Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/5070520.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Rick_and_Morty
  Relationship:
      Rick_Sanchez/Morty_Smith
  Additional Tags:
      Watersports, ABDL, Diapers, fucking_in_diapers, Bladder_Control,
      Desperation, Underage_Sex, Grandparent/Grandchild_Incest
  Stats:
      Published: 2015-10-25 Words: 2908
****** Accident Prone ******
by yiffymorty
Summary
     In Rick's old age, he has become somewhat....incontinent. Morty tries
     to help him out.
Notes
     This is for the anon who requested diaper fic!
     I drew this Rick_in_a_diaper, too, because phoenixofsin is an enabler
     and I am weak.
     Fun fact: the diaper in this art & fic is a real pattern by ABU. I
     heard from a friend that the aliens disappear when they get wet, as
     an indicator that you need to change. And I think that is freakin'
     adorable.
See the end of the work for more notes
As a man of many secrets, Rick shouldn’t be so worried. Not only is he fearful
that someone might find out, he is thoroughly embarrassed of his new condition.
He can only hold off the effects of old age for so long, and while he is still
fit and very mobile, his abdominal muscles aren’t what they used to be. At
first, Rick only leaks a little bit into his underwear when he sits or stands,
but it never goes through to his pants. However, after suffering a particularly
bad accident one day while getting out of the ship, Rick realizes that this
isn’t something he can control.
He finally admits defeat when Morty nearly catches him stripping off his wet
pants in the garage and tugging on new ones—thank god there’s a table between
them. Rick goes online and, using a fake routing number, orders a sample pack
of discrete, adult-sized diapers from a website that specializes in them. Once
Rick intercepts the package before it reaches the Smith family’s home, he bolts
to his room and locks the door. Rick feels an overwhelming sense of shame when
he looks at himself in the mirror. He’s Rick motherfucking Sanchez, god dammit.
At least the diaper is slim enough to fit comfortably inside his pants. No one
will be able to tell, Rick constantly reminds himself.
He gets used to it after a while. It’s easy to forget what he’s wearing under
his pants in the heat of the action, running from whatever trouble he’s gotten
himself and Morty into on their adventures. It isn’t until he portals them home
that he realizes he’s leaked so much he’s flooded his diaper. Two dark stains
are visible on each of Rick’s thighs.
“Um, Rick?” asks Morty, stepping into the garage behind him, “D-d-did you sit
in something? Your ass is-is-is all wet.”
“I know, Morty!” snaps Rick, “I-I-I-I don’t need you to tell me that. I’m not
a-an-an-an idiot like yo-OUGHH-u, M-Morty.”
“Cut the crap, Rick! I know what’s going on here! Y-y-you’re wearing a....a-
a diaper,” Morty stammers. Rick’s cheeks burn; he wants to portal himself the
fuck out of there, but his feet are rooted to the ground.
“Yes, Morty, I am,” growls Rick, “A-and if you tell your mom or Jerry, y-y-
you’re fucking dead.”
Morty laughs, and Rick can see a fire dancing in his eyes. It makes his stomach
turn. Morty should be making fun of him by now, but the kid looks like he’s
thinking hard, his face otherwise unreadable. Rick isn’t sure which he prefers.
“I didn’t know y-you were into this stuff,” says Morty.
“Into wh-wh-what stuff, Morty?” Rick demands, dreading the response.
“Uhh, d-diapers and adult baby stuff?” comes Morty’s sheepish reply.
“Morty,” says Rick, sternly, “I-I-If anyone’s the adult baby here, i-it’s you.
L-like, where the fuck did you even get that idea? I-it sounds pretty su-OUGH-
spicious to me, Morty.”
“You’re unbelievable, Rick! Y-y-y-you’re standing right here, wearing a diaper
and you’re trying to pin this on me?!”
“If you have to know, Morty, because you’re a-a-a nosy little shit, this body
isn’t what it used to be. I’m s-still your fu-UUGH-cking badass grandpa, but
I’m eighty, Morty—eighty! Wh-wh-wh-wh-what do you think, this body is
impervious to the downfalls of old age? I fucking wish, Morty.”
“Jeez, Rick, I’m sorry,” stars Morty, apologetic at first, but his smirk
returns, “B-but yours don’t seem to be working very well. Y-you’re leaking, so
m-maybe you need a bigger size.”
