I'm looking for a really old story (like 20 years old) about a girl who was a cheerleader. One of the other cheerleaders breaks her leg and gets a lot of attention from her classmates. The main character girl gets jealous and pretends to be pregnant to get attention herself. She fakes being pregnant by bloating with water and soda, gradually making herself bigger as the months go on. At the end the other cheerleader tricks her into drinking a special drink that causes her to gain weight that stays even after her "pregnancy" ends.

“Oh, that Sarah!” thought Katie. “We’re both co-captains, but everyone listens to her and disregards whatever I say. She gets so much more attention than me!”
Katie was co-captain of her high school cheer team. She was about 5’2” with raven colored, shoulder-length hair, which she often wore in a short ponytail. She was quite popular, which made sense, since she was something of an attention hog. She’d do almost anything to get noticed.
Sarah-though Katie would never openly admit it-was her rival. Sarah was blonde with blue eyes-your typical cheerleader, little Mrs. Perfect. Everyone loved Sarah, and she hardly had to do a thing to be the center of attention. She was one of the few girls in school more popular than Katie.
*Tweet* The coach blew her whistle. “Ok everybody, let’s try a pyramid.”
It was at this point that a sinister scheme began to form in Katie’s mind. “Gee, it sure would be a shame if Sarah were to have a little accident,” she thought. The squad got into position, and began forming the pyramid. Katie was 2nd from the top. Sarah, of course, was at the pinnacle. After a few seconds, Katie went into a fake wobbling motion. “Whoa, woah…” she went from side to side, faking an attempt to hold Sarah up. Then, with one final jerk to the side, she let herself fall. The team below her was able to catch her when she fell, but she had dropped Sarah off to the side. There was nobody to catch her. Sarah crashed to the ground with an audible grunt, which was followed quickly by an even more audible crack. Sarah curled over and grabbed her right leg with both hands. “Ow, ow, ow, it hurts!” The team gathered around her franticly, with a stream of questions. “Where does it hurt?” “Are you ok?” “Is it broken?”
The fall had fractured Sarah’s right leg. An ambulance was called, and she was taken to the hospital. Katie had to hide her smirk for the rest of the day. “Success!” she whispered under her breath.
The next day, Katie had assumed the role of full captain. It was perfect-she got to boss people around, everyone had to listen to her, she was the center of attention. Things were going exactly as she planned, and she was in heaven….at first. The following week, Sarah returned. She was on crutches with her leg in a cast. The team was just about to start practice, and Katie was addressing them. “Ok team, today we’re going to-” Suddenly, one of the team members shouted “Look, it’s Sarah!”
Sarah was hobbling on her crutches in the direction of the practice. The whole team ran over to her and helped her get to a bench. Katie continued to lead the practice, but she could tell that everyone’s focus was on Sarah’s return.
After practice, as Katie was leaving, Sarah stopped her. “Hey, you led a good practice. Maybe I should let you take over more often,” Sarah said with a giggle. “Uh…thanks!” was all Katie could muster, feigning a smile. Katie was almost feeling sorry for what she’d done. Immediately, the two were swamped by the rest of the team rushing over to sign Sarah’s cast. Katie’s hatred of her rival instantly rose back to the surface, and she turned to leave the melee, grumbling under her breath. Katie knew what this meant. This meant Sarah’s popularity would increase tenfold now that she was back with crutches and a cast.
She was right. The next day, Katie watched in disgust as everyone waited on Sarah hand and foot. They carried her books for her, they held doors for her, teaches even excused her for being late because of her crutches. Katie’s perfect plan had backfired horribly.
After a few days of this, Katie was going insane. She thought her plan was fool proof. She was sitting at lunch with a group of her friends, as usual, but she couldn’t concentrate. She could only sit there and ponder what to do. “What do I do?!” she thought. “I’ve got to come up with something to counter Sarah’s broken leg; something to even the playing field. But what?” She was beating her head against a wall trying to come up with something to get some of the attention away from Sarah and back to her.
Katie was angrily eating her lunch. When she finished, she would go back to refill it.
“Excuse me. Mrs. , you’ve already had-” Katie cut her off. “I’ve got money in my account, right!? Take it out of that.” Katie went back for a 2nd and 3rd lunch, not realizing how much she was eating…well, either that, or she didn’t care. She was eating out of anger. When she had finished her 3rd tray of lunch, one of her friends felt compelled to pipe up.
