In the history of the world, many a thing was said while drinking that might of been better kept to one's self. confessions of affairs, tales of horrible deeds you need it. 
But on one chilly autumn night as Jace and his boyfriend Simon were enjoying some drinks (Blood for Simon, since he WAS a vampire, and warmed spiced rum for Jace) A soon to be ex shadow hunter's tongue had grown far too loose and he slurred out story after story, Simon putting up with it because he loved the dork. 

"Did I..Did I ever tell you about the time..I took a pasta bath?" Jace coo'ed, a big silly smirk on his face as he raised his glass to his face, draining it in one burning gulp.
"Oh, Maybe, Once of twice. and your still not having one in my house. I have trouble keeping the plumbing working as is with your buffalo poops." 
Jace giggled at that, his BM's happened every few days and were things of legend and horror, at least to those who had to try and unclog the toilet after him. Alec had in fact one time had told him in a fit of anger to go and poop in the field with the other buffalo and hence the term had stuck.
"Yer just jealous because I can take a BIG poop..and all that blood gives you the runs!" Jace said and blew a raspberry at Simon, then got up to make anther drink while Simon wiped his face clean from spittle with a rag while rolling his eyes.
"Yes Jace. That must be it. I'm jealous of your big poop's. It's not the fact plumbers have started to block our number." Simon said sarcastically, then tilted his head. "You sure you need anther one? you seem like you've had enough already." 
"Don't worry about me getting whiskey dick, I got a hard on with your name on it! Not literally but that's only because they were SUCH prunes at the tattoo parlor." Jace giggled then huffed, coming back over drink in hand.
"..The sad part is, Knowing you I don't know whether your joking or not." Simon snickered.
"Part of the charm that comes with dating me luv~" Jace giggled and popped down into Simon lap, sipping away. 
It wasn't long before it became clear that last drink had been one too many and Jace was clearly blacking out even as he giggled and coo'ed in Simon's lap. 
"Wanna know a sssssssecrrrrrret?" Jace asked, giggling childishly and finishing off the drink, going to set the glass down but it missed the side table and fell to the floor. "Some bloody fool moved the table!" 
"..*sigh* yes love, that's what happened. and whats your secret?" Simon asked, knowing he'd be the one cleaning up the glass and wishing Jace would switch to drinking from a sippy cup or something.  
"Hmmm OK I'll tell you. but you can't tell Simon alright?" Jace said, eyes unfocused and then holding up a hand and extending a pinky. "You'll hafa pinky promise!" he added childishly.
"..Your secret is safe with me I promise I will NOT tell Simon." Simon said, and technically it would be the truth. Linking his pinky with Jace's and getting a toothy grin from the blond, he pulled his hand back and waited.
"I totally wanna be over the lap, bare bottom spanked till my butt's redder then a tomato, scolded and treated like a little kid who was being a brat!" Jace giggled madly and blushed, getting a slight tent in his pants. 
"Oh my, how scandalous! But nothing too over the top." Simon said, snickering a little. He'd had a feeling Jace was into being spanked for awhile now what with crying out to be spanked while Simon fucked him. 
"Ohhh but it gets better!" Jace said and smirked, then looked thoughtful, chewing his lip for a second. " or worse I suppose depending on how you look at it." 
"oh do go on, I'm all ears." Simon said. 
"A operation could fix that." Jace said and then hooted and laughed like it was the best joke ever. 
"Very clever. what else is there?" Simon urged, wanting to know all of Jace's silly little kink's while he had the boy in the perfect mindset to spill the beans. 
"Oh yeah! welll after the spanking, I wanna be stood in the corner of the room, pants around my ankles and threaten with a bar of soap in my mouth if I don't stop my blubbering. totally all little kid style." Jace said, the blush getting worse and his tight jeans making him squirm as he dick was trying to full on tent. 
"Anything else? you'll feel better getting it off your chest." Simon said, a hand going down and rubbing on the front of Jace's pants, helping to cox the truth out.