“Fuck off, Morty,” snaps Rick. “None of this is any of your business.” He
stalks off into his bedroom, thoroughly humiliated, leaving Morty behind in the
garage.
                                  __________
They don’t speak of it again, until a package arrives in the mail a week later.
“I got this for you,” says Morty. It’s addressed to Morty Smith, but he hands
it off to Rick instead. When Rick opens it, the color drains from the old man’s
face.
“You piece of shit,” Rick whispers in disbelief. It’s a case of diapers, but
not the discrete kind designed for incontinence. It’s a case of patterned baby
diapers designed for adults.
“Th-they’re kinda hard to put on yourself,” says Morty, having done extensive
research online, “You might not be able to get th-them—”
Rick cuts him off again. “Okay, okay, I know I’m going to regret asking this,
but....why in the fuck would you get me something that I can’t put on myself?
Th-that defeats the purpose, Morty!” Rick freezes. That does defeat the
purpose, doesn’t it? Before Rick can comment, Morty shoulders past him.
“Suit yourself, Rick,” says Morty, looking back before leaving the garage, “I-
if you don’t need my help, then you can keep pissing your pants until s-s-s-
someone else finds out!”
Once the kid slams the door, Rick sighs and sits down, slumping in his chair.
He curses the wet spots on his thighs. He curses his bladder. He curses how
many times he’s teased his grandson for occasionally wetting Morty’s own bed.
This is the closest to karmic retribution he will ever believe in.
                                  __________
It was bound to happen sooner or later, but today is when Rick realizes that he
forgot to order more discrete diapers, and he’s faced with a dilemma—either
risk leaking all over himself, or wear one of the ridiculous poofy baby
diapers. He meets Morty in the garage, walking strangely so that he doesn’t
crinkle.
“H-hey, Rick!” Morty’s eyes light up. “You’re wearing....um. I don’t think you
have it on right.” Morty frowns staring at the conspicuous poofy lump in Rick’s
pants.
“Ohhh, so now there’s a ri-EUGHH-ght way and a wrong way to wear a diaper now,
Morty?”
“Y-yes, actually! If you don’t do the tapes right, th-they say it’ll come
apart. H-here, let me show you.” Morty approaches Rick, but the old man backs
away. “C’mon, Rick! You look ridiculous like this! I’ll show you how it’s
done—”
Rick sighs heavily, and lets Morty approach him. Morty tugs Rick’s pants down
just enough for the diaper to show. Rick looks down, noticing for the first
time that the pattern is little spaceships and planets and stars. Rick blushes
even harder—Morty bought these especially for him. They even have little aliens
on them. Fuck, Rick can’t help finding it adorable; even though he hates the
idea of his grandson changing him like a fucking baby, he secretly appreciates
sharing something so intimate. Morty kneels down and adjusts the tapes so that
the elastic fits snugly around Rick’s waist, just like Morty saw in the video
tutorials he’d watched on YouTube. He makes sure the tapes stick to the plastic
instead of the papery fabric, and after he tugs a little to test the quality if
his handiwork, Morty zips up Rick’s pants and playfully pats him on the ass.
“You’re all set,” says Morty, blushing to the tips of his ears. Rick looks
himself over. He’d thought the diaper would show a lot more than it actually
does, now that it’s on right. The only tell-tale sign is the soft crinkling
when he walks. Luckily, their next excursion is to a planet inhabited by a
species which does not urinate from in between their legs, so Rick being found
out is a non-issue. At least, not until Morty pulls him aside. “If you make it
to the ship without pissing yourself, I’ve got a big reward for you, grandpa
Rick.”
Rick’s skin prickles at that. Sure, he and Morty have been flirting for a
couple of months, just seeing how far they can push each another before one of
them cracks. Rick hadn’t expected it to be himself. “Yeah? Y-y-you better not
be fucking around, M-OUUGH-orty, because you have yourself a deal.” Rick knows
he’s treading a tightrope; it’s not like he can just hold it. But he does his
best, and by the time they’re ready to leave, Rick is doubled over with one
hand gripping his crotch. “I-I-I made it,” he hisses, “L-let me fucking piss,
M-Morty!”
Morty smiles and nods at him, taking pity on the man. “Y-you can go now, Rick,”
he says. The old man sinks to his knees. Rick’s eyes are scrunched tight while
he lets go, pissing freely and soaking the diaper. Much unlike the others, this
one holds a lot more. By the time Rick has emptied his bladder, the wetness has
absorbed in the padding around him. He reaches behind him to feel for any leak,
and sighs in relief when there isn’t one.
