When a deal backfires

Inuyasha was NOT a happy camper as him and Kagome waited in the room they had rented for the night. Of course ever since a curse had been laid on him that left him with ZERO bladder and bowel control he had rarely been a happy camper anyways so by this point she was used to him sulking like a toddler who didn't get his dessert.
"I can't believe you went and worked this out behind my back." The pampered puppy growled for about the millionth time (OK, it was more like 50th but he was getting annoying!) 
"Inuyasha, at the risk of sounding like a broken record.. We both know that we need jewel shards right? that's the only way to give you back a degree of control? and we can't start chipping up how much of the jewel we've put together JUST for that." She Said, using the same tone of voice one would use with a slow child.
"Well..Yeah. It would be nice to stop crapping myself..but..can't we just go beat up some random monster an-" He started, rising off of the soft bed with a bit of a struggle.
Between the softness of the mattress and the thick bulky plastic diapers Kagome brought from the future (Along with a red onesie the half demon was currently wearing) It took more effort then he wanted to admit and he wasn't fully on his feet when she rolled her eyes and shoved him back onto the bed.
"Look pup." She started, smirking and knowing how much he HATED his new nick name. "Face the facts, there's no way you can kick a jewel charged demons ass by yourself in this state. and if the others help they'll insist the shards join the others. you already know this. SO, Who do we know who might be willing to trade his shard, both of them that we need for this, in return for one night of fun." she asked, cupping Inuyasha's chin as he sat back up blushing. "Well? Come on, so me you're still a clever boy~"
Inuyasha huffed and whined, he HATED it when she treated him like some dumb toddler, well mostly. but the part of him that liked it was being ignored. 
"Koga." He huffed and crossed his arms. "Still don't think you whoring yourself out to him is right though." 
"...Heh..Is THAT what you think the deal is? Oh Inuyasha, you realllly need to learn to pay attention. I've repeated myself HOW many times and you still think -I'M- the one he wants to play with?" She asked with a amused smirk.
"...Well who else would...it..." Inuyasha trailed off and then blushed bright red as it dawned on him why Kagome had sent his clothes off to be cleaned when usually she kept the purse string tight. 
She had trapped him in the room unless he wanted everyone to see his baby outfit!
"Ding ding ding! Winner winner chicken dinner." Kagome giggle and tapped a finger on the pups nose. 
"I'D RATHER KEEP FILLING MY PANTS WITH CRAP THEN BLOW THAT BASTARD!" Inuyasha yelled.
"geez, say it a little louder, i don't think  everyone in the inn heard you.." She said wincing, and putting a finger to her ear. "And you WILL do this because I'm blowing though all of my savings keeping you in disposables. if you wanna keep pooping your pants fine...but we're switching to cloth diapers and YOUR washing them."
"...You know there are times when I reallllly hate you?" Inuyasha asked. 

Koga was all grins as he came into the inn and got Kagome's room number. he'd of course heard the rumors about how Inuyasha had gone from a bad ass to a smell one but he wasn't sure he believed it till Kagome had contracted him about a little deal. 
She'd of course offered herself up at first in trade for the shards but as tempting as that was (and it was VERY) there was one thing he loved the thought of more:
Making that mutt suck his cock dry while he was in a shitty diaper. 
It would be the ultimate combination of fulfilling a old wet drink of his and putting the mutt in his place and heck, he was getting ready to settle down and stick around the cave anyways.
Knocking on the door, Kagome opened it and smiled. 
"Koga, please come in, your date is ready for you." she said with a impish grin.
Yeah, he wasn't stupid, He knew part of her wanted to see this just as much as him with what a royal pain the pup had been.
"Why thank you Kagome." he said and strolled past her, look eyes on Inuyasha.
the pup was standing in the corner, naked save for a pair of what looked like diapers but make out of some weird material and had a bunch of animals on them and they were around his ankles. 
the reason they were was clear as even in the weak lamp light of the room, The Half demon's cheeks were bright red and Inuyasha was fighting back sobs.
"oh my, was SOMEBODY a bad boy?" Koga asked amused. 
"He tried to tell me that I couldn't watch, and even after I got him a jungle print rearz too." Kagome said in a mock pouty voice.
"...A what with the what now?" Koga asked, rubbing the back of his head.
"A expensive diaper from my time, but they hold a lot AND make him ever so cute." She explained.
"Shame on you Inuyasha! She went and spoiled you and you can't return the favor?" Koga tsk'ed and wagged a finger. "I have half a mind to tan those cheeks myself!"
"N-No please! I'll be good!" The pup yelped and then a spurt of pee came out of his less then impressive manhood soaking the corner.
"Pfffffttt..Well Ok. I suppose..but that was your ONE mulligan. if you misbehave again it;s spanky spanky time." Koga said then added. "and you better pull up your diapies before you flood the room."
"Yes sir." Inuyasha mewed, instinctively going beta in the state he was in and yanking his diaper up. "M-May I come out of the corner ow?"
"Wow, one spanking and he's so polite. you should of been spanking him this whole time!" Koga noted. "and yes you may buddy."
"oh, it doesn't last for more then a hour sadly." Kagome said going and taking a seat at a small table and wishing she'd brought her camera with her.
'I wonder what kinda money this would make in my time...ticking off a lot of fetish boxes here..' she mused. 

