Dusk was setting as Jean made his way over to his boyfriends house, admiring the subtle changes in the sky as darkness came over and glad that they had managed to go awhile without a attack from a titan. 
He was looking forward to a romantic night with Marco, the love of his life, and was already picturing a candlelight dinner for two, maybe some dancing since Marco had a wine up record player. 
Just the thought of being in the stronger man's arms had a blush going as he knocked gently on his lovers door.

Marco was beside himself with glee and couldn't wait for Jean to come over. he knew his boyfriend was expecting a evening of loving adult fun but Marco, a daddy dom who had to go without his little for long periods of time, had other plans.
he'd been saving up on water rations and the like for the past three months and ergo had enough spare water and soap to justify washing out diapers, which mean Jean's usual 'I'd wear but it's a waste of water rations to clean the diapers' argument would be rendered moot.
Hearing a knock on the door and wearing his semi daddy apron (So he'd be protected against spit up, drool and the like and having pockets for a rattle and pacifiers) moved to answer the door. 

As the door opened up Jean groaned, if Marco was wearing the apron it meant any chance of loving bliss was gonna be a miss and he wanted him in thick cloth diapers and making a moron of himself. 
of course a small part of him (Very small since it wasn't even making a tent) maybe kinda sorta liked the baby treatment and the teasing but he'd be damned if he'd ever let Marco know that!
"Really? your letter said a night I'd never forget." Jean huffed, narrowing his eyes. 
"And I promise, you won't~ Now git in here!" Marco said and tugged the smaller boy in with ease, kissing his lip sand patting Jean's butt. 
diapered or not bum pats always made Jean weak in the knees and he spread his legs, whining into Marco's mouth that he was cheating, though he doubted Marco would be able to understand him since the bigger boys tongue was claiming Jean's mouth for itself. 

Marco of course knew full well what Jean was trying to say, and just kept patting the boy's butt. he was sure if he could only get Jean to mess himself and get him across his lap, he's have the huffy baby creaming himself in seconds. 
Thus far in the many times they had played before, Jean had only gone as far as wetting himself but Marco had plans for that to change tonight.
Between what was in the ba-ba he had ready for him and the food he'd prepped, there was no way little Jean wasn't making daddy all sorts of presents tonight. 
Pulling away from Jean, Marco smirked as Jean's eyes were closed and he was still moving his mouth as if they were still kissing. After about 7 seconds Jean seemed to realize it had stopped and so opened his eyes and closed his mouth, blushing and glaring. 
"Why'd you stop!?" he whined and huffed, crossing his arms and well, looking like a big huffy toddler.
"Because Daddy needs to get his little man in his diapies before he makes a puddle.. tinkle or otherwise." Marco said with a wink then lightly tapped the front of jean's pants.
Jean was a quick shot who made up for it by being able to fire off multiple times a night, and having been so primed and not having wanked all day the effect was almost instant. 
jean's mouth formed a perfect O and he hunched over, his hands trying to shoot down and cover his crotch but Marco held them away and watched as the front of the smaller boy's tan pants started to darken, and then watery cum shot out as Jean gasped and cried out.
"N-Nooo Ah I CUMMING!" He cried out, jerking his hips and mewing.
"See? You just made a love puddle. you need your diapies." Marco coo'ed and let go of Jean's hands as the smaller boy sunk to his feet, taking a few seconds to recover.
"..Your a asshole you know that?" Jean huffed, but the fight was out of him.

