It was July summer afternoon with the sun beaming bright in a cloudless sky. In a suburban area with plenty of assorted rows of houses, there was a blue two-story house with a mailbox labeled Collins. Behind that house lied a spacious white picket fenced backyard with a tree. In that tree lied a wooden treehouse with a red roof, a couple of open red shutter windows, and a rope ladder attached to the bottom door hatch.
Inside there were some video game related posters and some science bases ones, including a beaker of bubbling liquid and a rocket in space among the stars. Along the left wall beneath a window shelf of reading material, mainly comic books, video game and science fiction magazines. In the back was a small science lab table with some beakers and test tubes filled with multicolored liquid along with some cardboard crafts and gadgets strewn about. 
On the right side of the treehouse there was a desk with a lamp on top with a pencil holder filled with writing utensils. Sitting at that desk in a purple bean bag chair was a ten-year-old black and white border collie pup named Tyrone ‘Roni’ Collins who wore nothing but a pair of white briefs, a large lab coat and a pair of goggles. He was working on blueprint schematics for a sci-fi looking ray gun called ‘Zig Zag Zap (WIP)’.  Everything was normal until… 
*BOOOM!
“WAH!” Roni cried almost falling out of his seat.
Looking outside the window, dark clouds were quickly gathering and approaching, blanketing the sky. Soon, the sun was completely covered, darkening the neighborhood within minutes. The wind picked up a bit as the trees began to sway, disturbing the branches and even his fur and blueprint. Strange, the weather app on his phone didn’t call for a storm today. It was supposed to be clear and sunny! Still, he had to get back into the house before it starts to rain.
He quickly shut the windows and rolled up the schematic. He opened the hatch and descended the rope ladder. But as soon as he got to the ground…
*FLASH!
*BOOOOM!
A streak of lightning illuminated the darkened sky followed by deafening roar of thunder. Roni flinched and winced as his ears folded back in fright. He had to get to the house before…
*PHHHSSHHHH!
Suddenly, a heavy downpour began, drenching everything immediately. Great, now he had to go through all that. Though mainly protected by being underneath the tree and house, the wind still whipped trickles of rain onto him. He prepped himself for the mad dash back to the house. Then, he ran, shielding himself by putting his arms over his head on reflex despite knowing it was useless. It felt like he was going through a high-pressured car wash as his fur became totally soaked.
Once he had gotten to the back porch and protected underneath the red metallic canopy, he stripped down, tossing his wet goggles, lab coat, and even his soaked underwear to the side. The now nude pup dropped to all fours and vigorously shook the water out of his fur, flinging droplets all over. 
After shaking off as much water he could, he opened the glass sliding door into the blue kitchen which had the usual fixings, counters, sink, dishwasher, microwave, stove, cabinets, and counters. He crawled over to the square wooden table with four beige placemats on top and four chairs around it. He collapsed onto his back, panting heavily and shivering. He suddenly grew hot as gaining a fever throughout his body. The commotion in the kitchen got the attention of his older brothers who were just in the den room next door who were watching TV.
“Roni, are you okay?!” said concerningly the eldest brother Cam, wearing a purple polo shirt and blue jeans, knelt next to him, followed by Jesse who wore a white muscle shirt and matching athletic shorts.
“N-no….ugh….I feel—AGH!” Roni cried out as he felt his feet cramp up as the changes began with his brothers looking on stunned in shock.
His feet cracked and stretched, becoming mature with petite toes. Then, his legs grew and lengthened into a slenderer form with toned calves and thicker thighs. 
He grunted as his hips cracked as they widened while his waist thinned out. His butt bloated a bit with a few layers of fat while his tail grew longer and fluffier. 
A moan escaped his muzzle as he felt his penis and ball sack shrunk and receded into his body, leaving a plump mature pussy in its place. 
