'Hey..pool is open! Come on over and swim!'

Heather Downing had just gotten home from work when she saw the text from her next door neighbor Erin.

Heather peeked out the window and saw Erin outside along with her 12 year old daughter Grace by their pool.

"That actually sounds refreshing" Heather thought. 'Sure! I'll be over in a few' she texted back.

Heather was dressed up from work. Low heels, black dress pants and a white blouse, which she quickly got out of.

She dug into her dresser drawers and pulled out a black one piece.

Heather was 49. Divorced with her daughter in college but still living at home. She stood 5'6" and wasn't in bad shape but she definitely had a Mom bod. She had brown eyes and shoulder length brown hair that she currently pulled back into a ponytail.

She stepped into the tight suit and worked it on, snapping it into place.

She grabbed a beach towel, slipped on a pair of flip flops, grabbed her sunglasses and phone and headed out.

Erin saw her neighbor coming and she waved. "Hey! It was so hot today and Grace had Cross Country practice and was overheated so, we figured we would jump in"

It was early September but in the upper 80s that day.

Erin Harris was 42. She had 12 year old Grace and 15 year old Grant along with her husband John.

Heather had known both the kids their whole lives. Her daughter Sierra had babysat both of them. "Oh it sounded good to me when I saw your text" she laughed as she put all of her stuff on an empty chair.

The Harris' 2 digs were nearby and came up to Heather to say Hello and get pets.

Erin was tiny; 5'1" and barely over 100 pounds. She ran marathons and trained constantly keeping her in shape and her daughter was her mini me.

Both were wearing bikinis in the pool. Erin's was blue and white while Grace's was pink.

Heather used the ladder and got in. The water was nice and warm and refreshing. The water came up to just below her breasts as she walked around getting acclimated.

"So how's school going so far?" Heather asked Grace.

Grace just shot her Mom a look.

"You can tell her, you know she knows…Not great…but I'll let her tell you" Erin said just shaking her head.

"Well you know Kendall Morrow" Grace said.

"Yeah…she's been over here…"

"Well she's been picking on me and making fun of me because I'm small and I haven't really…" she trailed off.

"Kids can be so mean" Erin said. "Kendall has been her friend since 1st grade and now she pulls this…"

"They can be mean Grace. Trust me, I went through this with Sierra when she was in 7th grade too. Something about that age. Kids in 7th and 8th grade are the absolute worst. You think someone is your friend and they stab you in the back. Sierra could tell you stories. You are not alone. Ignore her, forget about her. I'm sure you have other friends" Heather said reassuringly.

"I went through this several times. If you were to ask around, so many girls go through this" Heather added.

Erin had confided in her that Grace was later than most girls in her class in going into puberty and getting her growth spurt. But, Erin also didn't expect her to ever go into much of a growth spurt, she was going to be tiny just like her.

"There's also a lot more homework and I don't like Mrs. Conners" Grace said.

Heather laughed "No one likes Mrs. Conners. Ever. I heard horror stories of her before Sierra was in her class and ever since. Just survive her class and move on" she laughed "You got this"

Heather ducked down going under to her chin as Grace hovered around her talking.

"So is work going good for you?" Erin asked her.

Heather shrugged "Eh. You know…same old stuff. Sales are down, pressure from my boss" she replied. "But now they're talking about letting people go if things don't pick up"

"Oh no" Erin said.

"Yeah…definitely a concern" Heather chuckled dryly before she dipped underwater and came up floating on her back.

Grace was swimming by her and she heard the splashing muffled as her ears were underwater.

She stood back up and slicked her hair back "Everyone has problems" she looked at Grace "Work, school, bullies…"

"I wish I had your problems instead of mine" Grace said "I think I could handle yours better than my own"

Heather laughed a genuine laugh "Well I wish I had your problems instead of mine. I know I could handle them!"

"Haha…don't be too sure about that!" Grace replied with a sly smile.