Letting Marco lead him to the bedroom Jean was huffy and grumpy, he hadn't been able to fully enjoy his cummie and wanted anther one but knew daddy was gonna make him EARN the next one. 
'stupid freaking perv, priming me up like that! he could of at least kept patting my butt!' Jean mentally huffed as he let Marco strip him. 
it was second nature almost so he was mostly in his own head fuming and as such was caught off guard as a paci was popped between his lips, sucking on it out of habit before it even fully registered. Once it did though he glared at Marco who was just giving that fucking 'I'm such a awesome daddy' smile that made him wanna slug him one..or jump into his arms. maybe both.
"I could see somebody was getting all grumpy Gus and i know how you like to suck on things." Marco said, making Jean blush brightly.
Despite how long they'd been together, the only thing that had entered Jean's backside was fingers or a enema,. Their sex life was all about teasing handies or fingerings for jean, and Jean on his knees and sucking Marco. 
Too embarrassed to argue Jean just suckled away on the fat rubber nipple and looked away as Marco had him flat on his back, naked. 
"Awww somebody was a good boy and kept himself shaved! Such a very good boy I have! yes I do!" Marco coo'ed and tickled Jean's tummy making Jean giggle and squirm despite himself. 
"also you don't need to worry sweetie, Daddy saved up LOTS of water so you can go  all out and use your diapie to it's fullest." Marco chuckled, making Jean's eyes go wide. 
Jean shook his head no like crazy, and went on a rant about how he only liked to wear, he only wet for Marco's sake and he wasn't going to go poopie in a diaper even if Marco gave the best bum pats ever, all while Marco just looked at him chuckling and amused. 
"Finished?" Marco asked, then tapped his own mouth. Jean blinked and looked down, realizing he'd kept the paci in for his whole rant and whined. "I'm sure whatever you said was VERY compelling and deep, but I don't speak gibberish. Now bum up." 
whimpering and whining, Jean did as he was told.

Marco was VERY amused. despite jean insisting he wasn't a little guy and was only doing it for Marco's sake, it was clear he loved the attention and no one who could baby out as good as Jean did wasn't at least partially a little.
Sliding the thick terry cloth under his boyfriends butt, Marco took out a container of talcum powder and sprinkled it on the little guys cute little wiener and balls (So small and compact it almost just looked like on normal sized one) then tugged the cloth up and fished out two large diapers pins.
with a fluid motion that showed he had not only done this before with Jean, but practiced it many many times, Marco had one pin in his mouth and the other one opened and serving the left side of the diaper, with the right side following suite soon after. 
Helping Jean up to his feet Marco waited a second. he was 99.99 percent sure the diaper was on snug enough, but better for it to fall off while Jean was standing in front of him then while the little guy was trying to walk.
Jean himself little down, and wiggled his hips (his version of a stress test) and then grinning behind his paci gave Marco a thumbs up that almost made the daddy melt.
"Do you wanna be a big boy and waddle behind daddy out to the table for some din-din, or you need daddy to carry you?" Marco asked.

jean thought about , a chin going to his chin and stroking it as he looked thoughtful (well, as thoughtful as one cold in a massive terrycloth diaper and a paci in their mouth. 
on one hand he wanted to be able to keep some pride as a big boy and show he didn't need to be carried, so walking was good.
on the OTHER hand however Marco had diapered him and wanted him to be his helpless little boy, so he should have to suffer and carry him. 
the bratty impulses won and Jean giggled and held out his arms for Marco to pick him up. 
"Why do I even bother to ask, you always pick carrying." Marco said, doing a stage sigh and then scooping Jean up in his arms bridal style. "I suppose this is my burden to bare if I wanna have a cute widdle diaper boy." 
jean smirked and giggled and Marco carried the love of his life out to the dinning room table, sitting him down in a chair. 
sadly he hadn't of been able to get a adult high chair as of yet though it was next on his list of things to either buy or make himself. 
"So, whats for din din?" Jean asked,having taken his paci out and set it on the table and was  kicking his legs under the table, staying semi still as Marco tied a dirty white dish towel around his neck, a semi baby bib. 
"well for me, I'm having some fried fish and veggies. YOU on the other hand.." and Marco turned, getting a large plate that had been covered up with a stainless steel cover and lifted it even as Jean groaned. 
there was the fish alright, and Marco's veggies..and there was also 4 jars of prune flavored baby food. 
"Really?! That's what your giving the man who's willing to humor you?" Jean grumbled. "you could of at least gotten me some fish and just cut it up for me!"
"..I honestly didn't think of that.," Marco admitting and rubbed the back of his head sheepishly. "Well I suppose now i know for next time!" he said brightly.
"IF there's a next time." Jean huffed, sulking big time now and crossing his arms over his chest. "Could at least got some baby food that doesn't taste like ASS." 
"..heh so you open to baby food if I get apple and a banana's? Noted~" Marco said and snickered.
Jean instantly switched from huffing and sulking to blushing and shaking his head no. 
"N-no! that's n-not what I meant! don't twist my words around!"
"Don't worry baby boy, Daddy will get you lots of nummy baby food for next time." Marco coo'ed and patted jean's head, then tugged up a chair and sat down, getting a spoon and one of the jars and opening it. "Now open up for the num nums!" 

