[Stardew Valley ABDL] Birthday Surprise

Chapter 1
Complete Story

Chelsea grunted as she smashed yet another rock. She’d been out mining since 8AM and by her watch, it was about 10PM now. “Damn” she muttered, panting a little. She looked around the room. At least there was an elevator on this floor. She smashed a rock in front of it and was about to walk in to leave, but something caught her eye. From the rock she just smashed, there was a black ball encased in it. She used her pickaxe to carefully get rid of the rock around it.

She shrugged and tossed it in her bag. It’d be easier to see it when she got home. She took the elevator up and used the mine carts to get back closer to her house. “I hope she saved me something” she muttered, not feeling the energy to cook. She’d only eaten cheese all day, and the idea of not eating something else before bed wasn’t too enticing. Especially this late into Winter.

She opened her door, grateful for the heat of the fireplace filling the whole house. Their dog Buster was fast asleep in front of it. She’d have to thank the Wizard for that bit of magic. A fireplace that kept burning without the risk of burning the house down. “Abby?” she called out. Her wife was nowhere to be seen. She walked over to the fridge, where she found a note. “Gone to help Dad for the day, will be back late. Maki rolls in the fridge” 

Chelsea smiled. At least she didn’t have to cook. She took out the Maki rolls and sat down at the table to stuff herself as she went through the day's loot. Mostly more of the same. Amethyst for Abby, lots and lots of stone, and any random assortment of other things. Then she remembered the black ball.

Chelsea picked it up and stared at it. In the light, it was nothing short of beautiful. Perfectly smooth, a strange light in its depths almost like a fire flickering. It had to be magical in properties. She simply couldn’t believe something being this perfect by nature. Just then, the door opened and Abigail walked in. “Brrr! Looks like we’re in for a blizzard tonight” she said, immediately walking over to the fireplace. “You back long?”

Chelsea shook her head, still stuffing her face. Abby rubbed her hands together as she walked over to her. “What’s that?” she asked, looking at the black ball.

“No clue. Found it in the mines” Chelsea said. Abby picked it up and gasped. “Almost as beautiful as you” Chelsea said with a smirk, shoving another Maki roll down her gullet. Abigail snorted, but didn’t look away from it.

“It’s very pretty…” she muttered, almost staring off into space as she looked at the ball. “By the way, did you bottle the Starfruit wine like you said you would? Leah’s birthday’s tomorrow after all”

“Not yet. I’m sure it can wait till morning” Chelsea said. Abby gave her the look. She wasn’t allowed to procrastinate when other people were involved. Abby made sure of it. “Alright, I’ll go do it now” she said, getting up from the table with her Maki rolls.

Chelsea walked down into the cellar and turned the lights on. She grabbed one of the empty wine bottles and a tap to put in the barrel. This wine had been ageing almost since she first came to the farm 5 years ago. She just hoped the wine’s taste was worth the wait. Abby assured her it was, though Chelsea never really understood how she could just know. She smacked the tap into the barrel and turned the tap on.

Glancing over to the stairs to make sure Abby wasn’t looking, Chelsea finished filling the bottle and got a mouthful of the wine herself. “Oh my God that’s amazing” she whispered. She sealed the wine with a cork and walked back up. Abby was still staring into the black ball. “You alright Abby?”

Abby nodded. “Yeah… just fascinated by this thing” she said, finally putting the ball down. Abby got up from the table and made her way into their bedroom. Chelsea inspected the black ball again. It was almost like a black diamond, but perfectly rounded… And after seeing Abby so hypnotised by it, she'd definitely be taking it to the Wizard as soon as she could. Though she knew for a fact he wouldn't be at his tower tomorrow, she was sure he'd want to see it ASAP. 

Chelsea sighed and left it down."I'm over thinking this" she said. She'd worked all day in the mines. She probably just needed a good night's sleep. She went to the bedroom and got into bed. 