Heather got the strangest sensation as a pervasive thought suddenly popped to mind. "What if it were me? What if I were the 12 year old here?" She looked over at Grace and for a moment, she saw herself clearly bobbing there in the pool.

Her stomach fluttered hard, she blushed as thoughts of being Grace Harris filled her mind. She could see it. She could feel it. And not just a day. She saw a whole life laid out in front of her, a life as Grace, her future.

She shivered and Grace laughed as she was just a few feet away "Did you get cold?" She asked.

"Just a little chill coming out was all" Heather laughed but her gaze remained on Grace.

"She's so small and so young…to have homework and a bitchy girl as my problems" she thought.

Grace dove under the water and opened her eyes. She looked across and was confused. Her brain and eyes were sending conflicting messages. She was just a few feet away from Heather so she should be seeing Heather's legs underwater.  But what she did see was a pair of super short and skinny legs. Heather's feet should be planted flat on the bottom but these toes were pointed and, just the tips of these very small feet were touching.

Grace traced the legs up. Skinny…legs like her own…pink bikini bottom!" She broke back through the surface and took a gasping breath while flapping her hands.

Once she refocused, she saw it was Heather.

"My eyes were playing tricks on me" she decided. "But it looked like Heather was me"

Grace floated on her back. She looked down with her chin to her chest at her skinny little self and thought "What if I were Heather?" and butterflies erupted in her stomach "Ohmygosh! That was weird!" She thought immediately but after that initial wash, she wanted to think about it more. She wanted to dig deeper.

She could hear her Mom and Heather talking "What if Mom was talking to me like that?"

She closed her eyes and she could see it. She was in Heather's body. She floated holding perfectly still and put herself in Heather. She could feel it. She could feel how different her body felt. Big, mature, taller. How the suit felt against her stomach and boobs. How the bottom of the pool felt against the soles of her feet.

She could hear what her voice would sound like inside her head when she spoke.

She heard the questions; adult questions and she was giving adult answers.

She had put herself in Heather. And she liked it. Her stomach was flipping and fluttering like crazy.

"What if I switched places with Heather?" She thought and then it was all there. She could see it clearly. A moment so precise. It was her but she was so much bigger and scrambling for a towel. She could feel parts of her body that never moved, moving like crazy.

Her chest and stomach, her butt and thighs. She could see her pink bikini torn into shreds lying on the wet concrete.

Then she saw herself. From the outside. She was looking at herself. Her little face was one of pure shock. But more confusing than that, she was wearing Heather's black bathing suit. It was huge on her and hanging off.

Grace popped up from her back and bobbed upright to show her head, clearing her ears.

Her brother Grant was coming out. "Hey Mom! Did you forget you need to take me to golf practice?"

"Shit!" Erin replied immediately hauling herself up the ladder and out of the pool. "Yes…I forgot!" She was drying off.

Heather and Grace shared a smile. "Hey Heather…would you mind staying with Grace while I run Grant to practice…Thanks!" She was already replying as Heather nodded her head.

Erin threw a t-shirt on and wrapped a towel around her waist as she headed to the car. They could hear Grant complaining about being late as the doors closed and they pulled out.

"Haha" Grace laughed.

"Oops" Heather added.

Grace grabbed a ball and they started to toss it back and forth.

"So…this Kendall girl. She's the redhead right?" Heather asked.

"Yeah" Grace replied.

"Oh I could totally take her in a fight haha" Heather laughed.

"I'd love to see that!" Grace replied.

"Well not like this haha…I'd get arrested for fighting a kid!" Heather laughed. "I was just, it's…it's nothing!"

"No…now I'm curious! What are you talking about?" Grace asked.

"No, you'll think it's silly and stupid!" Heather replied. She was blushing and embarrassed but something made her say it originally and something was urging her to share this. She couldn't explain why, she blurted out "Because for some reason I pictured that the two of us switched places and if I were in your body…I was thinking if I could beat her up"

Grace went pale white and her jaw dropped and her eyes went wide in shock.