Jean was mentally huffing like crazy and for a split second toyed with keeping his mouth shut, or trying to grab the fish and eat it. Of course he knew neither of those options would really end well for him as Marco was a daddy dom who believed in spanking brats. 
That left the choice of playing along or going hungry and so he opened his mouth even as he closed his eyes. 
he knew from experience just how AWFUL this stuff tasted and wasn't shocked that the flavor hadn't improved as the mush made contact with his tongue. 
Scrunching up his face and shaking his head, he forced himself to swallow as he knew Marco who just scoop any he didn't off his chin and back into his mouth. 
he was vaguely aware of Marco praising him but when it came to baby food, he tried his best to just distance himself and think of something else. 
the awful taste never got any better but Jean found himself able to choke it down easier as time went on and he was vaguely away of Marco smearing dome on his face and scolding him for being such a sloppy baby. 
He came back more or less as he heard what sounded like the fourth scraping the inside of a jar and slowly opened one eye to check. 
"anddd that's it. you're all fed." Marco said.
Jean grinned and went to say thank god, but a loud foul tasting belch came out instead with a little spit up and he turned red all over as he sat there mortified. 

Marco mentally signed, he hated it when Jean went on auto pilot but considering everything he was getting tonight, he knew better then to make this his hill to die on. 
instead he kept up the baby talk and got minimal responses from Jean (though he loved the icky faces)  and just powered though it, knowing it would give the little guy gas. 
And boy, had he called it!
Laughing and wiping jean's chin clean of the spit up with one hand, Marco waved a hand in front of his face with the other. 
"whew! and daddy though he could burp! I should enter you in the next belching contest at the bar!" He joked. 
"S-Shut up!" Jean whined and mewed, squirming in his seat big time. 
"Awww it's ok buddy, it's just a little gas. if Daddy doesn't mind when you fart on him, a little burp is ok." Marco coo'ed and kissed jean's forehead. 
"..I want ALL the cuddles after you eat." Jean huffed.
"You drive a hard Bargain but ok.Here, I'll go and you you set up so you can play while daddy eats." Marco said.
without waiting for a reply from Jean (who listens to a baby anyways?) Marco had him picked up and plopped on a blanket in his living room, disappearing off for a few seconds and coming back with some old toys he'd brought at a flea market. 
"Y-You got these for me?" Jean asked, going semi silently and Marco asked a eyebrow, trying to read him. 
"Well yeah. you're my little guy and shouldn't have to pretend a block or firewood is a toy." Marco said. when Jean didn't reply he went on. "I couldn't afford brand new toys but i-"
he was cut off as Jean hugged him tight.
"they're perfect! I love them! thank you daddy!" Jean gushed and coo'ed. 
'..mental note, toys are the way to a big babies heart.' Marco thought, but hugged back. 
"Your welcome buddy."

