A Friendly Contest

Toriel leaned onto the window frame and watched her hudband carry their mail the short distance from the mailbox to the door. It was a plesure she had every other week or so, whenever Asgore's “special supplies” were dropped unceremoniously in a discreet and highly secured carboard box in front of their house.
She chuckled lightly as the nearly-eight-foot-tall mountain of muscle, fat and fur looked nervously around himself as if he was carrying some sort of forbidden weapon, before awkwardly setting off towards her at a pace that was just a little too fast to be inconspicuous.
He really was just a massive dork sometimes.
“Anything interesting?” she asked in an overly normal tone, and watched him almost drop the big package in surprise at the sudden sound of her voice.
“N-no, noth-... I mean, yes. The usual.” He stammered, eyes darting back and forth between the neighbouring houses. “You know, just some, uh... medical supplies, for the, um...” He stuttered, and Toriel couldn't comprehend how he had done this so many times without finding a well worded way to talk about his strange form of stress relief without breaking down into nervous babbling.
“Oh my god, Asgore. We both know it's full of diapers. Now get in before someone starts wondering why the former King of Monsters is shivering in front of his own house, looking like he's seen a ghost.”
The way his eyes grew wide whenever someone mentioned “The D word” would never stop being fascinating to Toriel; His shoulders jumped up, his eyes grew wide, and his breath seemed to stop somewhere between his lungs and his mouth.
He stood there wordless for a moment, before regaining his composure. But when he did, his eyes darted frantically back and forth to see if anyone had heard.
“Tori!” He eventually whispered in a nearly panicked voice. “Not so loud! What if someone-”
“No one's here, Asgore. It's early Saturday morning. Frisk and Asriel left to go camping for the weekend just yesterday. Our neighbours are both on vacation. Just get inside so you can un-box those diapers and I can put one on your butt. Or maybe even two.”
His body winced again, but this time he grabbed the door instead of replying, and shut it hastily behind himself before giving a deep, baritone sigh of relief.
“Goodness... I get nervous every time. Look.” He held up a hand, and Toriel could see it trembling lightly.
“Well you get nervous over everything, you big fluffy lunk.” his wife retorted. “Now are you gonna stand around there whimpering, or will you open it?”
To the unitiated, it would look like the goat-lady was terrorizing her poor husband. But for him, it was all part of the play; Though Toriel never quite understood why, some part of this light scolding seemed to excite the gigantic monster. And true enough, when he spoke up again there was a certain childish glee in his voice, below the usual skittish rumbling.
“Well, I suppose I should...” He replied and stepped away from the window. “I ordered a different batch this time. You wouldn't believe how many brands and types the humans have; Back in the underground I thought I was the only one...” He continued as he sliced through the duct-tape with his razor-sharp claws. “But it turns out quite a few humans are into this too. Who would've thought...”
Toriel stood back and watched her huge husband rant into the air as he dismantled the intricate packaging and overzealous amount of black tape. Asgore's strange infatuation with the puffy incontinence pads would forever be strange and a little offputting to her. But the joy and excitement painted all over his face was more than enough payoff for her. It was like watching a child opening his Christmas presents, only it happened multiple times a month.
“Yes, who knew humans were really just big babies too...” She replied in a semi-strict voice.

“Ah, there we go...” He eventually exclaimed as the final layer of tape gave way, and he gave a short gasp when he laid eyes upon the contents. “Oooh, look at these...”
Packaged neatly in the brown cardboard box were rows upon rows of thick white diapers. Though they were folded so she could only see a fraction of each, Toriel could make out prints of little cartoon animals on the plastic backing.
His eyes shimmering, the former King of The Underground pulled one up from the box and unfolded it, bringing a waft of plastic-and-velcro scent to both their snouts.
“Aaahh... Look at this!” He mumbled, and his wife got a picture of a man sampling fine wine or hand-crafted cigars in her mind.
He turned and fondled the padding in his hands, and ran his fingers along the absorbent lining with the demeanor of a true expert.
“It has little drawings on it.” Toriel commented flatly. “Fascinating.”
“Oh, they're more than just patterns, Tori.” Asgore replied knowingly. “They're there so you can see how much you've used them. You see, the little animals disappear when they get wet, so that when you, umm...”
The fluff on his cheeks bristled a little as he blushed.
“...So when you go potty in them like the big baby you are, the cute critters vanish” His wife finished for him, and his blush deepened.
“Y-yes...”