He grunted as his torso widened as it aged. Then, he moaned as his dark nipples grew erect and puffy, increasing to quarter size in diameter. Beneath them, two mounds began to grow until they became large perky F cup tits. 
Like his legs, his arms elongated into a slender feminine form and his hands grew with thinly long fingers. 
Finally, the changes reached his head as it aged and grew while he let out a feminine moan. First, his muzzle lengthened a bit and narrowed in womanly fashion. Long wavy black hair grew and flowed down from his scalp until it reached the base of his tail.
The male pup became an adult female dog.
After the transformation, she heard her brothers call out her name before passing out. 
“*Groans….Mmm….hmmm…?”
After three hours, Roni stirred awake. Her eyes opened as the ceiling fan light shone above. Thankfully, the power wasn’t out despite stormy scene outside. She also realized that she was lying on the brown leather sofa in the den, facing the flatscreen TV on top of a black shelf with an entertainment system and library of DVDs/Blu-Rays which was turned on. It showed an alert about the strange storm occurrence and how it seemed to only effect kids that are preteen and below, mainly aging them and sometimes changing their gender, warning not to let kids outdoors for the time being. Also, due to constant flooding, many roads were closed and discouraged driving as well.
When that was mentioned, her eyes went wide, realizing that what happened earlier. She looked down to see a large blue towel covering her body. Removing the towel, two large bulbous mounds blocked her view, noting how her body now occupied over half of the four-seater couch. She cupped a tit, letting out a light moan. She reached down to her crotch to find something missing and replaced with a slit. She let out a slight gasp and shuddered as two fingers entered her cavern, experiencing how sensitive female genitals were for the first time.
She immediately stood up from the couch, only to experience a sense of vertigo thanks to her new height as everything looked smaller than before. She had to lean onto the couch for support. 
“Whoa, Roni, careful. Are you feeling alright?” her older brother Cam came out from the kitchen who was cooking a chicken noodle soup dinner. Standing next to her, Roni realized how they were close to eye level with only half a foot height difference.
“Y-yeah, I’m fine…oh!” she clasped her throat upon hearing her new deeper yet higher pitched voice for the first time. “Need to go…bathroom.”
She quickly went into the bathroom just left of the front door and across the stairs that lead to the second floor. The bathroom was standard with toilet, sink counter, and a mirror just above it. the walls were a baby blue hue with matching oval rugs. Even though she excused herself just get a good look at herself in the mirror, she still felt nature calling as it had been a while since she went. She stood in front of the toilet but realized she couldn't anymore with her new sex and had to sit down which felt awkward. 
After doing her business, she got up in front of the mirror. She was amazed about how beautiful she looked with her hands travelled down every curvy inch of her body, turning around to see more. Her fingers went through her silky wavy long hair and even fondled her fun bags for a bit, lifting and letting them bounce as they drop.
Once she was out, Cam was back cooking in the kitchen, but her other brother Jesse was in the den watching a basketball game. With a smirk, she thought of a way to tease him. Quietly going over him behind the couch, she gave him a boob hat that covered his eyes.
“Guess who?” she said with a giggled. 
“Stop it, Roni!” Jesse said with annoyance as his face turned beet red while swatting away his new sister’s breasts. 
“Sorry, big bro… or is little bro now?” she said.
“Well, at least, I still have my dick…” he uttered.
“Quit it, Roni.” Cam called out from the kitchen.
“Aww, c’mon Cam, it’s just a joke.” She replied with a slight pout.
“Just enough. Besides, dinner is almost ready and you should-“
*Ding-Dong! *Ding-Dong!
The doorbell interrupted his train of thought that also gained the attention of the border collie family.
“Now who could that be?” he said, dropping everything he was doing and heading to the front door. 
“Coming!” he said after another ring was heard.