"Are you okay Grace?" Heather asked.

Grace squealed. "OHMYGOSH Heather! SQUUUUEEEEE!!! You are NOT going to believe this but I have been thinking the exact same thing!" She yelled out in an excited rush of words.

Heather's brow furrowed.

"I've been thinking the same thing! What if we switched places?!"

"Oh haha!...well that's awesome!" Heather laughed. "Very odd though" Heather was getting a numb, queasy feeling.

"I know right?! Why would both of us be thinking about something like that?" Grace added.

"Well we both were talking about our problems and then we mentioned having each other's problems. That's what made me think about it" Heather explained.

"I'd do it" Grace said in a matter of fact tone. She raised her eyebrows and gave her a look.

That look alone shook something deep inside Heather giving her a tingling sensation throughout her entire body. "I'm going to be her" immediately flashed in her mind.

Heather felt her mouth watering, she didn't know what to say. This 12 year old girl had disarmed her and put her on her heels.

"What?" Heather asked weakly.

Grace bounded closer "I said I'd do it. I would switch places with you"

"But why? So you would turn into an old fat lady!" Heather replied.

"You’re not old or fat!" Grace immediately replied.

"I'm 37 years older than you! I held you the day you came home from the hospital as a baby…" Heather said. "Why would you want to be me?"

"Why would you want to be me?" Grace asked. "Going back to middle school?! Why?! Middle school and being 12 is the worst thing in the world! Why would you willingly want to be there?"

"I…I don't know haha" Heather laughed and shrugged throwing up her hands "It just hit me that I could solve your problems"

"And I think I could solve yours! You need a fresh set of eyes…new ideas and energy and I would love to be an adult!" Grace responded enthusiastically.

Heather shook her head and laughed "This is impossible. People don't just swap bodies. I can't just become a kid again, let alone become you and you can't just age up to almost 50!"

"But what if we could?" Grace kept pushing "If we could…would you?"

Heather hesitated. Her jaw flapped but no sound came out and Grace's smile and look drew more excitement, filled with anticipation. She nodded, encouraging her "Come on…just say it…like you said it's impossible for it to actually happen so what does it hurt to admit that you genuinely want to switch places with me. You want to be me and you want to watch me be you"

"How…?" Heather managed to say.

"Because that's what I want. I want to be you and I want to see you be me" Grace admitted. "Did you already picture it happening like I did a few minutes ago?" Seeing Heather's face pale white with shock answered Grace's question "You did!" She gasped.

Heather blushed.

Grace bounced past and got to the ladder and got out. Heather followed her out and they stood on the driveway dripping wet, compelled to compare each other.

"She's so little and skinny!" Heather thought. Her heart was pounding.

"She's so big and mature!" Grace thought. Her heart began to pound in her tiny chest. "I'm going to be her. In a few minutes… that will be me" the thought thundered in her head. "It has to be me"

Heather stared at the dripping wet girl in front of her "That’s the real me" she thought. A thought that was so sure and concrete.

They looked into each other's eyes, compelled and controlled by some other worldly compulsion, knowing with certainty that what they were about to say would make it happen..

"I wish I could switch places with you" they said in unison, in one voice, in one mind.

Both of them shivered so hard, it looked like convulsions.

"Ohmygosh!" Heather said.

"Ohmygod!" Grace said.

They looked at each other. Their eyes widened in shock and their jaws dropped.

"Why do you sound like me?" Grace shockingly asked, noting that her voice sounded very different too; deep and mature sounding while Heather's sounded high pitched, like a little kid's voice.

"Why do you sound like me?!" Heather replied. She showed even more shock on her face hearing it again. "How am I talking like this?! How am I doing this?!" She flapped her hands anxiously.

Grace froze seeing Heather making the gesture, it was something she did often, so often that her Mom and Dad told her to stop doing it.