Inuyasha hated how small and weak he felt, it was just what happened after a good sound spanking over Kagome's lap and he was just glad he hadn't had to address her yet cuz when he was THIS subby he called her mommy without thinking about it.
He didn't have to ask what was expected of him as Koga took a baby bottle loaded with icky stink juice (Ok, that wasn't the name of it but it's what Inuyasha called it as it tasted as bad going down as it smelled coming out) and then sat on the bed and patted his lap. 
"Come here little guy, You look thirsty."
Inuyasha went to open his mouth to warn Koga of what that baby bottle of YUCK was gonna do but realized the pervy bastard already know and accepted his fate, toddling over and sitting in the demon's lap.
"Um.." Inuyasha started.
"Yes?" Koga asked.
"Mommy usually ha-" he started before being cut off
"Oh, Mommy huh? Adorable!" Koga chuckled with Kagome joining in. 
"K-Kagome I mean!" Inuyasha yelped and his hands covered his mouth. 
"oh No. Mommy sounds much more fitting, and I'm sure Kagome doesn't mind..right?" Koga asked.
"Pffftt..Not at all. but only if you make sure to call Koga daddy little guy." She called over.
"Took the words right out of my mouth! Now, you were saying babykins?" Koga asked.
"...Mommy Normally has me lay down and just put my head in her lap..Like..I dunno how this is gonna work...daddy." Inuyasha said, shutting his eyes tight as he said the D word and wishing he could block out the sound of Kagome laughing.
"oh well, not to insult your mommy, she's clearly strong enough to paddle your behind after all, but I think i can handle cradling a silly little pup in a big boys body." Koga chuckled and then moved Inuyasha with ease into the feeding position.
As much as Inuyasha didn't WANNA open his mouth, Kagome had done this with him more then once (though normally with honey sweeten milk as a reward) and his mouth opened up on it's on and then he took in the nipple and suckled greedily, even as he scrunched up his face. 
"Awww it's ok little guy, Daddy has something MUCH sweeter for you to suck on after this." Koga promised.
"Fuck yeah." Kagome mewed.
"Watch the potty mouth around the baby!" Koga scolded and frowned.
"Eep! Uh..Yes sir." She mewed as Inuyasha giggled a little despite all the YUCK in his mouth.