When he opened the door, Cam’s eyes went a bit wide at an unexpected scene. At the front door stood a shivering soaked adult 6ft. akita with red and white fur. Red fur masked his ears and face sans his muzzle, going down his back to the end of his tail. White fur dominated down from his muzzle to his arms and legs to his sheathe. His was in the nude save for some tattered clothes that clung to his wet fur that seemed way too small for him.
“H-hello, can I come in? I was playing in the park nearby when in rained out of nowhere. It changed me like this, and this was the closest home nearby that I know.” Said the newcomer.
At first glance at the unannounced visitor, Roni ogled him as her heart raced and tail wagged. She couldn’t help but noticed how handsome he was from his mature muzzle to his muscular bod to even his sheathe that housed apple sized testes. Female hormones were raging within. But not too long she then knew who the akita was.
“Tr-Trevor?!” Roni exclaimed, recognizing him as a fellow classmate at school. “Is that…you?”
“Wha-? How do you-?” Trevor said, blushing as he now noticed the naked border collie lady. His dick was almost ready to unsheathe at the sight of her.
“It’s me, Roni. I got caught in the rain like you and it… made me a girl.” She said sheepishly.
“Well, you look, um… lovely.” He spoke while scratching the back of his head nervously.
“You don’t look half bad either.” Roni replied, eyeing his body more.
“Okay enough. You two come with me.” Cam interrupted. “There are some towels upstairs to dry you off, Trevor. And you and Roni can borrow some of my clothes.”
After drying off, Trevor wore one of Cam’s black muscle shirts with matching athletic shorts that fitted him well. However, the same couldn’t be said for Roni as the purple A shirt she wore barely covered her breasts, exposing her midriff while the purple shorts were a bit loose around the waist and hugged his hips tight. At least, the elasticity of the clothes didn’t cause too much discomfort.
Once the ex-kids got dressed, it was time for dinner around 5:30 in the evening as it got darker outside due to the lingering storm. They ate their chicken noodle soup with a side of PB&Js. During their dinner, however, Roni felt a gradually intensifying heat in her loins as signs of estrus was beginning to show, making her fidget in her seat a bit.
“Are you okay, Roni?” Cam asked across the dinner table.
“I- I’m fine. Just feeling a little hot that’s all.” She replied, trying not to worry her brothers further. Thankfully, Cam didn’t press the issue and continued eating. 
 After supper, they went to the den to watch some TV and movies to pass the time as the storm kept passing through. Roni sat next to Trevor as they watched, close enough to catch his scent that made her heat flare up a bit. She crossed her legs on reflex to hide it yet can’t help but take quick glances at the hunky akita. 
When it approached midnight, they decided to hit the hay and went upstairs.
“Okay, Trevor, you can stay in the guest bedroom for tonight.” Cam stated.
“Hey, he could sleep in my room!” Roni piped in. 
“Are you sure that’s okay?” Cam quizzed with concern.
“Yeah, we were just going to play video games before going to bed. Right, Trevor?”
“Um, sure, that’s fine with me.” he agreed.
“Alright, just…don’t do anything rash okay?”
“Promise!” she said.
Then, Cam and Jesse went to the left end of the hallway where Cam’s room is, and Jesse’s was adjacent to it left to the guest room, linen closet, and upstairs bathroom. The two ex-kids went on the hall’s opposite end to Roni’s room marked with a biohazard sign. 
They entered what clearly is a boy’s room. An entertainment system was set in the left side of the room with a flatscreen TV on top of two-tier shelf with a library of DVDs and video games with a Y Box hooked up to it. Right next to it was a three-tier drawer filled with clothes now too small for her. Across the doorway was a closet with a small table and desk with lab equipment including test tubes, racks, Bunsen burners, beakers, etc. Finally, to the right was a full-size bed with space themed sheets and bedding with stars and even a red rocket ship. At the foot of the bed was a blue treasure chest designed toybox filled with space and comic book action figures and toy vehicles. A purple curtained window hung above the bed with a nightstand with a lamp and a black digital alarm clock stood at the right of it.