The next morning - 6AM

Chelsea groaned as she woke up. Her breasts felt a little sore. Being careful to not wake Abby, she got out of bed. Looking around for her clothes, she realised she never actually took them off. And that something looked weird about them. They were bigger. But no less form fitting. In fact, her breasts looked bigger. She rubbed the sleep from her eyes. They looked a LOT bigger. 

"What the hell?" she whispered. She took off her hoodie and t-shirt. She could only stare in confusion at the maternity bra that now held her breasts. She'd been a D cup already before, but now it looked like she'd grown at least 3 sizes. She heard Abby moaning in her sleep and looked at her. It took a lot of effort to not scream there and then. 

Abby was sucking a pacifier in her sleep, and was holding the black ball. "What the fuck Abby?!" she whispered. She leaned in and gently grabbed the black ball. With fresher eyes, she could clearly see that a black diamond had indeed been an accurate description last night. 

The light inside it flickered and danced much more than it had last night. Abby moaned as she woke up. Chelsea quickly took off her bra. It was only after doing so that she wondered why she'd done it. The dark purple pacifier fell out of Abby's mouth. She sleepily rubbed here eyes. "Mommy? Me hungwy" she said. 

Chelsea stood speechless. Then, as if the diamond sensed her hesitation, it lit up bright. Chelsea found her body moving on its own as she walked over to Abby and picked her up. She marvelled at her strength as she easily carried her wife out to the sofa by the fireplace. 

She sat down and Abby immediately went to a position where she could start sucking Chelsea's breasts. Her momentary confusion was quickly squashed when she felt milk flowing out of her nipple. 

"Okay Chelsea…  calm down…  this is surely just a weird… kinky dream" she whispered to herself. She pinched herself and winced at the pain. "Nope, actually happening" she whispered. It was then the she noticed Abby was wearing something odd. 

Her wife of 4 years was in a dark purple footed sleeper. It honestly looked pretty cozy. But there was a strange bulge around her butt… Chelsea took a deep breath. It had to be a diaper. She looked at the black diamond in her hand. "How did you do this?" 

Abby stopped sucking long enough for Chelsea to swap her to the other breast. She clearly didn't think anything was wrong. Until tomorrow, she had an adult sized baby to take care of. That's even if the Wizard could fix this the same day she showed him the diamond. 

Chelsea dreaded to see what else had changed. She waited until Abby had finished feeding to pick her up again. Whereas before it was the diamond that had been making her do it, she now did so of her own will. "That's a start I guess" she muttered. 

She carried Abby back into their bedroom and saw Abby's part of the room change before her very eyes. The only thing that didn't change in some way was her little hamster, David III. She'd been absolutely distraught when both David and David Jr. died within a week of each other. Chelsea had gotten her a new one and she doted on it even more than the previous David's. 

Chelsea noticed a changing table appear where her drum set had been just last night. It was stacked with all sorts of diapers. "I'm so not ready for this" Chelsea muttered as she started taking Abby's footed sleeper off. Underneath the sleeper, Abby indeed had a soaked diaper on. And also an adorable Hello Kitty bra. "Lie down for Mommy sweetie" she said. Abby complied but Chelsea was blushing. She hadn't felt like she'd been forced to say that. She just… said it. 

On the bright side, changing Abby's diaper was SO easy! It was like she'd been doing it for years. She tossed the dirty diaper in the pail and had her in a white diaper with a pattern of black skull and crossbones. Definitely fitting for her Abby. She walked over to Abby's wardrobe.

Not much had changed really. Her clothes were FAR more colourful but overall they weren't too infantile. Chelsea picked out a pink jeans with flowers embroidered on them, along with a Hello Kitty t-shirt, bra and the warmest looking fluffy jacket. 

She also grabbed Abby's purple pacifier that was still clipped to her sleeper. "Change your bra… Then we put your t-shirt on, good girl… then the jeans go on…  and zip up your jacket" Chelsea muttered each step to herself. Once Abby was dressed, Chelsea threw on a t-shirt herself, picked her up and carried her up to the sitting room to watch TV. She could at least distract her while she figured out what exactly she was supposed to do. 

