Baby Sister (Patreon)

"Morning, baby," Terri sneered, opening up her younger sister's door without knocking. There was no need, really; babies didn't need privacy.

"Terri!" Haylee howled, glaring back at her, tugging her skirt up frantically, though not before she saw Terri's phone flash. The picture would be blurry, probably, but that was small comfort when she knew Terri had dozens of them, if not more, and that, even if it wasn't easily visible in this one, all anyone would have to do was compare it to one of the others to see that she was, indeed, wearing a Goodnite. "Come on!"

"Aww," Terri chuckled, watching the younger girl stomp her foot, the knowledge of what she had on under her skirt just making the action seem more fitting. "Don't worry, squirt, you'll thank me when you're older... These will look so great in your baby book! And if you don't want me to do this... All you have to do is hold it, and stop peeing your pants like a baby. It's as simple as that..."

Haylee's nostrils flared, arms crossing. She had, of course, complained to her parents about this, but there was only so much they could do... Or would do. They acted sympathetic towards her plight, and the incontinence issues she'd started having recently, and yet, after the doctor had been unable to find a medical cause, or a cure, she got the feeling they were beginning to get much the same attitude as her mean older sister: that Haylee was doing it for the attention.

And Terri was more than happy to give her that attention. "This is a good one," she claimed. "A nice action shot... Very artistic. I can't wait to post this and see how many likes it gets."

"Terri!" Haylee repeated, unable to help herself. She'd heard once that the best way to deal with a bully was to ignore them, act like they didn't bother you... If she trusted Terri not to follow through, she might have tried, but she was terrified about what would happen to her already shaky social life if even one of the pictures on her sister's phone got out onto the Internet.

"Well..." Terri waffled. "I guess I could be persuaded not to... If I got an even better shot. Come on, Haylee, what do you have for me?"

It was a vicious cycle; if Terri got one picture of her in her padding, in order to keep that one hidden, Haylee had to give her another. A lot of this could have been solved by a lock on her door, but her parents seemed to think she was still five years old - and her problem didn't help - and it would be too dangerous in case there was a fire or something. 

"Fine," Haylee hissed, popping her thumb into her mouth. "There, are you happy?"

"I can't even see your diapers," Terri pointed out. 

"They're not diapers," Haylee grumbled, sliding her skirt up, showing off the butterflies on the rear of her Goodnites, knowing better than to fight. "How's that?"

"Perfect!" Terri snapped the picture. "You should be a model, squirt... Maybe I'll call up Pampers and see if they need anyone!"

Haylee did her best not to show how upset she was until Terri was out of the room, and even then, she kept the curse words and nasty names silent, worried Terri was waiting right outside the door to pop back in. It was no fair... She was smaller, younger, weaker, she had no privacy, no dignity, no power... All of this really did make her feel like the baby Terri loved to call her... If only there was some way to make her sister see what it was like...

_____________________________________________

It started at the worst possible time, right in the middle of class, almost exactly. Terri hadn't really been paying attention to her droning professor; her eyes had been fixed on the clock over his head, waiting for the hand to move just a little further, to tell her that she was at least halfway done.

And then... It happened. To say it was out of nowhere would be a lie, though not by much. She'd felt the pressure in her bladder, thought nothing of it, positive she'd have no trouble making it through this class - but, if it got any more boring, she might excuse herself to take care of it anyway - was barely thinking about it, it was so faint.

Until it wasn't. Even that wasn't totally accurate, however... It wasn't that it got worse; if anything, it got better. It wasn't until she heard a drip onto the tile floor beneath her that she realized why the fullness, such as it had been, had vanished altogether. Her cheeks burned as she glanced down at her lap, stomach churning at the sight of the wet spot on the crotch of her jeans, the puddle in the seat below her...

She'd wet herself. Just like her dumb baby sister claimed, she hadn't even had the chance to run for the bathroom... Terri had been so certain Haylee was exaggerating, that, if she wanted, she could have made it to the toilet anytime... Terri could have gone, sure, but there hadn't seemed to be any point. And now...

She nibbled her bottom lip, squirming, wondering if she should excuse herself, or wait until class was over, praying nobody saw the liquid pooling under her chair, heard the dripping. There would be a walk of shame either way... It was just a choice of doing it now, while the classroom was full, but the hallways probably mostly empty, or after class, when perhaps it would be only her and the professor... Until she left the room.

"Would you like a paper towel?" Terri looked up, cheeks red. "It looks like you spilled your drink," the professor said. "It happens, you can get the paper towels from my desk here."

"Y-Yeah," Terri nodded, a sensation of relief washing over her. "Yeah, I spilled my drink, that's it!" It was a good explanation, one she was positive she would have come up with on her own, given time... It was better to have someone else say it first, though, so it didn't sound so much like an excuse. She got up, shuffling down to the front of the class, glad everyone had heard him say what had happened...

But her confidence was quickly shaken as she heard the whispering start, even before she got to his desk. And then, to her horror, on the way back, she heard a click, saw one of the boys giggling at his phone screen. "You erase that right now!" she demanded, only for him to act innocent, as if he didn't know what she was talking about.