“Well, what are you waiting for? Get your big royal pants off so I can put it on you. Then you can show me how the little animals work.”
His eyes widened. “What, right here in the entrance hall? N-not even in the bathroom? What if someone... Comes in?”
She sighed and locked the outer door. “There, now no one will come in. And why should we do this in the bathroom? You're clearly not ready to use it for its real purpose anyways.”
The giant goat-monster pondered this for a moment, and Toriel could almost hear the gears creaking in his head. But eventually he gave a sheepish smile and undid his belt.
“Y-you're right. I really want to try these on.”
He got out of his clothes almost unnervingly fast for someone his size and age, and after only a few seconds Toriel was treated to the familiar sight of his naked lower half as he laid down on his back.
“You sure are eager today, aren't you?” She mused, unfolding one of the huge samples from the box. “Any special occasion?
“J-just... It's been a while since last time. Been a little stressed out recently. I can't stop thinking about the remaining tasks I have over the monsters from The Underground. I still have a lot of responsibility...”
“Aww, you poor thing.” She replied as she folded the seat of the diaper around his butt and tightly over his generous (and already semi-hard) package.
Toriel pressed her palm down on the front of his diaper to hold it in place so she could fasten the tapes, and felt his member harden and grow through the thick padding. Even after all these years together, she couldn't help but feel her heart rate rise whenever his monstrous manhood grew like this in her grasp.
“Already excited, hmm?” She teased mockingly and tightened the diaper, squeezing a low moan from his chest.
“Mhhmmm...” He murred. “You are much too good at this...”
Satisfied with her work, she pulled the tapes onto the plastic front and fastened them snugly. She then gave it a friendly pat before fishing another sample out of the box.
“Alright, now it's my turn.” She exclaimed flatly and handed it to her husband. “Mind letting me a hand?”
Asgore blinked. “Wh-what?”
“I said: Now it's my turn. You know how to put one of these on, right?”
Almost demonstratively she started removing her pants as Asgore stared in disbelief.
“B-but I thought you didn't like wearing these.”
“Oh, shut it you. They can be comfy at times. Besides, I wouldn't want you to feel lonely, now would I?” She gave him a little kiss on the cheek before pulling off her underwear. “Now get to work.”
He complied almost instantly as she laid onto her back with her butt in the air. She had done this a couple of times before, but she still shuddered as he excitedly pulled the massive garment tightly across her underside; The pillow-like texture of diapers was strange, yet not entirely unpleasant to her. She would've actually found them highly comfortable if it weren't the dirty acts they were associated with.
“There, all done.”
Asgore leaned back and admired his work, and his wife could see the massive bulge at the front of his diaper where his manhood strained against the fabric.
“Oh my, they look dashing on you.”
Toriel looked down and blushed; “Dashing” wasn't exactly the word she would've used. “Childish” seemed more appropriate, with how it engulfed her entire groin, the colorful little cartoon animals leering up at her in a mocking fashion. She really did feel like a child with these on.
“Hm. Dashing.” She mumbled as she got to her feet. “Sheesh, how do you even walk in these?” The padding was so thick, she couldn't close her legs properly, and ended up waddling awkwardly.
“That's the beauty of it.” He replied. “You don't. I mostly use them right away, so I don't wander about in them that much. But I must admit, these are even more heavy duty than my normal ones.” He caressed his diaper, and crinkling noises filled the air. “So what now? We have a whole weekend ahead of us, and a box full of these.”
Toriel pondered this for a minute, before shrugging; “I suppose we could just have a good old fashioned lazy saturday. My job has been a little hectic as of late, with the exams coming up and such. I could use some time to unwind as well.”
“That sounds wonderful.” He replied.

And so they spent most of the morning and early afternoon cuddled up on the couch, just enjoying each other's company. Times like these were rare; No interruptions, no loud children, no obnoxious calls from their jobs. The sun crept lazily across the sky, up from the horizon and over the endless blue. And it wasn't until it approached its western destination that Toriel started growing a little restless. They had spent most of the day snuggling against each other's chest, lazily kissing and talking about everything and nothing, like only a sappy old couple could.
“Hey Gori.” She eventually mumbled, her face halfway buried in his bountiful chest-fluff.
“Yes?” He purred in response, almost half asleep.
“You wanna try something fun?”
“Like what?”
She could sense a subdued excitement somewhere in his voice, and it was accompanied by a subtle throb from somewhere below her; They had been laying with their diapers pressed together, and she could feel him growing a little hard through the two layers of padding.
