Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2310296.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Merlin_(TV)
  Relationship:
      Merlin/Arthur_Pendragon
  Additional Tags:
      Underage_Sex, Extremely_Underage, Age_Difference, Nipple_Play, Multiple
      Orgasms, Emotional_Manipulation, Dubious_Consent, Possessive_Behavior,
      Alternate_Universe_-_Modern_Setting, based_in_the_US, Shota, wee!Merlin,
      teenage!arthur
  Series:
      Part 2 of The_Tree_House
  Stats:
      Published: 2014-09-15 Words: 3299
****** Perks ******
by izzygone
Summary
     Merlin was too trusting.
     Arthur knew that was because he was 11 and too innocent to understand
     how the world really worked, but jesus, there had to be limits.
     But clearly there weren’t because he had Merlin shirtless and
     writhing underneath him as he applied suction to the younger boy’s
     pert and sensitive nipples.
Notes
     Originally written for my September 2014 prompt-a-thon for the
     prompt: Shota!Merlin + nipple play. Inspired by this (NSFW) image.
     IMPORTANT WARNINGS: Merlin in 11 in this story, Arthur is 15.
     Warnings for dub con because underage = cannot consent. Also Arthur
     is still a manipulative mofo in this.
Merlin was too trusting.

Arthur knew that was because he was 11 and too innocent to understand how the
world really worked, but jesus, there had to be limits.

But clearly there weren’t because he had Merlin shirtless and writhing
underneath him as he applied suction to the younger boy’s pert and sensitive
nipples. He’d purchased the devices, aptly named “nipple_suckers” online using
his father’s business credit card. It was a risk, and he’d spent the past 2
weeks stalking the mailman, ready to intercept the package lest some
unsuspecting member of his family catch on to his plan. A risk, yes, but
clearly worth it.

“Stop fidgeting,” Arthur admonished, his voice exasperated and just slightly
higher pitched so he was afraid it might crack and ruin his carefully
calculated mask of passivity, “You’ll ruin everything.”

Merlin stilled momentarily, huffing and trying to control himself, but the
pressure on his nipples was intense and increasing with every second, “Ican’t,”
He sobbed, “It’s too much.” He could feel tears brimming.

“Don’t be such ababy, Merlin, I’m nearly done.” And he was, one more twist and
he was sure Merlin’s chest had never looked so appealing, his nipples never so
red and enlarged. Fucking perfect. “Okay, okay,” He leaned back, admiring his
handiwork, “It’s done.” He was still straddling Merlin, and he wanted nothing
more than to buck forward, rub himself off hot and fast while Merlin struggled
and shifted from the sensation of the tight, hot suction on his nipples. He
held off, though, because he wasn’t sure how he would explain that to Merlin.
Instead, he swung his leg over, moving off the younger boy. “Now put this on.”
He grabbed his sweatshirt and held it out to Merlin who sat up, squeaking as
the suction cups shifted.

Tentatively, Merlin took the sweatshirt from Arthur’s hands, inspecting it. It
was red and gold -- the high school’s team colors-- and had the name PENDRAGON
across the back in big white block letters. It was at least 3 sizes too big for
him, built for a broad-shouldered soccer-playing teenager, not a scrawny 11
year old boy. He shrugged it on anyway, though, gasping as the fabric slid over
the suction cup devices adhered to his chest. The sweatshirt was indeed too big
for him, but it covered the nipple devices so well, no one could have guessed
he was wearing them.

Arthur smirked; he’d never seen something so beautiful. The only way to make
this picture better was to transfer the name from the back of the sweatshirt
directly onto Merlin’s skin. Arthur wondered how difficult it might be to
procure a tattoo machine. He shook his head. That would have to wait, “Well get
up.” He watched Merlin struggle to his feet, a little dazed from lack of air
from when he stopped breathing as Arthur ratcheted up the nipple pumps, “Now go
finish your homework. And don’t touch those,” He indicated the hidden treasures
on Merlin’s chest, “Or that.” He indicated lower, at the tiny cock hidden
beneath the hem of the extra long sweatshirt.

Merlin was bright red and he nodded, still quite dazed. He went deftly and
unraveled the knot tying closed the trap door out of the tree house, not quite
feeling it and going strictly on instinct. “Hey,” Arthur said as Merlin placed
his first foot on the ladder below, half in and half out of the tree house, and
Merlin looked up, “Do you love me?”

If possible, Merlin turned even redder, “More than anything.”