“See, Rick? That wasn’t so bad,” says Morty, kneeling at Rick’s level, “I th-
think you earn—earned it today.”
Rick is weak in the knees from the effort of holding it in, but he gets up
anyway. Morty comes up behind him and presses Rick into the side of the ship
with a soft oof! “Relax,” murmurs Morty, his chest against Rick’s back. He
kisses the man’s neck and trails his hands down Rick’s torso until he reaches
the waistband. Morty unzips Rick’s fly so that he can easily slip a hand down
the front of Rick’s warm, wet diaper. “Daaaamn,” he whispers, “You soaked the
thing, h-huh? I bet you were holding it a long time.”
Rick groans and nods. This is all true, but hearing it come from his grandson’s
dirty mouth, combined with the warmth between his own legs, Rick can’t keep his
dick from throbbing. “I-is-is this what gets you off, old man?” Morty growls
into Rick’s ear, giving his cock a squeeze, “You can go whenever you want, and
sit all day in your own hot piss. These things hold up to four—f-four gallons,
y’know?”
Rick’s breath fogs up the glass window, breathing faster and harder while Morty
touches him. Morty feels a hot spurt of liquid trickling down his hand. “Not
done, Rick?” he asks, but Rick only whimpers, unable to tell if he needs to
piss or cum. “It-it’s okay,” coos Morty, “I’m gonna take real good care of
you.”
Rick straight up mewls at the that; the idea of submitting to Morty in the most
intimate way he can think of. Morty continues jerking him off until Rick is
cumming hard into his already soggy diaper. Morty raises his fingers to Rick’s
lips, forcing two into his mouth. Rick hums in contentment as he tastes himself
on the boy’s fingers, sucking them clean of his own piss and cum.
“Hah, y-you’re gonna need a change when you—when we get home,” says Morty,
climbing into the passenger’s seat. Rick has never flown them home faster than
he does today. Morty shifts uncomfortably in his seat. “You mother fu-UGHH-
cker,” says Rick, “You’re getting off on this, too, you sick little shit.”
Morty laughs. “I-I’m a budding teenager, Rick, I see a-a-all sorts of stuff on
the internet. There’s a lot of freaky shit on there, y’know? After you’ve seen
every normal porn movie on the internet, y-you sorta....move on to more
hardcore stuff, right?”
“You’re fourteen goddamn years old, Morty! It-it-it-it’s statistically
impossible that you’ve watched every porn video—”
“Oh my god, Rick! Listen to me, a-a-alright? M-maybe I’m a little bit into the
i-idea of....y’know, t-taking care of someone like this?”
“Jesus,” says Rick, shaking his head, “And all this time I thought I was the
weird one.”
Morty barely has time to pout before the ship comes screeching to a half just
outside the garage. He catches Rick and unexpectedly pins him to the wall.
“Your r-rom, now,” he orders, and Rick is too high on adrenaline to complain.
                                  __________
“M-man, Rick,” says Morty, eyeing the man who has just flopped down on the bed,
“What would you have d-done if I didn’t put that diaper on you, huh? Y-y-you
would’ve pissed yourself and leaked like crazy!” Morty yanks Rick’s pants off
and gapes at how large the diaper had gotten; Rick must’ve gone a lot.
“Y’know,” says Morty, grinning nervously, “Th-th-the aliens on the pattern are
supposed to d-disappear when they get wet.”
Rick stares down between his legs. Sure enough, the green cartoon aliens have
faded significantly. Morty braces himself with his hands on Rick’s knees. “H-
heh, now I’m gonna have to change you, y-you baby.” Rick throw an arm over his
eyes and tries to bite back a whimper. Molten arousal pools in his stomach and
sets his nerves on fire. Morty pulls the wet diaper out from under Rick’s
bottom and he inspects to see that the tapes are still intact. He looks Rick
straight in the eye as puts the soggy diaper on himself, readjusting the
waistband so that it fits him. Rick’s size is a little large on him, but for
this, it will do. Morty wiggles around in Rick’s warm piss, making sure the man
can see how much he’s enjoying it.