Abby giggled and started singing along with Elmo as she sat on the couch. The heat from the fireplace reached the whole house thankfully. "My wife is sitting in a diaper watching Sesame Street" Chelsea muttered to herself. She glanced back at the diamond, still in her hand. "I should put you away somewhere…" 

Just then, her doorbell rang. "Fuck" Chelsea muttered, going to answer the door. Who the hell would be calling into her this early? She opened the door to see Leah. "Oh. I wasn't expecting the birthday girl to be visiting me" she said. Leah chuckled at her. 

“Abby forgot to tell you? She heard I was doing nothing for my birthday and basically forced me into some sort of day out. Hope it’s worth getting up at 5:30 to get ready for” Leah said. Chelsea invited her in, but in her head she was screaming. How the hell was she supposed to explain what had happened?!

“Uh, you want a cup of tea or coffee? Abby’s still in the shower last I saw” Chelsea said, hoping Abby wouldn’t start singing along to Sesame Street any time soon. At least now, you couldn’t really hear the TV. Leah sat down at the kitchen table.

“Uh… coffee please… that’s a weird looking stone in your hand” she remarked, staring at the black diamond. Chelsea cursed herself for not hiding it as she boiled the kettle.

“Uh yeah… Afraid I don’t know what it is though” she said, putting it in her pocket. “Sugar and milk?” she asked, turning to Leah. Chelsea groaned quietly as she saw Leah was now sucking her thumb as she stared at the pocket where the diamond was.

“Uhm… can I have boobie miwk pwease?” Leah asked, mesmerised by the diamond despite not being able to see it. Just then, Abby started singing along to Sesame Street. Leah smiled. “Mommy? Can I watch Sesame Stweet too?” she asked.

Chelsea sighed. “Sure sweetie” she said, picking Leah up. Leah’s clothes were relatively unchanged, though Chelsea could hear something crinkling under her pants. Whether that was a diaper or a pullup, she didn’t know yet. “Find out soon enough” she whispered, walking up to the sitting room.

Abby had moved down to sit on the floor, enraptured by Elmo and Big Bird singing. She sat down on the couch and helped Leah get into a comfortable position before taking her t-shirt off and letting Leah start drinking her milk. “Why me?” she muttered to herself. She watched as Leah’s clothes regressed. She was now in a yellow t-shirt and overalls. Her braided ponytail split into braided pigtails.

Once Leah was finished feeding, she snuggled up to Chelsea and watched Sesame Street. Abby clearly got a little jealous, getting up from the floor to cuddle with her too. Chelsea sat there, nude from the waist up with 2 grown women cuddling her and acting like babies. She had to admit, she definitely felt a genuine motherly love for the girls. Even if it was just the diamond making her feel that way.

“Mommy? Can me an’ Abby go pway in the snow watew?” Leah asked. Chelsea found herself chuckling. The girls loved playing in the snow. She thought back to last year when Abby pulled Leah around on a sled and Leah got snow in her diaper. She cried about it but still refused to come inside. Chelsea shivered. That never happened. None of that ever happened. 

“Sure pumpkin. But it’s still too cold outside” she said. She noticed a small glimmer of light shining through her pants. Abby and Leah were both suddenly holding Teddy bears as they giggled and started singing with the childrens show again.

Chelsea looked over to the spare room. Her and Abby had been considering adopting a baby recently. Robin had installed a crib for them since she was ‘certain they would have a little bundle of joy before the Spring’. She saw the room had changed quite a bit. It now looked like a nursery. There were toys EVERYWHERE. She’d have to be careful to not hurt herself. She glanced at the clock above the TV. Only 6:30AM.