“If you eat anymore, Katie, you’re going to end up with a food baby,” she giggled.
It was at this moment that Katie got the answer she’d been looking for. A twinkle appeared in Katie’s eye. “That’s it,” she thought, “I’ll pretend to be pregnant! That should give Sarah a run for her money. I’ll just order one of those fake inflatable things off the net and wear it during school.” She was now getting giddy. “I can already see the look on Sarah’s perfect little face when she notices me getting more attention than her!”
Katie could hardly contain herself. She decided to announce her ‘pregnancy’ to the cheer squad at practice after school. She went through the rest of the school day smiling ear to ear, making sure to flash Sarah an extra sweet smile whenever she passed her in the hall.
After school, the cheer squad was all assembled, complete with Sarah sitting on her usual bench since she broke her leg. Katie got up in front of the group as usual at the start of practice. “Ok everyone,” she said, “I have a special announcement to make before we start practice.” Suddenly, a hush fell over the group. Everyone was anxious to hear what Katie had to say. Even Sarah was alert. All eyes were on her, and she paused for effect. “…I’m pregnant!” Katie exclaimed. Everyone rushed to Katy to congratulate her and gush and shower her with praise. Everyone but Sarah, with her broken leg. It was quite a sight for Katie to see Sarah sitting there on her bench, all by herself, as everyone fawned over someone else for a change. Even better for Katie, that someone was her.
That night, in her pajamas, Katie got on the internet to order the fake inflatable pregnant belly. She typed her desired item into the google shopping bar. A few results came up. She could get the fake belly for only about ten bucks. She clicked on one, and a box popped up: Sorry, out of stock. A bit frustrated, Katie clicked on the next: Out of stock. She repeated this about five times, getting more frantic with each item. “Th-this is impossible! They’re all out of stock!?” She couldn’t even find one on Amazon. Katie’s mind was racing now. “What do I do!? I already told everyone I’m pregnant! If I don’t start getting bigger eventually, everyone will know I’m a liar, and they’ll all hate me. My reputation would be ruined!”
In her frenzy, Katie’s mind wandered back to what her friend had said earlier: “If you eat anymore, Katie, you’re going to end up with a food baby.”
“I couldn’t do that,” Katie thought, “I’d never be able to eat that much…plus everyone would notice me eating all the time.” Katie had almost given up hope, but then, a voice in her head said “What about liquid?” Katie thought about it. Liquid would take up more room than food, because there wouldn’t be any spaces left in her stomach. In addition, it would be much easier to sneak liquid than food. If kept in a bottle, nobody could tell how much she was drinking. Oddly enough, it all started to make sense to Katie. “I can’t believe I’m actually considering this,” she said to herself with a nervous laugh, “But it’s either I go through with this, or my reputation gets wrecked. Why did I tell them I was pregnant before I got the belly!? The soonest those things will be back in stock is six months, and I don’t have that long.”
Then her mind wandered to Sarah. She pictured Sarah laughing at her after finding out the whole thing was a lie. This was all the motivation she needed. “I can’t let that goody-goody get the last laugh. I’m DOING this!”
At first, Katie didn’t have to drink anything. She just told everyone she was only a couple weeks pregnant. She loved all the attention she was getting. It was enough to even rival Sarah. Everyone wanted to come up and rub her belly. She let everyone do it, she loved the attention & it even tickled a little, which she liked. She did, however, sometimes have to suppress a blush, because she knew she wasn’t actually pregnant. Even Sarah wanted to rub her belly. As Sarah rubbed, Katie just looked down at her with a smirk, thinking “That’s right, Sarah, get a good feel, ‘cause me and this belly are gonna dethrone you as queen of the school.”
It was Sarah’s turn to surprise Katie. Sarah looked at Katies tummy in fascination, fingering it slowly. “Wow, Katie,” said Sarah, “I never noticed what great abs you have…it’ll be a shame to lose them because of your pregnancy.” She looked up at Katie.
Flustered, Katie averted her gaze, blushing slightly.  “Yeah, well, you know….,” she muttered.
Katie couldn’t tell if Sarah was teasing her, or just being nice. She was sort of a nice girl by nature. There was no way Sarah could have known of Katie’s plan. The incident only made Katie more determined.