"O-Oh! Mmmm..I..I..Wanna be given a bigggg painful enema then.. soapy water and castor oil..then taped up in princess diapers cuz..cuz.." Jace was having trouble finishing, his breath coming in gasps and moans now as he was getting close.
"Because what?" Simon asked, and kissed Jace's neck, right on the sweet spot.
"B-Because I wanna be a helpless sissy baby set up to fail!" Jace cried out even as his load soaked the front of his pants, one of his biggest cum shots in recent memory that didn't involve flattening his prostate with Simon's cock.
with the load spent, Jace mewed and snuggled in tight to Simon, his eyelids droopy and his thumb coming up to his mouth. Before it went in however Jace asked in a voice that was a mix of drunk and sleepy.
"You won't tell Simon right?" as he nuzzled in. 
"I already pinky swore." Simon said, and Kissed jace's forehead. as the blond started to snore Simon softly added. "Since you already told me silly gurl. I can SO work with this." 
Carrying Jace like well, a baby, Simon got him changed into PJ's and tucked into bed, then went to make a few phone calls and so some web browsing. 
Nurseries, especially adult ones for little sissies didn't build themselves after all.

As luck would have it, the following week after Jace's drunken confession the hunter ended up going on a extended case out of town and se wasn't around to see the former storage room being turned into a sissy babies dream nursery.  The walls were painted a pastel pink and little clouds and rainbows and Unicorns were all over. the former had cement floor was covered with a nice plush purple rug that would keep the impending baby nice and warm when waddling around and playing.
As for furniture the room had a metal crib, slightly too small for Jace so the sissy baby would be forced to sleep with his knee's up or face down ass up. the metal itself was custom worked with hidden runes that would keep Jace from being able to break out of the crib on his own and the bars were high enough he wouldn't be climbing out on his own.
the mattress was made extra soft so getting firm footing would be next to impossible and under the hot pink cotton sheet was the slick plastic of a waterproof sheet. Add in some pillows with my little pony covers and a Barbie princess blanket and it was almost perfect. What would make it perfect was the mobile that was decorated with pairs of Jace's skid marked briefs and boxers..so the widdle princess would be able to look up and see what he'd given up.
Moving on to the maybe most important part of any nursery, was of course the changing table. made from harden oak wood and painted white with little rainbows all over the frame, it had a light purple cushion where baby Jace would be plopping 'her' sissy butt during diaper changes. 
It had drawers that would be locked to keep widdle princess Jace from getting into trouble, and some were stuffed full of princess diapers, others My little pony, some had pink flannel cloth diapers and anther had diaper pins and frilly plastic panties. 
aside from storing the diapers, it also held diaper cream cream, baby powder,wipes and a assortment of pacifiers, some with very naughty shaped nipples. The last drawer stored the most evil thing of all, a selection of pink chastity cages ranging from the largest which would be a tight fit, and going down to button dick, Simon had plans for making his baby gurl's cock into a cocklet.
From there there was a toy chest, which would also be locked and need a key that only 'daddy' would have, but it had stuffed teddies and barbies and ponies and all the things that would make a little girl squeal with joy..and have Jace bored out of his skull but Simon again had plans for his baby gurl to play with his toys for at least 3 hours a day and be able to tell Simon all about the adventures they'd had.
Last but not least was two remaining items, there wasn't really room for dressers in the nursery and the idea of Jace having to waddle though the house to daddies room in just his diapers for a outfit was highly appealing to Simon anyways. 
The first was a mirror up by the wall opposite of the crib so baby Jace would be able to see himself in all his baby glory or 'admire' his poopie diapers. the glass was tempered and treated again with runes so it was unbreakable for the most part, unless you treated it with dragon's breath first. Naturally Simon didn't see that happening.