Abby and Leah would have to go down for an early nap. It was way too early for 2 little babies like them to be up. She shook her head. They weren’t babies. They were full grown adult women. “I need some air” she whispered to herself. Despite how guilty she felt for doing so, Chelsea got up from Abby and Leah’s hugs. “Mommy has to go get dressed, you girls play nice”

Both girls pouted as she grabbed her t-shirt and walked back to her bedroom. “Hooo boy how the fuck am I gonna deal with this?” she muttered to herself as she changed into something a little warmer for Winter. She walked out to the kitchen, putting on a baggy hoodie as she sat down at the table. She placed the diamond in the centre of the table. The light in its depths had grown brighter.

Chelsea stared into it. In spite of what it had done to her wife and her best friend, it was still objectively beautiful to look at. She sighed and got up from the table. “Stop thinking about it. Just bring it to the Wizard tomorrow morning… I hope he can fix whatever’s happening” she said. She heard Leah and Abby giggling and smiled. They did look absolutely adorable like that though. She certainly wouldn’t want it to be permanent, but maybe she could convince them it would be a nice way to relax…

She groaned when she heard a knock on the door. She opened it and was stunned to see her Mother in Law Caroline standing there. “Morning Chelsea! Is Abby ready yet? She said her and Leah would be outside at 6:30. It’s not like her to be late” Caroline said. Chelsea wanted to just slam the door shut. Had Abby invited anyone else to this day out?!

On the bright side, she had someone who might be able to help her now! She certainly couldn’t leave the girls alone in the house. Maybe she could convince Caroline to help her look after them while she goes to get the Wizard tomorrow. “I uh… I don’t know really. You wanna come in?” she asked.

Caroline walked in and Chelsea shut the door. “Okay. This will make me sound crazy, but do you believe in magic?” she asked. Caroline frowned at her and shook her head no. “Because I have no other explanation for what you’re about to see” she said. Just then, Abby and Leah came running around the corner.

“What the?!” Caroline gasped, seeing the women dressed as babies. They didn’t even pay Caroline a second glance as they ran into Chelsea and Abby’s bedroom. “What did I just see?!” Caroline looked to Chelsea, making her way to the bedroom.

Leah and Abby ran out of the bedroom past her. “Girls! No running in the house!” Chelsea shouted. Both girls stopped and pouted. Chelsea turned back to Caroline. “Okay, long story short. Last night I found a black rock in the mines. Abby couldn’t take her eyes off it. When I woke up this morning, she was like this. Leah came by and stared into it too and ended up the same” she said, realising just how ridiculous it all sounded.

Caroline stared at her. Then Abby and Leah. Then back to Chelsea. No. She was staring at something behind Chelsea. She turned around. “No!” she yelled, doing her best to hide the diamond as it glowed. She hid it in her hoodie pocket, but when she turned around it seemed the damage had already been done.

Caroline was sucking her thumb. Her skirt had fused and become overalls like Leah’s. Although Chelsea couldn’t make out any diaper bulge. Her green hair had a ribbon in it and a pacifier grew out of her overalls. Caroline suddenly had one hand between her legs and started jumping from side to side. “Mommy! I gotta potty!” 

Acting purely on instinct, Chelsea grabbed Caroline’s hand and dragged her into her bedroom. A training potty big enough for an adult was now sitting beside the changing table. She quickly had Caroline’s overalls off, revealing a pair of training panties. As soon as Caroline sat down on her potty, a stream of pee started flowing. “Yay! I made it Mommy!”

Chelsea sighed in frustration. There went her plan of getting Caroline to take care of Abby and Leah. She grabbed a golden star sticker from a sheet she apparently had laying around. “You did sweetie! Such a big girl!” she praised, putting on her best smile for her newest baby as she put a star of a calendar marked as ‘Caroline’s potty chart’

She grabbed a baby wipe from the changing table and wiped Caroline down before pulling her training panties back up and putting her overalls back on. She now had THREE adult sized babies to take care of. “Mommy! I went poo poo!” Leah cried as she came running in. Chelsea gave Caroline’s butt a gentle pat.