Heather froze realizing she was doing it. She stared at her hands, her elbows bent and her hands up close to her breasts.

"Do you realize what this means Heather?" Grace asked slowly, both of them hearing her deep adult voice.

Heather nodded. She had an expression of fear mixed with excitement and wonder "I'm going to be you!" She squealed out and started bouncing up and down like a child. Heather had the energy and mentality of a 12 year old.

But her body was still nearly 50. Her boobs and stomach and ass and thighs all jiggled as she bounced on the balls of her feet.

Grace smiled and nodded, putting her hands on her hips, already feeling much more mature. She nodded with a big smile on her face. The look behind the eyes simply did not match the juvenile features of the face.

"Oh my God Heather…and I'm going to become you!"

Grace looked down at her skinny self "Goodbye flat chest…goodbye stupid middle school problems" she added "I can’t believe I am going to have your body…your life!"

Everything on her felt like it was vibrating, quivering in anticipation, on the cusp of just exploding out in growth.

Heather felt her body tensing up, vibrating, quivering in anticipation, on the cusp of everything shrinking down.

She was about to lose her maturity, her body, her job. She was about to go all the way back to being a little kid, a 12 year old middle school student. She couldn't believe it was possible and that it was going to happen to her. She would be watching someone else live what had been her life. Someone else controlling her body.

Grace shivered and shuddered and felt her back and shoulders start to spread out wider and larger.

Her jaw dropped and Heather squealed once she detected the movement "Ohmygod it's happening!"

She started to bounce and hop and flap her arms again in excitement.

Heather felt her knees ache and pop as she bounced. Then she froze up. She tensed up and shivered and shuddered all over and she began to shrink.

Standing perfectly still, she could tell she was moving. Things around her were moving; moving up, getting bigger around her.

Grace reared back as her eyes registered movement in front of her. She could already tell things were different for both of them, between them. "You’re Shrinking!" Grace yelled.

"You’re Growing!" Heather replied.

Wearing a bikini that was tied up tightly, Grace was instantly aware of her chest starting to grow. The strings dug into her sides immediately.

Everything on Grace was starting to move and change all at once.

She could feel her feet spreading, moving against the concrete as her legs lengthened and her bikini bottom grew tight. "Aaaaaaaaaaaaaaaahhhhhhh!" She exclaimed, putting her arms out in front of her and watching her hands move farther away.

The triangles of fabric felt suctioned to her chest and she remembered her vision. She realized it was about to come true; she was going to shred her bikini to pieces as she grew. She spotted the towel a few feet away but made no move for it yet.

Heather hiccuped and felt her chest contract. Her hips were slimming, her ass was flattening. She felt the soles of her feet sliding inward across the concrete. Her toes slipped backwards as the soles of her feet grew softer. So many years of use and abuse were leaving, and leaving her with soft, tiny, delicate feet.

Her toes shrank back a bit and popped up straighter with thin little nails.

Heather looked at her hands which were shrinking down before her eyes. "They’re so little!" She said spreading her fingers apart even as they continued getting smaller.

Her hands shimmied and blurred, they were shrinking down quickly. Her fingers pulled down, straightening out as they went down. Her nails thinned and trimmed down severely and just like that, Heather had the hands of a little girl again.

Looking beyond her hands, Heather saw Grace.

Grace felt her body inflating; everything was getting bigger.

Her feet spread out wider as the skin on her soles and heels toughened up. Her toes strained growing longer and wider as the nails atop them thickened and morphed to Heather's size and shape.

Her ankles puffed and her calves thickened.

Her longer arms were also growing heavier as she pulled her hands up closer to watch them change.

Her fingers stretched outward, her muscles straining, her joints popping as her fingers thickened. Her nails grew larger and longer atop them as her hands puffed out.

Grace looked beyond her hands and saw Heather.

"Aaaaaaaaahhhhh!" They both screamed out as only about 2 inches now separated them.