Knowing this, she rubbed against him in a not-so-subtle lewd manner and felt him grow even more.
“You mentioned earlier how the little critters on the padding disappear when they grow wet, right?”
“Mhm?”
“Wanna... wanna see who can keep theirs clean the longest?”
She felt herself blush a little as she said it; It ended up sounding so much more naughty than it had in her head.
But Asgore's face lit up in a massive, red-cheeked smile at the notion. “Now that sounds like an idea... But I don't really need to go at all. How about you?”
Toriel did an internal check, and was surprised to find that she was a little disappointed at how empty she was.
“Me either. Buuut we could always fix that.”
Almost abruptly she got out of the couch, and was reminded of how awkward it was to walk in the heavy padding.
“What are you doing?” her husband asked as she headed for the kitchen.
“Just mixing up something fun for us to do. Would you mind turning on the TV, and switch channels until you find the most boring, sappy and uninteresting human soap opera or series of all time?”
She heard a deep giggle from behind. “Leave it to me, honeybuns.”
With the noise of the TV humming from the living room, Toriel started rummaging through the kitchen drawers. Iced tea, coffee, soft drinks.
Satisfied with her haul, she then headed for the bathroom, and opened the medical closet. The orally applied laxatives were hidden on the top shelf, out of reach for both Frisk and Asriel, (Though that probably wouldn't last, with how quickly the latter one was growing) and she snagged a handful of them.
Upon leaving, she couldn't help but give the toilet an amused grin, and mumble a quiet “Not today, old friend” under her breath.

A few minutes later she emerged with two cups and a massive jug of drink in her hands. Asgore gave her a wide-eyed gaze.
“Oooh. I think I understand what we're doing.”
“Oh, you bet.” She replied, plonking it down on a table next to the couch. She gave the TV a quick glance and grimaced. “Urgh. A war movie? You couldn't find anything more romantic?”
“Look again.” He responded, and there was something in his voice she couldn't quite place. A strange intonation between sadness and humor.
Toriel sat down next to him and gave the screen a more thorough look. At first she couldn't quite place what her husband was talking about; to her it seemed like a normal violent human fantasy war movie, the kind she would find Asriel and Frisk sneakily trying to watch without her knowing.
But suddenly she caught eye of something eerily familiar in the middle of a blood-soaked battlefield, and she couldn't suppress a gasp.
“That... That's your old set of armor!”
“It sure is.” He responded somberly. “It's a historical recreation of the war between humans and monsters. And a pretty bad one at that; They even got the weaponry wrong. I was using a trident, not a spear. And the person playing me is just clearly a human in a suit. Besides, they show me as a cruel and inconsiderate demon... I-I wasn't that bad, was I?”
She could hear his voice tremble for a moment, and got a sting of guilt; He really wasn't a cruel person, just a bit... indecisive at times.
“Can... can we watch something else?” she asked. “I don't want to talk about the past like this.”
“No, I think it's pretty funny, actually.” he murmured, and she looked up at him, surprised.
“The humans seem to have a rather vague understanding of how things actually went down back then, and they've already messed up most of the small details. I think it could be fun. I timed it well too; this is just the introduction I think. I want to see what else they got wrong.”
She looked back and forth between him and the TV, indecisive. She knew full well how painful the past was to her husband.
But her train of thought was cut off by a roaring burst of laughter from her side, and she turned to Asgore, who was doubled over with tears in his eyes, pointing at the TV.
“Look! Look! Ahaha! Is... Is that supposed to be you? Ohoho my god!”
Incredulous, she gazed at the screen, and sure enough: She could see a human wearing some sort of strange costume with a goat mask. But the only thing even remotely familiar to her was the emblem on the person's robe: The symbol of The Underground.
“Hey, what the fuck!” She shouted and sprung to her feet, haunted by another peal of roaring laughter from Asgore.
“That's just a goat! And it's fat! Who the hell made this?!”
“Cahhh... Oh dear me, I can't breathe!” Her husband wheezed from behind her. “C... calm down. We have to watch this, it's too good. Come on, sit back down... Oooh, my poor sides...”
“But... I... Urgh, fine.” She eventually growled. “Humans.... pah.”
As her rump hit the couch, she suddenly remembered that she was wearing a diaper. She had somehow completely forgot about the whole situation when the ridiculous display on the screen had started.
