzzled her head under Zipp's chin. "I know, Zipp. And I know you will."
As she trotted out of the royal baths, Pipp looked back at her older sibling with a smirk.
"I know you will, Zipp. Because if you aren't, you'll have to explain to Mom why you smelled like pee this morning."
Author's Note
Another big-sister Zipp diaper fic, this time with a smutty twist. Why am I like this?
