Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/11367765.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      DCU
  Relationship:
      Dick_Grayson/Jason_Todd
  Character:
      Jason_Todd, Dick_Grayson
  Additional Tags:
      Monsters, Xenophilia, Weird_Biology, Dubious_Consent, Animal_Instincts,
      Rimming, Prostate_Milking, Wet_&_Messy, Knotting, Come_Inflation, Blood
  Stats:
      Published: 2017-07-01 Words: 2132
****** Thrill Me, Chill Me, Fulfill Me ******
by MissNaya
Summary
     Dick's been transformed into a monster, and Jason really should help
     figure out how to cure him. But first, he indulges in a secret
     fixation he's had for a while.
Notes
     so this all started when I shared an idea on my tumblr about
     Robin!Jason having a monster kink and buying a bunch of Bad Dragon
     toys to try and fulfill it. this fic is a slight AU based on the
     Night of the Monster Men storyline, where Dick is transformed into a
     monster. rather than taking place in current canon, it takes place
     when Jason was still Robin. he's about 15/16 here.
     thanks to the anon who sent me this_request!
“...Dick?”
Dick doesn't answer, of course. Can't answer, not with that fang-lined beak of
his. He stares at Jason from behind the glass of his enclosure, head cocked.
A few levels up in the central hub of the Batcave, Bruce and Alfred are working
hard on a cure. Jason isn't supposed to be down here, but try as he might, he
couldn't stay away. The sight of Dick as a monster is just so enticing that he
has to stare. Dick's eyes are terrifying, black with pinpricks of white in the
center, but the way he looks at Jason isn't entirely malicious. When Jason
presses a gloved hand against the glass, Dick makes a trilling noise, beak
tapping against the barrier as he tries and fails to bite. Even then, it seems
more curious than anything.
“You in there?” Jason tries after another moment. “Can... Can you understand
me?”
If he can, he doesn't make it obvious. Those eyes bore holes into Jason until
he lowers his hand, at which point he sinks down in his enclosure to try and
keep up with it like a cat going after yarn.
It's still probably a bad idea to unlock the cage and step inside of it.
Jason does it anyway.
Dick backs away and sits up on his haunches, eyes locked on Jason as he shuts
and seals the door. Another trilling noise bubbles out of his throat, this one
closer to a growl, beak open to show off rows of pointy teeth.
“It's okay,” Jason says, standing his ground. He raises his hands to show he's
free of weapons, then slowly sinks down onto his knees. “See? We're okay.”
Dick creeps forward, impossibly big, making a slow clicking noise. Jason sits
stock-still, moving nothing but his eyes. They trail down, from the blue
stripes on his chest to the smooth expanse of nothingness between his legs.
Jason must really be out of his mind if he's doing all of this for what might
amount to nothing, but he's in too deep now. Dick's hot breath puffs out over
him and musses up his hair, and Jason shudders, letting himself be sniffed.
Examined. Even if he gets nothing else out of this ill-advised encounter, the
memory of this helplessness will stay with him when he needs it.
“...Dick,” Jason says, moving shaky hands to lay them on either side of Dick's
beak. “Dick, if— if you're in there, let me know, okay? Uh, blink three times
or something.”
Dick stares at him with wide eyes for an impossibly long amount of time.
Good.
Jason pulls in a slow breath and sits back on his elbows. When Dick doesn't
make a move to tear his throat out, he rolls over onto his stomach, rising up
on his hands and knees. And it's terrible, what he's about to do, but this is
the whole reason he came, and he can't stop now. Not after he's thought about
things like this for so long.
Hooking his thumbs under the waistband of his Robin shorts, he slowly pulls
them down.
He's not wearing anything under them, and the sudden rush of air makes him feel
clammy. He's already wet, lube smeared inside him and around his hole from when
he fucked himself open earlier with a toy from his secret stash. He didn't
come, though, and now he can feel himself start to get hard again, vulnerable
and waiting.
At first, he isn't sure if Dick will know what to do. He makes that odd noise
again, the rumbling sending vibrations straight to Jason's cock. Then he leans
forward, and Jason can feel the cool hardness of his beak as Dick sniffs at him
like an animal. His heart races for a second when Dick nips his skin near where
his thigh meets his ass, but then he feels a hot, slimy tongue slide up between
his cheeks, and he has to clamp a hand over his mouth to keep from crying out
in alarm.
The tongue is big, bigger than any of his toys (all of them oddly-shaped, with
knots and ridges and bumps, as inhuman as can be). It's wet, too, Dick's excess
saliva dripping down between his legs. After a while, Jason feels like his
whole lower body is soaked, and he trembles like he's just been dunked in
freezing water. He thinks he might lose his mind from how good it feels, but
then Dick starts to press the appendage in, and Jason can hardly stand it.
He gasps and pants and cries out words that Bruce would turn him over his knee
for saying, sweaty forehead pressed against the cool wall in front of him. The
thinnest part of Dick's tongue, near the tip, fills him up so much that he
feels like he might burst. And then it moves, wiggling like Dick wants to get
deeper, and Jason can hardly hold himself up any more, slumping forward onto
his folded arms. He muffles a whining howl into his gloves, shaking from head
to toe, his precum mixing with the thick spit that drips down between his legs
and over his cock.
Then, as soon as it started, Dick pulls his tongue out, laving his tongue over
Jason's ass a few more times. Jason doesn't know what Dick is getting out of
all this, but he decides that he could come from it, whether or not Dick's able
to get aroused in his current state. He rocks his hips back, babbling
nonsensical pleas into his arms, but then Dick pulls away.