She took a couple of deep breaths to calm herself. “Okay. I actually had a slightly different plan, but here are the rules...” She pointed towards the jug and the cups. “Every time the humans get somthing wrong about us, we drink one glass of that each. Whoever has to go use the bathroom first loses. Simple.”
“What's in the jug?”
“Liquid desperation” She replied. “Mixed it myself. Stronger than most laxatives.”
She reached over, grabbed the jug and poured to brimming cups. “Here, take one.”
They clinked the glasses together.
“Here's to historical accuracy.” She mumbled with one eye on the screen, and emptied her glass. The liquid didn't quite taste foul, just strange as it passed down her throat to wreak havoc on her stomach. Asgore followed suit, before grabbing the jug himself.
“And here's to goat masks.” He mused as he poured two more cups.

The movie crept by painfully slow. Within the first five minutes the jug was down to half. The humans had clearly based it off singular anonymous interviews and speculation, because hardly anything was correct. And after just a twenty minutes the jug was empty, Toriel's belly was full, and she was already feeling an alarmingly powerful pressure from her bladder.
It was about when a human with a horribly fake fish-mask and plastic armor showed up, chucking neon-blue spears around that she had to speak up.
“Ungh... can we turn this off? I think I'm gonna be sick. I can't watch much more of this.” She pressed a hand to her belly and clenched.
“Yeah, you're right.” Asgore agreed. “It was funny at the start, but now it's just a little sad. I-is that supposed to be Mettaton? O-oh dear me... No, I've had enough.”
As the screen returned to black, Toriel felt the full pressure hit her; She had been so distracted by how terrible the show had been, that she hadn't noticed how her bladder was screaming for release. But now she found herself squeezing her thighs together and doubling over. She could see Asgore performing a similar potty dance next to her.
“You need to go, big guy?” She mused, and tried to hide the signs of her own desperation. “The potty's right upstairs, you know.”
All she got in reply was a subtle groan and a squirm.
Though she hadn't needed the bathroom this bad since she left the underground, she was determined not to let him win.
So it was with great effort that she got up and threw her leg over his waist, straddling him as she bore down on his lower stomach.
“What's the matter, fluffybuns?” She whispered in his ear. “You're not gonna lose to little old Toriel, are you? Are you just gonne go right in your pants like a little child?” She rocked back and forth on his huge belly, and got a surprisingly pleasurable feeling from the thick padding as it rubbed against her undercarriage. She was almost starting to see how people could enjoy this.
Under her Asgore scrunched his face up.
“Ngh... Can't hold it...” His voice was so deep Toriel felt like it could could cause earthquakes, and stood in stark contrast to his childish utterings.
“Well you better” She replied, pressing down on him even harder. “Or you're gonna have to sit in it for a while, just like a big ba-”
Toriel stopped mid-sentence. Her taunting had been interrupted by the shameful and highly recognizable sound of pee rushing out of a bladder to saturate the thick padding of a diaper.
And as if to confirm his loss, Asgore's face went from strained to helplessly relieved.
“Aaaaaahhh~”
As his spontaneous sigh drew out, the trickling noise intensified to a veritable flood, and his wife looked down to see the stain on his diaper grow from the size of an inch in diameter, to two, and then three, before eventually covering the front entirely. And true enough; The obnoxiously cute little animals faded one by one as his warm urine soaked and flooded the pillowy briefs. Toriel kept her pressure, and she could feel his bladder shrinking as all its contents were drained into the diaper.
The royal release lasted for an impressive half minute before slowing back down to a trickle, and then stopping.
With a blissful sigh the king leaned back, and Toriel felt herself slide down his belly until her butt rested on his groin, the warmth from his accident radiating through her own diaper. And much to her surprise, she could feel something hard poking at her cheek.
“Y-you can pee even when you're hard like this?” she blurted out, taken aback.
“I... I've had practice....” he mumbled, blushing heavily. “Whew, that feels good though. A-and you're not even troubled by it at all... You must be really strong.”
That part wasn't exactly true; Toriel could feel her muscles starting to fail just as he said it.
“That's right,” She retorted hastily to save face. Her insticts were screaming at her to make a run for the bathroom, but she knew she wouldn't make it. And as she gazed down on her husband's bashfully aroused face and felt his throbbing erection at her rear, she got an idea.
Though it still seemed quite disgusting to her, she felt like getting a little experimental with her advances.
“I-I would normally give you a spanking for being such a naughty boy...” She huffed as her floodgates opened. “...But I suppose this will have to do for now.”