The last item was also a thing no nursery should be without, a diaper pail. this one was the size of a large trash can like you'd see in a restaurant which meant it wouldn't need to be changed all that often and had been pulled off the market because it failed to keep in the poopie smells. The thought of Jace trapped in the nursery and due to it not having a window, NO way for the stink to escape made Simon chuckle, it was the perfect revenge for all the dutch ovens he'd been on the receiving end of from Jace.
there was a over head light and a plug in for night lights so the widdle baby wouldn't get scared, and all and all the nursery had set Simon back 10 grand. 
"The perfect nursery for a big sissy baby brat: 10 grand. Making your man you baby girl? Priceless." Simon snickered and turned off the light, leaving the room and locking it behind him.
Jace didn't usually bother with the storage room but there was no sense in risking anything. 
"Now all I need to do is wait for him to come back, and give me a excuse." Simon mused, and went upstairs to relax. 

As luck would have it, Jace set himself up for the fun without even ever having a chance to know anything was up. 
Having called Simon and telling him he was on his way back at 1pm, and should be there at 2:30ish, it was 8Pm before Jace came waltzing in the door, smelling of smoke and beer. 
Thankfully he wasn't drunk, it took more then a few beers to put him under the table but he was rowdy as he strolled in.
"Mothers, lock up your sons! I'm back baby!" He hooted, dropping his bags on the floor and turning to Simon who did his best to hold a disapproving look and not smirk as Jace held his arms open. "Give me some sugar baby!" 
"What happened to 2:30?" Simon asked, keeping his tone strict, and having to nip on his tongue to keep from grinning he was so excited for what was about to happen.
"Oh uh,.. traffic. Lots of it! Like it was crazzzzzy!" Jace said, dropping his arms and looking sheepish.
"Mmmhmm..Why do I smell tobacco smoke and beer on you then..and Before you go to argue..Vampire remember?" Simon said, holding up a hand as the protest was on Jace's lips.
"...Smokey the bear asked us if we wanted to party and I didn't wanna be lame?" Jace tried weakly.
"I think I've heard enough between the lies and being out past curfew. Somebody just earned themselves a trip over daddies lap!" Simon said, smirking for the first time.
Jace's cheeks turned bright red, his jaw dropping, clearly he didn't believe what he had just heard. His pants showed it had registered however as a hard on was growing. 
"I..what?" Jace asked.
"I didn't stutter." Simon said, taking a seat on a hard oak chair and then patting his lap. "get over here, drop your pants and undies, and get over my lap like the naughty little child you are, and do it quickly before I change my mind and get the hair brush." 
Jace was weak in the knees but trying to hide a grin (Trying and failing) as he walked over. somehow Simon must of figured out he loved a good spanking and if the vampire really though it was gonna be punishment, he was in for a shock. 
the one thing Jace didn't keep in mind as he dropped his pants and then his scooby doo briefs was he'd only been spanked by humans before, his tender cheeks had never been fully assaulted by a vampire.

Simon smirked at how clearly aroused Jace was by all of this, and wondered for a second if he should hold back and let the soon to be baby gurl enjoy this first spanking and leave it at that for now. After all, this was the love of his life over his lap and surly Jace desr-
"Sooo you gonna spank me or just keep looking at my perfect ass?" Jace asked, wiggling his hips.
'Well that made that choice easy.' Simon thought dryly and brought his hand down with about 1/4 of his total power, he'd build up slowly just so Jace would be further caught even more off guard.
"-Yawn, you starting yet?" Jace asked, patting a hand over his mouth and smirking.
WHAP! this time with half power and Jace jumped a little, but gave a nervous little smile.
"...That all you got?" He asked with a impish smile.
"Nope~" Simon said and WHAP anther swat, 3/4's and Jace yelped out a little. "Oh I'm sorry, was that too much for the big bad hunter?" 
Jace whimpered and shook his head, his cock was still hard as he looked back. his common sense told him to say yes, but it was the ego driving his mouth as he went. 
"puh-lease, three year girls hit harder then you!" 