As the weeks dragged on, Katie knew she was drawing ever closer to the time when she would have to start drinking to get herself big enough to be convincing. In the first couple months, she had just pushed it out herself to make it look like she was a bit pregnant. It was now getting into November-the 4th month-and Katie had to make a few long trips to the water fountain each day, in addition to pushing out, to be convincing. Sarah’s leg had completely healed at this point. The break hadn’t been very bad to begin with. This just meant Katie got that much more attention.  Now Katie’s books were being carried, people were holding the door for her-it was a complete reversal, and Katie noticed even Sarah was beginning to look a bit jealous. As things progressed into December-the 5th month-Katie had to start taking a couple large bottles of juice with her each day, which she would drink secretly in the bathroom. Katie had binged on occasion before, so, while uncomfortable, she was able to manage. The only problem was the bigger her belly got, the more people wanted to rub it, which was becoming increasingly uncomfortable for Katie. She practiced over Christmas break by drinking ¾ of a gallon of milk twice a day. Much to her dismay, Katie realized that, having started in August, she’d have to keep this up all year. It would be worth it, she told herself. Sarah was looking increasingly pouty every time she saw Katie. Katie read that in the sixth month-January-the belly starts to grow more rapidly. She was now taking a gallon of milk and a twelve-pack of soda with her every day, which she snuck in the bathroom. It was taking hear nearly the whole lunch period to drink it all, and she still had to make stops at the fountain and push out as much as she could. By the middle of February-the seventh month-her clothes were becoming unbearably tight whenever she finished drinking. She now had to drink in two sessions; one before school, to take the appearance when she arrived, and another at lunch, to keep it up when the first batch started digesting. So Katie was now drinking 2 gallons of milk and 24 cans of soda per day, in addition to lengthier water fountain trips. Her size 6 jeans were now getting so tight she could hardly stand it. It felt like she had an anaconda squeezing her belly all day. One day Katie was coming out of the bathroom after her usual drinks. The door swings open. “Oh Gawd,” Katie groaned, “I feel like I’m gonna explode.” She hiccupped, and staggered to one side.
“Hey look, it’s Katie!” one girl exclaimed, and about five other girls rushed over to Katie. Everyone could now see Katie coming from a mile away. Her jeans were on the verge of bursting at the seams, and were always unbuttoned, and her tiny, skin tight (now considerably more skin-tight) shirts were riding so high on her swollen, distended belly, that you could easily see her belly button. She was walking in a sort of waddle now, too, partly out of discomfort. The group of girls pleaded to rub her belly. Katie looked around to make sure Sarah was watching. She was. “Ok,” Katie said confidently, ‘Rub away. Katie would live to regret this. All of the girls began rubbing her belly at once, which was very sensitive, being so incredibly swollen.
“I think I’m gonna be sick,” she thought. All the rubbing was shaking up the liquid in Katie’s belly. What did the girls know? They thought it was a baby.
“I think I just felt it kick!” one of them exclaimed. This was actually a large mass of carbon dioxide moving through Katie’s belly because of all the shaking. Katie was so uncomfortable that she had to make an escape. “You guys, I really think I need to get to cl-BUUUUUUURP!”
Katie let out a window rattling belch that left the other girls staring in amazement. “Like I said,” said Katie, composing herself, “I really should be in class. Katie continued to waddle agonizingly to class. She was now getting so big and full of liquid that she could hear it sloshing around inside her with every step she took. She would also periodically release massive belches because of the tremendous amount of carbonation in her belly. When she entered the classroom, something else occurred to her.
“Oh no, I forgot about the chairs,” she whined. In this class, they had to sit in the chairs with the writing surface hinged to the chair frame. In other words, not much room. Katie tried squeezing into her seat. It took great effort, and the result was not very pleasant. Her belly was now digging into the desk. Her poor, sensitive, liquid engorged belly was being squeezed like an over-ripe blueberry. Katie’s belly was now approaching 45 inches. A far cry from her slender tummy, which once slipped easily into her now bursting size 6 jeans. You couldn’t even tell she had abs anymore, it was so stretched out. Katie needed help after class to free herself from the belly-binding chair. The teacher suggested she sit in his normal chair from now on.
Only 2 more months to go, Katie said, marking the last day of February off her calendar. She was now having to drink constantly to keep it big enough that nobody would suspect anything. Sarah was getting so jealous of Katie’s attention that she wouldn’t even talk to her anymore. Katie loved this.