while Marco went back to go eat Jean had his paci back in his mouth and a bottle of milk on the table nearby if he got thirsty, though he was too busy playing with the wooden soldiers and the building blocks and the like daddy had gotten him, in little guy heaven. 
'I have the best daddy in the world!' Jean thought, all of his earlier protests over hating this mostly gone. 'I wonder if he'd let me take these home with me?!'
The answer was likely to be a negative since Jean had a somewhat bad habit of losing things but there wasn't any harm in asking. 
on his knee's and working away at making a fortress for half of the soldiers to defend while the other half could attack, Jean noticed his tummy was making lots of gurgling noises and feeling kinda funny but put it out of his mind as he kept working on the fortress, pausing to look over at Marco every so often for his approval.
"Your doing great buddy. Daddy's gonna have to get you more blocks." he called over, between mouthful's of food and sipping on some red wine.
grinning like a fool Jean took a small break as he finished the fortress, plopping back on his pampered tush and as daddy took a sip of wine he pulled out his paci and sucked on his milk, draining half the bottle in one go.
'huh, must of been more thirsty then I thought.' jean thought and then shrugged, getting back on his knee's and getting ready for the battle to start.
he left his paci out this time though so Marco could hear him talk as the different armies. 

'You know, for someone who claims he's not a little guy..' Marco mused, but kept that thought to himself.
the LAST thing he wanted was to jolt Jean out of his baby mindset after all. 
The battle such as it was, apparently was being waged over a teddy bear and both sides swore to fight to the bitter end for Mr.cuddles.  Or at least till they had enough of getting really big boo boo's as apparently they were firing corks at each other.
'I'll give him credit, no lack of imagination there.' Marco thought as he finished up his meal and placed the dishes in the sink. 
Coming over and sitting next to Jean he gave the big baby a warm smile. 
"So, who's winning?" Marco asked. 
"oh strait up tie so far daddy. though if it keeps up like this the Alliance to hug stuffies will win out since they have the fort. If the union to hug stuffies wants the W, they'll have to pull out something desperate." Jean said as if it was matter of fact, and Marco was silly for even having to ask.
"I see I see." Marco said and got a yelp out of Jean as he poked a finger in the leg hole of the diapers, checking for dampness.
"Daddy! Just ask! I'd of told you if I wet!" Jean huffed, blushing and pouting. 
"would you now? So, did you wet your diapie?" Marco asked.
"Nope! bone dry still!" Jean said proudly.
"heh, you SURE about that buddy?" 
Jean paused, and then reached down and patted the front of the thick cloth and gasped. 
"H-Holy crud! I d-didn't even.." he mewed in a small voice.
"aww, it's ok. just explains why you were so thirsty!" Marco coo'ed and as Jean started to fret and whine, he got the big baby on his back, then said. "I know what will make you feel better." 
"what?" Jean whined, huffing. 
"Belly farts!" Marco chuckled and before Jean could stop him Marco bent down and placed his mouth on the exposed belly and blew air, making a LOUD fart like noise even as Jean giggled and went 'daddy nooo!'
Four belly fart's latter though Marco was cut short as he went for number five as two back to back real farts came out of Jean's backside. 
"heh, somebody going all gassy?" Marco teased.
"NO! Those were uh..echo's! yeah!"
Marco looked around his Apartment. it wasn't cramped by any means but it wasn't big enough for a echo effect either. 
"Echo's huh?" He asked, raising a eyebrow and smirking.
"Oh yeah, totally. I told you, I'm not gonna." And a loud fart escaped again, sounding wetter. "Mess my." And a series of smaller farts coming out rapid fire. "Diapers." Jean finished and a final gut churning 13 second fart blasted out, ending with Jean gasping and clutching to Marco as the back of his diaper started to fill up.
"whatever you say. but I'll wait for you to finish 'not pooping your diapers' before I change you." Marco chuckled.
"..Okay daddy." was all the red faced little could say before grunting and pushing, his diaper ballooning out rapidly.
As the smell filled the Apartment Marco made a mental note to open the windows ahead of time for the next time, but just kept hugging his little stinker.
'i have to be the luckiest daddy in the world.' He thought and smiled.

The end