 “So which game do you want to play?” Roni said while turning on the TV and console.
“How about this one?” Trevor replied as he sat down, taking one of the controllers while pointing to a game on the shelf.
Within an hour of playing a kart racing game, Roni could feel the heat welling up between her thighs as her pussy began to leak, soaking her brother’s boxers that she was wearing. Soon, the warmth was spreading through her body that it was becoming near unbearable, panting a bit with tongue slightly out. After finishing a race, she stood up.
“Trev? I’m feeling-haah…. way too haah-hot. Don’t mind if I…haah take off my clothes?” She said as she began to strip down, tossing them in a pile to the side, revealing her privates oozing nectar down her thighs.
Trevor looked at her nude form in awe, dropping the controller. His nose picked up her scent with his muzzle blushed a bright red as his cock unsheathed and rose into a fully eleven-inch throbbing dick, creating a massive bulge in his shorts. He couldn’t resist that hot bod of hers nor the rush of raging hormones. 
“C-can I join too?” he said as he stood up and began stripping down, releasing his manhood and making Roni feel hotter as well with tail wagging rapidly, eyeing his long meaty sausage hungrily.
Hormones took over them as they approached and embraced each other. Roni nuzzled his neck before locking muzzles with him in one long kiss. She then led them to her bed as they lied down with him on top of her, still smooching for a while.
“Trev, please, I want- I need you inside me! My body can’t take it anymore!” she pleaded as she affectionately licked him.
“But Roni, what about your brothers?” he asked with concern.
“Don’t worry about them. Their rooms are across the hall. They won’t hear a thing.” She assured him. 
“Okay, ready yourself. Here goes!” the akita said as he thrust his shaft into her sleeve, eliciting a long moan out of her.
Trevor pumped in and out if her, his penis grinding against her inner walls. Roni’s body shuddered with every jolt of pleasure; fingers dug into the sheets, gripping them hard. Her legs wrapped around him to keep stable and close. 
“Ooo~h….-Aah! Haah….Oooh…S-sweet Anubis!” she cried out between moans and pants with her tongue lolling to the side.
“Haah…Ah! Oooo~h…T-Trev…Fa-haah-ster!” Roni begged as her toes splayed and curled. 
“Unhh…! Ooo~h! O-kay!” he complied, pumping at a faster pace than before.
The bed rocked as he pounded her pussy in rapid procession, making her hold onto him tightly. Their moans and pants more frequent in throes of pleasure. They kissed passionately again while Trevor began to fondle her tits, making her feel more pleasure and sensations. She could feel the pressure mounting up within her privates, on the verge of climaxing.
“Aaa~h….oooh! O-oh dog, I-I’m….haah… oo~h! CUM-MING!” she shouted as her snatch drowned his dick in a thick coat of nectar. 
“Uhng…! Ooo~h! Y-yeah…M-me TOO!” he cried out as his hose blast a torrent of cum, filling her womb until it overflowed and leaked onto the sheets.  
Once he emptied his balls into her, he exited her with a wet plop. Exhausted, the pair quickly fell asleep. However, after nearly an hour, Roni experienced another change in her sleep.
She tossed and turned a bit as a feeling of discomfort came over her, most specifically in her abdominal area. She groaned as her belly began to slowly inflate like a balloon as twins developed into womb. Soon, she looked like she swallowed a large, ripened watermelon whole as she became nine months pregnant. Her boobs produced more milk as they gained nearly extra two cups in size. She felt them kick a bit but wasn’t enough to wake her or think that anything was wrong or off.
Morning came though still dreary but with the rain lessened overnight. 
Roni groaned and stirred awake, feeling a bit off. When she opened her eyes, she looked down, not only to see larger milky mounds but a beach ball sized belly as well. Her eyes went wide and let out a surprised yelp, unintentionally waking up her partner in bed.
“Wha…huh? Roni, what’s wr-?!” Trevor paused as he looked upon her large baby bump.