"Really? Are you in the habit of having 3 year olds spank you often?" Simon asked with a chuckle. before Jace could respond he unleashed with the full Monty, swatting Jace's backside over and over as the tears flowed out and Jace's legs where kicking, the big tough hunter was bawling like a baby and begging for Simon to stop.
"Oh I'm sorry, you're asking WHO to stop?" Simon asked, pausing and rubbing the now bright red butt of his lover, who's hard-on despite all of the pain had NOT gone away. 
"I..I.." Jace sobbed and hiccuped. "L-Little help?" he asked, actually confused as what the right answer was.
"heh, alright, I'll help you out this ONE time..next time you're over my lap though.." Simon said and winked, lightly slapping the cheeks and getting a dribble of pee on the floor. "What did I call myself when i was telling you to come over here?"
Jace mewed, his bladder suddenly more full then he could ever recall it being as his thought as hard as he could then..
"Daddy! Please daddy! no more!" Jace begged, fully meaning it as he wasn't sure his little tushie could handle anymore!
"Hmmm I suppose that takes care of the FIRST part of your punishment.." Simon said and let Jace off his lap, standing up and giving him a big hug and kissing his cheek.
"F-First part?" Jace asked, having a bad feeling about this.
"Yup~ after all, I still need to put you on time out AND wash out your mouth for telling fibs don't I?" Simon asked and then gently lead Jace toward the kitchen sink.
'How the fuck does he know all of my buttons!?!' Jace asked himself, then got a flash of him while drunk awhile back and a rumble in his tummy showed his nerves acting up, as did a loud toot coming blasting out that sounded like a fog horn.
"Good thing we're not by the harbor." Simon teased then held a nose. "Sheesh, whatever you ate kiddo, no more for you." 
"I..I..Simon-" a glare from the vampire. "..Daddy..did I um..say some silly thing's the other night while all drunk?" Jace asked, gulping loudly and his heart beating fast in his chest as Simon opening a new bar of soap and works on getting it EXTRA sudsy.
"You might of mentioned some silly desires..though don't worry, just like you made me swear..I didn't tell Simon." Simon said and winked as Jace trembled.
"T-Those were all just..Um..silly things and I don't really want any of them, so we should just sto-" Jace was saying, only to be cut off as the bar of soap was popped into his mouth, making his eyes screw up at the taste and his muffled complaints form lots and lots of bubbles.
"I think a certain somebody love this no matter what he says, and is going to get the FULL experience that made him cream himself in my lap. and besides..the words out of your mouth might say ONE thing." Simon said, then grabbed Jace's hard cock, stoking it softly, keeping the poor soon to be diaper sissy on edge. "But THIS tells me everything I need to know baby gurl." 
As Simon said it, Jace couldn't help but cry out, around the soap as he shot out big load all over the kitchen floor, legs quivering like jelly as he finished.
"Well I think that proves why you need diapers little lady." Simon said taking his hand away as Jace closed his eyes in embarrassment, and his cock went from soft back to hard. "But that was your last cum shot for the night unless you wanna spend more then tonight in diapers.. for now, march that red butt over to the corner princess farty pants." 
Moving on rubbery legs and gasping and groaning, even as the soap flooded his mouth and he made more bubbles, Jace made his way into the corner, spotting a circle that he hadn't seen on his way in just at perfect level for his nose, and a scribbled message on both walls with arrows pointing to the circle.
"Bad gurl's noses go here!"
'..I both hate and love my boyfriend right now.' Jace mewed, his cock starting to come back to life as he was a good little sissy. 
Or a bad one depending on your point of view.

While Jace 'suffered' so to speak, Simon was whistling a little tune about whistling while you work as he put together a enema that he was sure would of violated several treatment of POW's treaties.