Morty fetches a clean diaper and some items he’d found lying around Rick’s
room. Rick eyes him curiously as Morty gets to work, cutting a hole in the back
of a fresh diaper and lining it with medical tape. Eventually, Morty slides the
modified diaper under Rick’s hips and fastens it like usual.
“T-t-turn around, Rick, hands a-and knees,” stammers Morty in his most
authoritative voice. He thinks Rick might make fun of him, but instead the man
does as he’s told. Morty grabs a bottle of lube and climbs up onto the bed. He
pours a liberal amount onto his hand, spreads it between his fingers and screws
them gently into Rick’s asshole, two at a time.
Rick moans out load, catching himself in the middle of it and burying his face
into his pillow. Once thoroughly lubricated, Morty shuffles his own diaper down
enough to free his cock. He slathers himself up and mounts Rick, grinning
wildly as the old man whimpers beneath him. Rick’s whines turning to moans, his
moans turning to muffled screams as Morty fucks him through the hole in his
diaper.
“Y-you gotta piss again, Rick?” taunts Morty, “P-piss yourself, and I’ll jerk
you off while I fuck you.”
Rick hisses, burrowing deeper into the pillow. “Let go,” says Morty, and
there’s just something about that tone coming from his grandson’s mouth that
makes Rick’s abdominal muscles go slack. He rolls his hips as spurts of piss
soak his diaper, and Morty picks up speed. “Y-yeah, grandpa Rick, th-that’s
it,” growls Morty, and as promised, he reaches down the front of Rick’s diaper
to squeeze his cock. Morty works up a rhythm of fucking Rick and jacking him
off, too, rendering the man utterly useless.
“Cum for me, Rick,” purrs Morty in the old man’s ear, and Rick can almost hear
him smirking. “If I cum first, you don’t get to.”
That certainly gets his attention. Rick bucks wildly, thrusting into Morty’s
hand and catching hold of the edge of his orgasm. He reels it in and rides it
out, splattering his diaper with thick cum. Morty seizes up not 30 seconds
later, and cums with his dick buried deep inside Rick’s ass. When Rick
collapses, Morty falls on top of him. It’s only when Rick tries to wriggle free
that Morty pulls out, connected by a sticky train of cum.
“You ruin me, Morty,” groans Rick, turning to the side and finding one of
Morty’s hands to hold. Morty chuckles and kisses the side of Rick’s neck. “So
you l-liked that, huh?” teases Morty, but Rick can only hum his appreciation.
They both strip and Rick leads Morty to the bathroom.
“Uh, Rick?” asks Morty as he steps into the shower, “I-I dunno if there’s
enough room—” Morty is cut off when Rick steps in behind him, wrapping his arms
around Morty’s torso. The boy sighs and leans his head back against Rick’s
chest.
“So, Rick,” starts Morty again, “Wh-what d’you think about my taste in diapers
now?”
“Not bad,” slurs Rick, resting his chin on Morty’s head. Morty reaches up with
soapy hands and runs them through the older man’s hair.
“Just ‘not bad’?” questions Morty, “Y-you were shouting pretty l-loud, Rick.”
“Fine, Morty, wh-what do you want me to say? That I fucking loved it, that I’ve
never gotten off like that before. You want me to thank you, is that it?”
“Jeez, Rick!” cries Morty in annoyance, but he still lets Rick drag his nails
over the boy’s scalp while Rick washes Morty’s hair. “Y-you could try being
nice to me for once! I kn-know you liked it—you liked me fucking you, you liked
wearing those poofy space diapers—so just say it, alright?”
“Yes, Mo-OUGH-rty,” grumbles Rick, “I fucking loved it. But even if you did
fuck me into oblivion, you’re still a pain in the ass.”
“I’ll take it,” Morty grins, turning the water off and wrapping himself in a
towel. He ruffles Rick’s hair so that it sticks up at even stranger angles.
Back in Rick’s room, Morty pads him up again, and crawls into bed, otherwise
naked. “Y-y’know something, Rick? I’m definitely gonna be th-th-the pain in
your ass tomorrow, old man.”
Rick mumbles a barely audible “fuck you” before drifting off to sleep. Morty
soon follows, pressing himself up against Rick’s diaper. He was uncertain at
first, but Morty knows now that he’d made the right decision.
End Notes
     yet another weird kink thing from yiffymorty! *DEEP SIGH*
     I really enjoyed writing this one, and I hope Rick and Morty aren't
     too OOC? I worry about that a lot ;;
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