“T-Trev, I – I’m pregnant!” she exclaimed. 
“B-but how that fast?!” he said.
“I – I don’t know. Must’ve been another side effect of the rain. Oh Dog, Cam is gonna flip!”
“Well… what should we do?” he asked.
“Well, it’s impossible to hide this.” Roni gestured towards her baby bulge and just sighed. “We’re just going to explain this to him.”
She looked over towards the clock on the nightstand with the numbers blinking 9am. She heard feint noises in the kitchen downstairs, most likely Cam cooking breakfast as he usually does since, he tends to be the first one up. 
“Come on. We should get dressed.” Roni said while slowing getting up from bed.
They proceeded to put on their clothes which proved more difficult for the border collie than before as they were more ill-fitting than last night. The shirt barely covered her breasts, and the shorts barely fit thanks to her larger stomach. 
Soon, they left the room and marched downstairs with Roni leading the way. They reached the den and entered the kitchen where Cam was in the middle of making pancakes. The table was set with a stack of them on a plate with a tub of butter and a bottle of syrup next to it. Jesse was already at the table chowing down on a triple stack. Their entrance caused the two brothers to look at them, only to become wide eyed at Roni’s new body shape. Their mouths went agape as Cam almost dropped his spatula and went over to them.
“R-Roni!? Wh-what happened to you!?” he asked frantically. 
“Um…well, w-we had um…. sex last night and -“ Roni nervously uttered.
“Sex!?” he shouted, looking at Trevor accusingly with a slight growl. The akita backed away a bit afraid until Roni got between them.
“Cam, please! It wasn’t his fault. Last night… I felt so hot like a fever. I – I think I was in heat! I couldn’t help my…haah…self. I – haah….Ugh!” Roni intervened but paused as she felt her stomach cramping and then some with laborious pants, forcing her to lean on the couch. Unexpectedly, she took off the shorts and boxers, kicking them into a pile to the side, surprising everyone.
“Roni, are you okay?” Cam asked concerningly. 
“G-guys, t-the babies… I think they’re- *Psssssshhh…” 
Before Roni could finish, liquid gushed from her vagina, creating a puddle around her feet. Her water broke.
She wailed as she felt the contractions in her cervix. The others came to her aid with Cam guiding her to the couch as she panted heavily. She slowly lied down with legs spread apart, revealing a winking vulva. Trevor knelt beside her while holding her hand as she continued to pant and breath heavily. Cam was on the other side of the couch on the receiving end to catch the baby. 
“Jesse, grab some towels and wet them in warm water! Quickly!” the eldest barked.
The other brother wasted no time in doing what he was told. Roni’s cries reverberated throughout the house as she tried to push out the baby.
“Keep going, Roni. I can see the head.” 
Cam could see the head crowning along with two ears. Roni grunted and groaned with tears welling up in her eyes as she continued to push while gripping Trevor’s hand hard. Slowly but surely the baby inched its way out of Roni’s vagina. After few more pushes, it was over halfway so Cam was able to gently pull it out completely with blue umbilical attached to it.
“I-It’s a girl!” Cam said as he held her in his hands.
The newborn pup was a female that resembled an akita with a mixture of red, black, white fur, pointed ears and curly tail. 
“G-give her to me!” Roni said.
Cam did so carefully hand the pup over to her mother. Maternal instincts kicked in as Roni began cleaning the baby by licking the fluids off and bit the umbilical cord to the shock of the others. She then passed her over to Trevor as she wasn’t out of the woods yet with the other baby coming.
“Trevor, h-hold her please!” she said, handing the pup to him. 
“O-okay!” he replied, cradling her in his arms.
Jesse came with the towels not too long after. Cam ordered him to give to Trevor so he could wrap her to keep her warm and comfortable, easing her crying a bit. Roni groaned and panted as she continued to process of pushing the second baby out. 