Jason almost sobs, looking back to see what the problem is. Even upside-down
and through teary eyes, he can see something flushed and hot pink standing out
against the pitch black between Dick's legs. He blinks, clearing his vision,
and the shape of it becomes clearer: unlike a human penis, there's no defined
head, and it tapers upward into a rounded point. There are no balls that Jason
can see, but the base of it is engorged and knotted. The whole of it drips with
what he assumes is Dick's precum, thick and clear.
“Oh my god,” he mutters, breathless. “Oh my god. Dick. Oh, god. O-oh g-god—”
His babbling peters out when Dick presses an enormous hand into his back,
pinning his upper body down. Sharp claws slice open his vest, dig into his
skin, and it isn't long before Jason can see blood drip down off his shoulders
to gather in puddles underneath him. It hurts, there's no doubt about it, but
that all pales in comparison to the raw, unbridled desire he feels as Dick
mounts him.
Dick's other hand grips his waist, and for a second, it almost makes him seem
human. But then he tries to shove in and fails, smearing Jason's back with
precum, and he makes a loud, frustrated noise, almost a screech, breaking the
illusion as soon as it appeared. Jason can hear his beak snapping, can feel
drool hit his back in heavy drops, and Dick lines up again, more insistent this
time. Jason shudders at the feel of the tip against his hole, so thick that he
worries it might not be able to fit. But at this point, he couldn't escape if
he tried, and the knowledge of that makes his body throb with need.
Again, Dick tries to fuck into him, and he breaches about half an inch before
his too-slick cock pops out again. The high-pitched noise he makes hurts
Jason's ears, and Dick backs up, angrily sniffing between Jason's legs as if
doing so will net him a clue as to why he can't force himself inside. The next
time he lines himself up, Jason reaches a shaky hand back to hold Dick's shaft
steady. That does the trick, and in one swift motion, Dick sheathes himself all
the way to the top of his knot.
It's big. No — it's fucking enormous. No amount of preparation could've readied
Jason for it, and god, he feels like he's splitting apart. But at the same
time, he's never felt anything more incredible. Dick is smooth and slick and
hot, and he wastes no time thrusting in and out, claws digging into every inch
of skin they can reach. He's big enough that, even with his hips pulled back,
he still manages to stay pressed against Jason's prostate. Jason trembles like
never before, feels like he's being milked with the way his balls throb and cum
steadily drips out of his cock. It's all at once something he never expected
and everything he ever dreamed of, being fucked fast and rough by an actual,
legitimate monster.
Jason's sure he's making his own fair share of noises, moans and screams and
whines, but he's more focused on the inhuman sounds coming from behind him.
Dick switches between high-pitched screeching and lower, growling clicks,
snapping his beak just close enough to Jason's back that he can occasionally
feel him tear off more of his uniform and pinch skin. Occasionally, he can
swear he hears something closer to ragged human breathing, but then it gurgles
out into birdlike noises once more.
Jason doesn't remember the knot until it starts to push into him, at which
point his hips start to buck forward instinctively in an attempt to get away.
Dick grips him even tighter, claws him even deeper, and Jason screws his eyes
shut, allowing himself to howl as Dick pushes the entirety of the bulging knot
in. Dick responds to him in kind, throwing his head back to shriek in an
otherworldy voice.
Dick's hips snap even faster, though of course he can't pull his knot out, so
his shallow thrusts don't go far. Jason feels every motion deep in his gut, to
the point where he thinks he might puke, but, god, his cock is still leaking,
practically aching at this point, and as tears stream down his cheeks, he can't
help but think that he never wants this to end. It feels good to be helpless,
to be a hole, to be wanted so badly by something not even the same species as
him (something that, underneath it all, is his brother).
Dick's motions become more urgent, and he drags his claws down Jason's sides,
leaving swathes of leaking red in his wake. At the same time, Jason feels his
stomach start to swell with liquid, hot and thick and far too much. Hastily, he
undoes his utility belt and tears the buttons of his vest open in a desperate
attempt to feel less like an over-inflated balloon. It just keeps coming, and
surely he really will burst this time, but Dick doesn't let up, knot still
swollen as ever. Jason looks down to see his stomach bulge, wonders how the
hell he'll hide his state from Bruce and Alfred, but those are the last
coherent thoughts he's afforded before the depravity of it all sends his mind
reeling. He comes and he comes and he comes, with Dick shrieking behind him and
his own desperate moaning echoing loud in his ears.
===============================================================================
 
When he comes to, he's lying in a puddle of blood and cum, and Dick is curled
up fast asleep in the opposite corner of the enclosure. Most of Dick's cum has
made its way out by now, but the viscous stuff sticks to him like half-dried
glue. Jason can feel a bit of it press against the inside of his belly, and
figures he must be really messed up to enjoy the feeling as much as he does.
Most of the clean-up is a blur. He's not stupid, of course, so he came
prepared. He showers in the corner (this cell was built with human quarantine
in mind, after all), then mops the floor up on shaking legs. Most of his wounds
have coagulated by now, but he stems the bleeding of the last few and stitches
them up himself with the first aid kid he's glad he thought to bring. And he
has another uniform at the ready, naturally, though in retrospect, he wishes
he'd have brought something softer and more casual to wear, the rough fabric
brushing up against his injuries.
He tries not to think too hard about what he's done. The cleaning helps with
that for a while. But before he goes, he glances back at Dick, still fast
asleep, wings occasionally twitching, and wonders: what if he remembers all
this once he changes back? That's the one variable he's always known he isn't
able to control. Dick may not have been in his right mind during the act, but
if he remembers afterward...
Jason presses a hand absently to his stomach and resolves to cross that bridge
when he comes to it.
 
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