Heather was still taller, but only slightly.

Grace was getting bigger. Heather was getting smaller. Their bodies and faces were changing more and more, turning them into the other.

Heather looked downward and saw Grace's thighs steadily growing larger.

She felt the bottom of her swimsuit shift and droop. She looked down and saw her own legs getting thinner. "Our legs are about the same size" she thought.

Heather ran a hand over her middle and hit more fabric than belly "Ohmygosh Grace! You're almost as tall as me!"

Grace nodded emphatically "I see that! I'm going to overtake you any second now"

"I can’t wait for you to be bigger than me" Heather admitted as she saw them coming equal to each other.

Eye to eye, they looked like twins, identical for that moment. The tipping point of half their old self, half their new self.

Heather stile a quick glance at Grace's budding chest but once she felt that unmistakable sensation of shrinking hit her again, she looked up just in time to see Grace pull up taller than her.

Barely at first, then an inch, and then another and Heather was 2 inches shorter than Grace and still shrinking.

Grace was concentrating on Heather's face. Her age was undetermined at that point, woman or child, it was fluid. Then her eyes trained down ever so slightly. Her eyes met Heather's as she felt the unmistakable surge lift her up once again.

Her jaw dropped in joy as she lifted up taller and taller, increasing her height and rising up past Heather's.

A full 2 inches taller now and still growing. It would eventually become a 10 inch height difference between them. A full reversal of their heights.

Heather was at an even 5 feet tall. Her suit was clinging and hanging on only due to the material as she shrank down inside of it. It was loose and baggy on her already and she knew she still had a long way to go.

Grace was at 5'2". Her suit was ready to burst. "Hhnnggg" she grunted as maturity really started to kick in.

Strings pulled as taut as they could but as Grace's ass and hips continued to grow <Snap> <Snap> "WWHHAAAA!" Grace jumped as her bikini bottoms burst apart at the seams.

Her thighs were still getting rounder and larger as her hips spread and her ass now inflated, changing shape incredibly from that of a 12 year old into that of a 49 year old Mom.

Flesh and mass built up pushing her cheeks out bigger and bigger. Round at first, age and gravity kicked in as it took on Heather's true shape and thickness.

While her bottom half filled out, her top half was growing too.

Grace's stomach started to puff up and out, getting bigger and softer. Her upper arms doubled in size; maybe even more than doubled.

She could hear and definitely feel the strain on her chest.

Heather, meanwhile, was just still shrinking away in size and years.

She put her arms up as they halved in size "So stinking skinny" she commented seeing her arms slim down so drastically. Her tiny hands crept back closer as her arms shrank back shorter.

A brand new wave of excitement and butterflies hit her just feeling her body getting so small. She gasped as Grace's ass broke out and shredded her bikini bottoms.

To Heather's eyes, it seemed like she was watching in slow motion. It was mesmerizing to see Grace's rear growing and changing so dramatically right there.

The whole area was growing and changing in every way imaginable. From skin tone to stretch marks, dimples appearing as everything stretched out bigger.

Grace's thighs were full size; Heather could confirm. "That is definitely my ass" she confirmed in her head.

Her own body felt so light and slight that it bounced up and down.

It felt very different from the time before. Not nearly as much jiggling. Her shrinking breasts barely moved, enough that she knew she still had some, but barely.

She could easily see down the front of her suit. Her breasts were as small as they had been 30 years earlier. Her stomach was pulling flat beneath them.

Heather's skinny little stick legs poked out from huge leg holes as her thighs had shrunk down to become Grace's legs.

The muscles were taut and coiled but no excess fat remained.

Her ass and hips were non-existent.

Grace grimaced as her breasts took off. The bikini top stretched and strained before <Snap> <Snap> the shoulder straps gave way and the triangles folded down.

Grace's expanding chest swallowed them up as the remaining straps dug into her sides. She could feel the damp fabric rolling against her growing underboob areas.