Katie’s belly was getting used to being so stretched out that she would occasionally drink too much on accident.
A day near the end of march-the 8th month-
“Katie, are you sure you’re not having twins?” Asked one of her teachers
“uh…yes, actually, she replied sheepishly. Katie was just digging herself a bigger hole. She was now spending upwards of half an hour at the water fountain. Sometimes entire lines would form behind her.
“Come on, what’s the holdup?” someone would yell from back in the line. Katie would finish, belch, turn around, and exclaim “What, you’ve, ugh, never seen a pregnant lady before?” She would then waddle off with both hands wrapped around her poor belly.
At the last month, Katie still had to do one thing.
“I have to get my bellybutton to pop out,” she said. Katie brought extra liquids to school with her. She sat in the bathroom chugging every last bit. It was more than she’d ever had before, and she actually felt like she was going to burst. As she downed the last bit, she felt an odd sensation on her stomach. She reached out around her poor swollen belly and felt a tiny bump where her belly button should be. She could barely reach it, and she couldn’t see without the aid of a mirror. Heck, she’d lost sight of her feet long ago. Her arms, legs, and face were all still slender. They had accumulated a slight layer of fat, though, due to the calories from the milk and soda. She opened the door to look at her bellybutton in the mirror. What she saw was Sarah standing in front of her. Katie had spent too long in the bathroom. The empty containers were still littered on the floor.
 “Hi Sarah,” Katie said shyly. She hoped Sarah didn’t suspect anything.
“Oh, hi, Katie,” she replied. “I see your bellybutton finally popped out,” she said, pointing at Katie’s massively swollen belly. “You know,” said Sarah, “You’ll probably think this is crazy, but I used to think you were pretending to be pregnant.”
“What?” said Katie with a nervous laugh, “That IS crazy.”
“Hey, Katie, I’ve got this special formula for pregnant women that I brought for you, if you want it. I can bring you some every day. It’s no problem.”
“Uh, sure, thanks!” Katie replied.
“Here it is,” said Sarah, digging through her backpack. “Drink up.” Sarah presented Katie with a bottle of some sort of liquid. Right now, Katie felt like she would seriously explode if she drank another drop, but she had to force this down as well. She didn’t want Sarah suspecting anything.
In pain, Katie finished the drink.
“How was it?” Sarah asked curiously.
“Actually, that was really good.” Katie replied.
“I know, right?” Sarah suddenly became very happy. “I just can’t wait to see that baby of yours,” Sarah said, beginning to pat Katie’s aching belly rather vigorously. This irritated the contents of her belly, and Katy had to repress a massive belch. After Sarah left, Katy wondered if she had meant to pat her stomach so hard.
Over the remaining month, Sarah brought Katie her ‘special drink’ every day. Katie began to find walking more difficult, but credited this to the increasing amount of liquid she had to force herself to drink. The once svelte cheer captain, Katie, had to switch to sweats (and even those were running out of stretch) and walking up a small flight of stairs was now enough to make her winded. Katie was beginning to fill out. Her cheeks were plumping, her legs & thighs were softening, her arms were getting larger, she began to get a double chin. She was even getting love handles spilling over her already exploding jeans. Finally, her ‘due date’ came, and she simply let the liquid digest over the weekend. “Wow, it’ll sure be nice to finally get back in my old clothes.” She went to get dressed for school on Monday, but to her shock, her pants weren’t even close to being able to button. Her shirts wouldn’t even cover the initial bulge of her stomach. ‘What’s going on!?” she cried, “I only weigh 120 pounds,” she said, running to the bathroom scale. When Katie stepped onto the bathroom scale, her eyes nearly popped out of her head. Instead of the usual 120, the scale was reading 180. “What! It must have been something in that junk Sarah kept giving me! She DID know!! She must have known I dropped her on purpose.”
Katie arrived at school hopelessly squeezed into her old clothes, which were nearly bursting.
“You!” she cried, storming up to Sarah, who was grinning like the Cheshire cat.
“What is this!?” Katie screamed, grabbing a roll of her own belly fat.
“Oh, don’t you know, sweetie?” Sarah chirped in a motherly tone, “That’s your post-baby weight.”
Sarah, with a wry smile, turned to leave. She stopped after a few steps, with her back to Katie.
“Oh, and by the way…this will guarantee that you’re nowhere near the top of the pyramid ever again.”
She left cackling.