What was going on?! She wasn't a baby, like her sister! Why had she peed her pants like one?! And, unlike Haylee, she didn't keep a spare outfit with her, in case of leaks, so, after wiping up as best she could, she rushed out of class, and to her car, driving from her community college campus back home to change, staying home for the rest of the day.

She must be sick... That was it. She didn't feel sick, but that was the only explanation, especially when it happened again, while lying on her bed, and then, worst yet, in the middle of dinner, when she was very intentionally trying to pay attention to her bladder, to make sure it didn't betray her. Stupid Haylee, in her Goodnites, had the audacity to laugh at her, to ask if she needed to borrow one!

"No!" Terri spat back, furious. "Unlike you, I'm not doing it on purpose!"

But that wasn't what the doctor said. "Sorry," she shrugged. "Just like your sister, I can't find any physical reasons for it. You could do what she did, and try..."

"Don't you dare," Terri warned her. "I am not wearing Goodnites!"

And that was true... Unlike her sister, she was too big for them. So, instead, she had to resort to more drastic measures.

"These are awful!" Terri complained, pulling her pajama pants up over the diaper, groaning as they almost instantly slid back down, exposing the plastic yet again. "Mom, come on, I can't wear these!"

"You're going to ruin your mattress if you don't do something," her mother told her with a frustrated sigh.

"Mom, you know I'm not doing this on purpose, right?" Terri asked. "I-I'm not like Haylee..."

"If you say so, dear," her mom replied, neither looking, nor sounding, convinced. It was quite the coincidence, Terri had to admit, her problem starting up so relatively soon after Haylee's, after seeing how much attention she got for it, after she'd shown so much interest in it, even if it had been to mock her sister.

"I'm not!" Terri pouted, stomping her foot, blushing as she recognized that as something straight out of Haylee's playbook. It really did feel like about the only thing she could do, though... And that made it feel all the more silly, and childish. 

"I just didn't expect to have both my daughters back in diapers again," her mother said. "Especially not while one is in college, and the other about to start."

Except... She didn't. As Haylee had loved to point out, her Goodnites weren't diapers. Terri had always disagreed, until she got her diapers, and saw how very different they actually were, so much thicker, and louder, and more babyish... The Goodnites practically looked like real, big girl panties next to them. And worse still, Haylee didn't even wear those for much longer.

She didn't get out of them right away, of course, nobody trusting her immediately when she claimed she thought she was over her potty problems. After a week with no accidents, however, only Terri objected to letting her move back to her regular underwear, and that just made her look like a jealous little girl, stuck in her diapers while her sister got promoted back to where she'd been, mere days before.

"It's not fair!" she fumed. "She should be the one in these stupid things, not me!"

"Then why are you the one who's wet?" her mother asked, no immediate answer springing to mind. "Honestly, Terri... You're acting more immature than she ever did about this."

"That's because she didn't have to wear these!" Terri pawed at her bulky diapers. "You know, there are smaller adult diapers! You didn't have to get me these!"

"You could've bought your own," her mother replied. "You are an adult, supposedly." And, when Terri ran out of her current package of diapers, and, frustratingly, needed more, her parents did get her another kind... But they were even worse. Just as thick, but this time printed all over with happy, frolicking animals, looking like something a real toddler would wear, instead of the more understated white and purple design she'd had before.

"I am not wearing these!" Terri insisted. "Haylee can have them! She's the baby!"

But that was the wrong reaction... "Young lady," her mother gritted her teeth, "you're the only one who's been acting like a baby lately... So much so that I can't help but wonder if you're doing it on purpose. Either way, if that's how you're going to act, that's how we're going to treat you." 

Terri was, obviously, not happy as she heard about her new life, filled with early bedtimes, her younger sister as a babysitter, and no potty privileges, though a spanking from her father when he got home and a taste of her new bedtime was enough to get make it sink in how serious this was. 

When she heard her door open, while she laid there, staring out her window at the still-setting sun, she hoped it would be her parents, telling her they were sorry, that they'd over-reacted. Instead, it was Haylee, making Terri blush, pull her covers up higher, ensuring her diapers weren't showing as her sister strutted in, her tight leggings making it clear there was no padding underneath.

"I didn't get a chance to say night-night," she said, stepping into the room, kissing Terri on the forehead. "Sweet dreams, baby sister... Uh-oh!" She gave the obvious bulge under the blankets a pat, feeling the squish, making Terri squirm in humiliation. "Oh, poor thing," she mocked. "All you have to do is hold it... Isn't that what you used to tell me? It's as simple as that..."

"It's harder for me," Terri whined. "I have an actual problem!"

"Sweetie," Haylee leaned in closer, "you have exactly what I had. I found a little spell to let us switch potty training... And, as crazy as it sounds, it works. It was just as hard for me as it is for you..."

That couldn't be true... But, staring up into her younger sister's eyes, remembering how things had changed, and the timing of it all, it was too big of a coincidence. "Th-Then I'm sorry!" she sniffed. "I-I should have been nicer..."

"You should have," Haylee agreed. "But it's too late now. I'm the big sister now... And you taught me everything I know about how they're supposed to treat their baby siblings." She gave the diaper another pat, a bit harder this time. "I can't wait to start a baby book for you..."