Her nipples and areolas spread and grew as her breasts grew huge and pendulous on her wider chest.

Finally as she let out a breath, <Snap> the rest of her top ripped off and the garment fluttered to the ground.

Grace threw her left arm over her still growing breasts. She felt their soft yet firm mass press against her arm.

"It's nothing I haven't seen" she heard coming her way but from below.

Heather giggled at Grace's modesty but the truth was that as they continued growing and shrinking, those huge boobs were now right in Heather's face.

"Ohmygosh you're right" she replied looking down and being shocked by just how small Heather had become.

Heather's chest dwindled, getting smaller and flatter until her suit simply hung on her by the shoulder straps. Their leg holes hung halfway down her thighs, almost down to her knees and there was nothing else left to hold anything else up.

Heather looked up and Grace looked down, both watching the other's face as those changes began to occur.

With a shimmer, Heather's entire head shrank down smaller. Grace blinked hard seeing it happen but then felt an odd floating numb sensation of her own as her head grew to better suit her new size and body.

Both of them did a double take as just that change in size, changed their looks.

Heather's face broadened but her features flattened. Her nose shrank down extremely small, button like as freckles broke out all over her face.

Grace watched in awe as all of Heather's wrinkles evaporated. Her eyes opened wider, her brown eyes turned blue.

Heather could feel her face tingling. Her chin and her cheeks tickled; her lips were numb.

She was also simply awed by seeing Grace's face turn into her own.

Grace's nose grew larger, her cheeks filled out, her forehead broadened and lines and wrinkles dug into her brow, around her eyes and at her mouth.

Grace's eyes narrowed and changed color from blue to brown. Her eyebrows thickened while her eyelashes thinned.

Heather felt her hair shifting. It grew longer and thinner, lightening from brown to a strawberry blonde as it brushed against her changing ears and neck.

Grace's hair thickened and pulled up shorter, darkening as it went.

The styles changed. Grace grew out Heather's bangs and Heather's pulled to the side as it became parted down the middle.

Their teeth and tongues were changing. Small details came to the forefront, filling in small but vital details.

Both of them suddenly froze up. They both threw their heads all the way back as warmth coursed through them.

A chill followed and they both came to with a shiver.

"Ah!" Grace yelped as she hopped sideways and grabbed a towel. She covered herself up hastily while staring down at the child before her incredulously.

Heather just stared upwards, her jaw hanging in disbelief at the woman before her.

"I'm you" she said in a hushed tone.

Grace bit her lower lip and shuffled her feet as she nodded.

She rubbed her right foot atop her left as she replied "And I'm you" which came out shaky and nervous sounding.

"It worked…" Heather said, putting her hands out and turning them back and forth. "I didn't think it was possible"

"We wished for it and…haha…wow" Grace was craning her neck and looking over her shoulder at her back and ass.

Then, in the blink of an eye and with quick shocked exclamations from both of them, their clothes swapped.

Suddenly, Grace felt held in. Damp. A black swimsuit was on her body and covering her.

Heather looked down amazed to be in a tiny pink bikini. It was restored and she was wearing it like nothing had happened. Like she had been Grace all along.

"What the…?!" Grace said, dropping her towel and touching around her suit before she started to laugh.

She put her hands on her stomach and ran them over back to her hips.

Heather plucked at her super tight bikini strings as she laughed "Kendall better watch out…I'm going to take her down!" She announced.

"I bet you will" Grace chuckled "Meanwhile,I can absolutely handle your job"

"I'm glad it's you" Heather admitted "I couldn't do it anymore"

"Well I'm glad to do it! I'm just happy it's you dealing with school now instead of me"

"Oh…any day of the week! I would pick this…" she ran her hands up and down "...over that…" she pointed up at Grace "All day every day!"

"Me too honey…me too" Grace agreed "I couldn't be happier with what just happened to me…to us!"