'If he manages to go more then 10 minutes without this coming spewing out of his ass I'm going to be both impressed and annoyed, but I'll know to make it stronger next time.' Simon thought, using a mixture of castor oil and hot water as well as generous amount of herbs and spices that were normally used for helping a Minotaur clear a blocked colon. 
he half considered toning down his treatment, till he was sure he'd want this full on, but then the idea of Jace sobbing in cartoonishly filled huggies and sucking on a paci on his knees and watching Simon and someone else making out made him tent out his pants.
"Yeah no, this is gonna happen." he said softly to himself, finishing up with loading up the 2 litlre enema bag and shaking it up. "Oh Jacccce~ Daddies finished making you a special treattttt~" he called out loud.

Jace didn't dare turn around but hearing the wheels on the carpet he knew that Simon was coming over with a enema on a pole, likely up high to ensure a rapid filling. 
it was likely a good thing he didn't turn around though because if he had seen the size of what was going to go in his guts and the size of the nozzle destined for his cute little hole, he might of wet himself and/or creamed again.
"Now I know I said you just needed a time out, but with how ROTTEN your gas is and all that beer in your tummy tum, Daddy thinks somebody needs a nice big enema to clear him out. I'm sure my little pervert gurl will enjoy this, and even if you don't..well daddy will and isn't that what's important? besides you know what they say." Simon said, pausing to spit on the huge nozzle as the only form of lube and then shoving it HARD into Jace's well used but still semi tight hole thanks to his healing magic. "We only hurt the ones we love~"
Jace screamed, the bar of soap only coming partly out as he did so due to the face he so close to the wall and tears were running down his cheeks anew, even as his cock twitched and throbbed and the little baby gurl came hands free, coating the wall.
"tch, Didn't I warn you about cumming again? Somebody just earned a week in diapers!" Simon scolded and Jace just mewed and whimpered, his belly rapidly bloating as the hot mixture filled him.
'Mental note..If I survive this..never get drunk around Simon again..' Jace thought as his eyes rolled back in his head. 

By the time the enema was all in Jace, he looked like he was 9 months pregnant and ready to pop at any moment. which given how full his bowels were wasn't too far from how he actually felt. 
he was whimpering and sobbing, sweat trickling down and the bar of soap was on the floor, having gotten too much from his suckling to safely stay in his mouth and ergo had been replaced with a paci that had a cock shaped nipple and strapped around his head. 
to keep any temptation away from trying to get free out of Jace's mind, his hands had been slid into thick baby mitts that would of made picking up anything next to impossible and they were secured to each other but a short length of chain at his front, meaning no way to try and yank the plug out anyways. 
A threat of doubling his cummie punishment this time (meaning three weeks in diapers) kept the sissy from trying to play with himself since despite clearly suffering from painful cramps and squirming about, he was still rock hard. 
"Hmm guess that's all of it, kinda shocked you were able to take it all! Somebody had a thirsty butt huh?" Simon coo'ed and after checking the bag he kissed Jace's damp cheek. He then added with a laugh."You know, if you want, I could always get anther bag ready for you if you want more." 
Jace let out a series of frightened groaned and whines, shaking his head no and Simon patted his head.
"Kidding! Time for your next punishment anyways." He said, 
He had moved over to the fridge as the ordeal was coming to a end and in a quick motion pulled the nozzle out of Jace's rear while jamming a COLD cock shaped play of some kind into Jace's rear, the sissy could feel it squishing sorta even as he shivered. 
"Clench down around that and keep it in little lady. If that enema comes out while I'm walking you to your nursery you're going to be in a world of hurt." Simon said and then turned Jace around, smirking at the look of confusion on the sissies face. "What? you didn't think -I- wanted to spend the night smelling your shitty diaper did you?"
Jace tried to reply but with his mouth stuffed with fake cock, nothing really came though. Still Simon stood there and nodded his head, as if he understood. 
"I see, so you agree that your the only one who should have to put up with your shit swelled diapers. well that's very big of you Jace though it's not like you had a choice. Now come on, that Gel plug isn't going to last long." Simon said and tugged on the chain, leading the way. 