Watching Inuyasha work the bottle was having a conflict of interest rise up in Koga in more then one way. 
First: Inuyasha's eager nursing and greediness was making Koga start to tent his loin cloth and he wasn't sure if he was gonna be able to let the little guy finish his bottle, let alone burp him and want for him to go uh-oh.
Second: Inuyasha just looked so sweet and pure at the moment he wasn't sure if he could even bring himself to face fuck him anymore, though hell yeah he'd still play with the baby. 
Third: He was regretting the choice to let Kagome stay in the room already but knew she had a duty to make sure Kagome didn't hurt the baby (well beyond a spanking) 
Fourth: while he was of course going to hand over his shards, he wasn't sure if he was willing to hand over the cutie back to her when she clearly was going to keep being a mean mommy. 
All of this added up together made Koga sure of one thing,he'd gotten a crush on the dork without meaning to.
'Damn it!' Koga thought. 'I have to stop being such a sucker for cuties!'
Inuyasha had closed his eyes again, clearly the gooey mixture in the bottle didn't taste all that good but Kagome had promised that it worked wonders on clearing Inuyasha out when he got all backed up. 
"Actually, it might work too well if your sense of smell is as strong as his. all he can do is whine 'stinky!'" after he loads his pampers." Kagome had said.
well, ok..Koga's might of been even stronger but there was no way he was going to NOT see something that sounded THAT cute even if it stringed a few nose hairs.
A deep rumbling fart from Inuyasha's backseat brought him back to the moment and Koga went to say something when the smell hit him.
"Good god, what have you been feeding him!?" he asked, wrinkling his nose. 
if it hadn't of been for the fact he was holding the baby he would of pinched his nose shut!
"Oh, mostly bean paste and the like, food fit for a baby. Shippo gets a kick out of spoon feeding him." Kagome said.
"...Your kidding right?" Koga asked, raising a eyebrow.
"Of course I am. he's still on his normal diet of ramen noodles and whatever he can hunt." she chuckled. "you should of seen the look on your face!"
"you know, you're not funny." 

Kagome had to disagree there, but kept her mouth shut. while they had been busy she'd slipped in a pair of nose plugs and would of offered a set to Koga but he was turning out to be a real wet blanket. 
'Maybe when he's suffering enough he'll go back to making this hawt.' She thought and watched as Inuyasha started his pre poopie ass blaster attack. 
poot after rancid poot escaped the big babies back side as he finished his ba-ba and then OMG..
As Koga wiped the babies mouth and moved to burp him Inuyasha mewed.
"I'm sowwy I'm so stinky daddy." 
And the hell of it was, he honestly DID look like he was sorry. not his fake saying it with a smirk that she got. She wasn't sure if she should find that adorable or a piss off since she had been the one changing his shitty ass all this time. 
"it's Ok buddy. you're just a little pup who can't help it." Koga said and then had Inuyasha's head over a shoulder and was patting and rubbing his back.
Inuyasha mewed and then let out a massive belch that made Kagome jump out of her seat and landed painfully on her ass and the jolt knocked her nose plugs out.
As the full stink of the room filled her nose she whimpered and put her hands to her nose then got up and dashed out of the room quickly crying out a 
"I'll leave you guys alone later bye!" she stumbled in a blind panic to get to fresh air and didn't stop till she was outside and huffing the fresh country air.. or at least that was the plan till she got a lung full skunk scent.
"...Fuck it, still better then in there." 

Finding the nose plugs and cleaning off Kagome's and spotting the extra pair and getting them in Inuyasha's nose and his, Daddy and baby where able to enjoy each others company much easier now and Inuyasha found that if he didn't have to SMELL it, he liked the feeling of a squishy loaded diaper, triple so since Daddy had giving him a stinky horsey ride in his lap that MIGHT of made the big baby make a different mess in the front of his diaper. 
Likewise before he he got a diaper change Inuyasha returned the favor as best he could with his mouth (he was unskilled but Koga assured him that he would get lots of practice.)
That was because before Kagome came back Koga made a command decision for Inuyasha and carried the now clean little guy in just his onesie out of the inn and took his diaper bag with him. 
He left three things for Kagome in the room:
a note explaining that he had altered they're deal and was keeping Inuyasha to be HIS little boy, and advised her NOT to come looking for him.
As promised both of his jewel shards, and a extra one he'd earned recently before showing up, to show he could be fair
and Inuyasha's stinky diaper. 
Needless to say she was less then thrilled to have lost her boyfriend (even if she had been cucking him) though getting three of the shards was a major score. 
She totally could of done without having to come back into the room reeking of skunk and getting hit with the stink of the poopie diaper and while waiting for the twin stinks to fade off of her, wondered just how she was gonna explain this out to the others. 

Inuyasha for his part was quickly accepted into the pack and was everyone's little brother, beloved for the most part save for when he had a stinky diaper. 

The end