She had only wet a diaper once before, and that had been somewhat involuntary; it had come as a reflex from voiding her rear, and she had hardly felt it. But this time the full realization came to her just as the trickle began: She was peeing her pants like a little schoolgirl, and she halfway expected to feel the warm liquid running down her inner thigh. Her instincts told her to stop it and clench tight, but the relief was too great, and she instead ended up pushing even harder, distantly feeling the warmth starting to spread across her groin as the diaper did its job of compensating for her accident.
It wasn't until halfway through that she realized something was wrong; There was a more subtle pressure approaching from further down in her system, and it was approaching fast.
So fast in fact, she didn't even notice it before it reached a critical point. She gasped and started moving her hand towards her rear, but it was too late, the momentum was too great.

With an unceremonious “Splrt”, the former queen of The Underground filled the rear of her diaper as well, without any chance to stop it. It caught her completely off guard. The loud crinkling did little to douse her shock, and the fact that she was still in the process of emptying her bladder didn't help either.
In just a split second she had gone from sitting in a wet and slightly shameful pillow, to a mobile dump of her own making.

She took a few shallow breaths before continuing her wetting; No need to lose face now.
After roughly ten more seconds she plopped back down in a completely ruined diaper, and felt her mess squish all over her bum as it made contact with her husband's groin.
But no sooner than that, could she hear a groan escape his lips, and feel him thrust weakly upwards. In her dazed state it took her a few seconds to realize that he was having an orgasm, even after seeing his clenched teeth and wide, strained smile of bliss.
Her mind managed to perfectly split itself:
One half felt like gagging in disgust at the feeling, the smell, the shame of performing such a rancid act, drowning in shame for lowering herself to such an infantile state.
But the other half felt like roaring in ecstacy from the relief, the warmth, and the squishy texture of the padding as it was forced against her crotch, pushed upwards by Asgore's reckless thrusts.

But after only a couple seconds of hesitation, the latter part won by a hair's breadth. Instead of whimpering in self-loathing and disgust, she fervently thrust herself forwards onto his chest, and into a deep, intimate kiss.
She didn't know for quite how long, but it must have been at least a good couple minutes of tongue-wrestling before she unlatched herself, chest heaving.
She hadn't felt so excited, conflicted, disgusted and aroused in many many years.
Asgore was the first of them to catch his breath.
“Hah... O-oh goodness...” He rumbled. “Tori... I didn't know you... had it in you...”
“Neither did I...” She replied before getting back to her senses. “I... I mean, it's not that big a deal. I've done it before. I'm not a big baby, you know.”
Right. Keeping face.
She pinched his cheek lovingly. “You didn't do quite a bad job yourself, you know. Seems like you spilled more than pee in it.”
“Y-yeah. You too...” He stammered in return, and she felt his hand caressing her butt.
Still not quite sure how to feel about this, Toriel reeled for a moment; The smell of her blowout was starting to seep into her nose along with the full realization of what she had just done. She felt like she would need some time to think about this, to process it all.
“Alright.” She stated. “I-I think that's enough for me right now. This whole thing is starting to get... uncomfortable.”
Asgore nodded. “Mhm. The shame usually sets in at about this point for me as well. Shall we...?”
“Yes. I still can't be bothered to sit around in this. Urgh.”
There was still one thing puzzling her, and even with the shame slowly rising up her neck, she had to ask.
“How... how did you manage to only go number one? For me it just... came out by itself.”
The king smirked. “Well, as I said... I've had some practice. A proper king needs a throne to conduct his real business.”
“A porcelain throne, I take it?”
“Not necessarily. A bed would do nicely as well.”
“...I see.”
Clumsily she got off him, and had the displeasure being forced into a wide-legged stance, her thighs kept apart by the engorged padding.
“Huh. I even have to walk like a baby. What an ordeal.”
She just barely managed to catch a glimpse of him grinning, before he hastily covered it up.
“Oh, shut it you. You still lost.” She grumbled. “Which means you're gonna be the one cleaning me.”
“Of course.” He replied simply, with just the shadow of a childish grin on his lips. “And you will give me a change in return, I hope?”
Toriel pondered for a second. “Of course I will. Can't let the baby go to bed in a wet diaper, now can we?”
She set off for the stairs to the bathroom with a waddling gait, before adding:
“And I still need to give you your punishment for losing. I suppose you'll fetch the paddle?”
The reply came excitedly. “Of course I will.”