Keeping the plug in his butt and walking turned out to be harder then Jace could of pictured since with his belly sloshing and cramping so bad, everything wanted to come out and it wanted out YESTERDAY!
Still he was handling it and kept it in like a good little gurl even if he felt like maybe Simon was getting a little TOO into this, but even he had to admit he almost lost it when he saw the nursery. 
Eye's wide and looking around he was struck by just how much it was prefect for a naughty little sissy baby like him but then also filled with horror as there was no way it had been cheap.
and if Simon had spent a pretty penny on it Jace could count on spending a lot of time in the nursery. 
"I see you approve of your new room. Glad you like it since you're gonna be spending SO much time here when I'm going out on dates with men who are men." Simon chuckled tugging Jace over to the changing table. "Not punishment seeking little sissy baby losers." 
"Mmmmfph!?!" Jace cried out around his paci gag. 
being cuckolded was NOT part of his little wank fantasy!
"What? I'm not allowed to have a man in my live who's not a diaper filling wuss?" Simon said, smiling big time as he got the mittens hooked up to the cuffs on the table. "You'll be in here cheating on me and making love to your diapers and stuffies, at  least until I put your cock in chastity so why shouldn't I get to cheat on you. just consider it a open relationship." 
Jace was shaking his head no now, and his cock was actually semi going soft, at least until Simon took out the thick pink diaper and swung it back and forth, catching Jace's eyes and making him follow it back and forth with his head as his cock came back to life. 
"Tell you what, since I'm SUCH a loving and understanding daddy.. I'll let you go without the cage for tonight so you can adjust. if I was you, I'd get ALL my baby milk milk out before 1 pm." Simon said, unfolding the diaper cutting slits in the front and back of it before getting it under him. 
"Mmhhmm?" Jace tried to asked, wondering why 1.
"Oh I forgot to mention.. I'm have a strict rule about not changing any shitty diapers before noon. and then I'll be busy cooking and eating." Simon said cheerfully. "Hope you like diaper rash!" 
Taping the cut diaper around jace's nether regions and avoiding any hint of baby powder, Simon repeated the performance with 3 more slit diaper, and then a final un-slit one. 
the effect was comical, the diaper looked almost unreal puffed out around Jace's waist and the blond doubted that he would be able to even CRAWL let alone walk as he was unchained from the changing table and carried over to the crib, hooked up nice and snug on his back as he whined and whimpered, the gel plug having almost melted and giving Simon pleading eyes to at least put him face down. 
"now now, none of that, I'm immune to the puppy dog look. Have a nice night shitting yourself and suffering from the smell, and I'm positive that you'll be able to cream yourself even if all you can do is rock your hips up.since you like pain and your leg's are stuck like that I'm sure the cramping alone will get you off. If you happen to need daddy for anything..well.." And Simon smiled, heading for the door. "Tough luck. have a nice long night loser..and remember.. Daddy loves you so much he's making your stupid loser dreams come true. anything to say before daddy goes?"
Jace cried and mumbled around the gag, trying to tell Simon he was sorry, that he would be a good boy, no more diapers or anything, trying to promise him anything but the cries cut short as the last of the plug melted away and in his cramped position in the crib, there was nothing Jace could do to hold back.
with a massively loud even though the diapers SHOULD of muffled the noise fart, the seat of the diapers were filled with hot mushy waste that rapidly filled up the first diaper and was working on the second one as Simon winkled his nose. 
"Well said. Night night." He said, holding his nose and then shutting the door, leaving Jace all alone as more sludge came out of his rear and the stink was already making his eyes water and nose burn. 
this had long night written all over it and if Simon was for real about the cucking, maybe even long life. 
Sobbing and squirming, Jace also had the first of many messy diaper orgasms as he realized just under the roar of his wet gross farts..he could hear a baby's lullaby being played. 

the end