“This one’s a boy!” Cam called as the pup was finally out.
The male pup resembled a border collie with mostly white fur but black fur on his floppy ears and tail. Like before he was handed over to Roni to be cleaned by tongue and umbilical cord bitten off. She took the warm damp towel from Jesse and wrapped the newborn in it. She cradled him, rocking him back and forth to ease his cries. 
“Trevor, can you give me her?” she asked.
He did as was told, giving her their daughter. She shushed and cooed them in her arms as motherly instincts took over again, giving them affectionate licks. Trevor looked upon his newborns with utmost awe, joining in on calming the babies. Cam watched the homely scene with a sense of disbelief and uncertainty about how his little brother became an adult mother in a day. It was going to be an eventful summer alright.
A few hours later into the afternoon after the birthing ordeal and cleaning up, Roni was in the den alone, lying down on her side on the couch facing the TV as she surfed the channels. She was only topless as her enlarged tits, but now that her baby bulge was gone the shorts fit slightly better. Her two pups were beside her, being breastfed as she held them close. Camille, her daughter, on the left tit and her son, Remi, on her right. 
She caught sight of the news while watching, tuning in to see any developments. Good news weather wise that the rain was about to stop soon by tomorrow and much of the flooding on the roads had receded. The bad news was that scientists/researchers are still trying to understand the phenomenon that occurred with the storm and a cure to reverse its effects will take more like months to obtain. Looks like school is going to be interesting this year with how they’ll go about the transformed kids and unaffected ones. However, with recent events and now a mother of two with maternal instincts and female hormones kicking in every so often, going back to being a boy seemed impossible nor desirable even if there was a cure as she was too used to this body. Trevor seemed to be in the same boat as far as she could tell, being a father and all.
“Hey, Roni? I’m going to the store to get some things. Do you need anything?” Cam said as he walked by the couch, wearing a clear poncho over his clothes of a blue polo and khakis.
“Just diapers, formula, and food for the babies, thanks.” She replied.
“Okay. I’ll be back in a few.” He stated before heading out. 
With that, Roni went back to watching tv. After half an hour, she felt her pups unlatch themselves from their tits as they let out tiny weak yawns. She looked down and smiled at them. 
“Guess it’s time to put you two to bed.” she quietly said.
Picking them up gently, she carried them upstairs to the guest room turned baby room. The room itself was standard with its blue walls and brown shag carpeting. To the left side was a two-tier black dresser drawer next to a walk-in closet. In the back, there was just a window with matching blue curtains and to the right was a full-size bed with white sheets and pillows. However, there was a new addition to the room, being a light blue crib with a mobile of a rocket ship, stars, and planets that Roni had when she was a baby that they fortunately kept it in the attic.
She placed them in the crib gently as possible, covering them with a yellow blanket. Not too long before Trevor entered the room and approached from behind, looking at his kids with a warm smile.
“So how did your mom take the news?” she quietly said.
“Well, she wasn’t happy about all this and sounded more upset that his ‘little man’ is now a big one, but at least, she was understanding and accepting.” He answered.
“That’s good, I guess. Though looks like school this year is going to be different with our conditions, judging by the news.”
“I really don’t want to think about school right now.” he groaned.
“Well, how about we do something else in the meantime to take your mind off it, hmm?” she said as she got in close to him, laying her head on his chest and nuzzled his neck with him held her close. “Maybe back in my bed? Cam won’t be back until sometime later after shopping and Jesse is sleeping in his room, so we have enough time til then.”
“But won’t you get pregnant again?” he asked.
“Call it a hunch but I think the effects of the rain has worn off. I don’t think it’ll be that extreme like last night since I just gave birth.” She placed her hand over her abdomen.
“If you say so. Besides, I’d like to go another round. It was fun!”
“*Giggles…let’s go then!”
Their muzzles locked into a passionate kiss before leaving for Roni’s room.  

THE END