“Go play with Abby while I change Leah sweetie” she said, giving Caroline a kiss on the forehead. Caroline ran off and she picked up Leah and brought her to the changing table. It was only then that she realised she’d kissed her Mother in Law. On the forehead sure, but a kiss was a kiss. Leah sobbed as Chelsea undid her overalls, revealing a very wet and very messy diaper.

She surprisingly wasn’t as disgusted by all the poop as she thought she’d be. She had to hold back a laugh when Leah moaned as she wiped her pussy. “You like that pumpkin?” she asked, smiling as Leah nodded. This was wrong. She knew it was wrong. This was her best friend. She was a married woman.

And yet, she wasn’t doing this for her own sexual gratification. It was for Leah, who was currently drooling all over her hand from the pleasure. She’d completely forgotten about crying and was far more interested in this new feeling. “Mommy! I feew thomethin’ cuuhhmin’” Leah moaned, her lisp getting worse as she spoke. Chelsea smiled and Leah giggled as the redhead came into the awaiting baby wipe.

“Such a good girl Leah. You made cummies for Mommy!” Chelsea praised her. Leah smiled dumbly. Chelsea finished cleaning her up and put her into a new diaper. This one had fun little animal prints all over it.

“Cummies?” Leah muttered, still smiling from the experience. Chelsea put her overalls back on and carried her back up to the TV. Abby and Caroline were both playing with Buster who loved the attention he was suddenly getting. She looked up at the time and gasped. It was 8AM! How and when did that time go by?!

She decided to ignore it for the minute. The girls wanted to go play outside in the snow she remembered. “You girls want to go play outside still?” she asked. Abby and Caroline immediately stopped playing with Buster.

“Yeah! Pway wif da snow Mommy!” Caroline shouted, with Abby nodding along with her. Still carrying Leah, Chelsea led the girls to the front door where there were now 4 thick Winter coats hanging along with 3 pairs thick, baggy pants and gloves. She made sure each of her girls was bundled up well, stretching the extra pants over their other clothes to make sure they stayed warm. 

“Alright, let’s go!” Chelsea said. She opened the door and Caroline and Abby sprinted out the door, with Leah nervously waddling behind. “What’s the matter Leah? You don’t want to play with your Sisters?” she asked, cringing at how she called Abby and Caroline Sisters.

Leah, with her thumb firmly planted in her mouth, shook her head. “I wanna make cummies again Mommy” she said. Chelsea chuckled to herself. She’d gotten her poor baby hooked on cummies. NOT HER BABY! Her best friend who has the mentality of a toddler!

She gave Leah a quick kiss on the cheek. “Don’t worry sweetie, Mommy promises you can make more cummies later. You can even show Abby and Carrie how to make cummies. Go have fun with your Sisters for now” she said. Leah giggled and ran off after her Sisters. Her Mommy had promised she could make cummies later. And a promise was a promise!

Chelsea sighed as she watched the adult women make snowballs and throw them at each other. It definitely wasn’t they day out of whatever Abby had planned for Leah, Caroline, and herself. But she couldn’t really bring herself to wish this hadn’t happened. The Wizard would be back in his tower tomorrow. And they’d all hopefully be back to normal then. But for now, she was going to enjoy having her babies around.

She felt the diamond in her pocket. She couldn’t help but wonder why she was different. 4 people the diamond had changed. Yet Chelsea herself hadn’t ended up in diapers like the others. She’d instead been made their Mommy. She shrugged. A question that would probably be answered tomorrow.

With the Feast of the Winter Star in 2 days, she at least hoped it would be fixed. Otherwise she’d have to explain to the whole town how she’d managed to mentally regress her wife, Mother in Law, and best friend. Chelsea was brought out of her thoughts when a snowball hit her. It was followed by the giggles of 3 happy babies.

Chelsea smirked at them. She’d happily show her little girls how quickly their Mommy could make and throw snowballs!