Arthur smiled wider and Merlin felt shy and confused, so he hurried down the
rest of the ladder and across the Pendragon lawn where Morgana was sunning
herself and eyeing him suspiciously. He ignored her and a hot sensation that
spread through him at the idea that she had no idea what was going on under her
brother’s sweatshirt.

His own house was quiet, for which he was thankful because he didn’t know how
to explain to his mother that he was wearing Arthur Pendragon’s soccer hoodie
to hide suction cups on his nipples… which Arthur had given him as treatment
for an illness he wasn’t entirely sure wasn’t made up. But then again, the
whole doctor game was made up, and if this was how Arthur wanted to play it…
well, it wasn’t like it was all bad or unpleasant, anyway.

Merlin got out his backpack from under his bed and took out his math book and a
sheet of paper. He laid everything out at his desk and sat down, trying to
ignore the hot tightness on his chest. It felt miserable and unfulfilling when
he moved, the tiny suction cups swinging just a little with the movements,
rubbing against the fabric of the sweatshirt. There was so much pressure in his
body, he felt like he might explode but for some reason no amount of fidgeting
relieved the pressure. Somehow sitting still made it even worse.

He had to be careful, too, not to lean forward or he risked brushing the
contraptions against the hard surface of the desk and that, that was by far the
worst. Or the best. It was hard to tell.

It was a bit difficult, too, to concentrate on the math problems. The
instructions in the book said not to use a calculator, and normally Merlin
never would (he didn’t approve of cheating), but Arthur wouldn’t remove the
suction cups if Merlin didn’t finish the homework, and Merlin would never
finish the homework while wearing them… In the end, he picked up the
calculator. He’d go back later and double check the answers by hand.

---
As soon as Merlin’s head disappeared down the ladder, Arthur started touching
himself. He didn’t feel bad about it, really, afterall he’d done far worse
stuff in the tree house. Plus, he knew if he didn’t come soon, he’d probably
explode the second Merlin pulled the sweatshirt off and he saw those puffy
little nipples again. He stroked his cock first slowly through his shorts, not
wanting to chafe himself like he’s done many times before being overwhelmed by
imaging Merlin touching him. He tried not to rut so desperately against his
hand, tried not to imagine what it might feel like to rub his erection up
against Merlin’s soft bare skin, his small, hairless cock, only just developing
the ability to become erect. Fuck.

Arthur was hot now so he threw off his shirt and pushed his shorts down. His
hand was hot and a little sweaty and the slick eased the friction just a little
as he palmed himself a little harder, a little faster. His hand felt good,
smooth and moist compared to the rough metal and fabric of his jeans when he
rubbed off against Merlin, but it really wasn’t the same. Merlin was better,
was probably always going to be better. It might have bothered him that he was
probably having the best sex of his life at the age of 15 and that literally
nothing could get better than this, but he was too preoccupied to really think
about it. Eventually, Merlin was probably going to figure out that what they
were doing was totally-fucked-up-wrong and he might eventually hate Arthur for
that, so Arthur figured he probably ought to take advantage while he had it.

The fact that Merlindidn’t understand yet how seriously deranged and off Arthur
was just made him get off faster. He imagined Merlin’s sweet, innocent face.
His adoration and pliability under Arthur’s fingers, the simple joy he got from
making Arthur happy… it was all over for Arthur, really. Arthur was probably
ruining Merlin’s childhood, but Merlin was ruining Arthur for life. It was
pretty fucking unfair, in Arthur’s opinion, and he felt a bit like punishing
Merlin for it, for destroying his fucking life without even knowing it. The
idea got Arthur even hotter, and he rutted up into the tight grip of his hand.
He thought of what it’d be like to really punish Merlin, bend him over his knee
and smack his naked bottom so his little cock rubbed up against Arthur’s skin
until it got confusedly hard despite pain and then maybe Arthur would press a
finger against Merlin’s tight, virgin hole and make Merlin come like that, ass
red and hot and hurt and cock full and raw against warm skin. And maybe Merlin
would never forget that -- would always need a finger on his hole to get off,
always need a little bit of pain. Ah, fuck. Arthur spilled all over his hand,
quickly covering his mouth with his other hand to muffle his sharp yelp,
hopefully quick enough so as not to attract the attention of his poor sister in
the yard below.
---

Before Arthur even had time to pull his own shirt back on, he heard the creek
of the trap door and he turned around, a little panicked at the idea that he
had forgotten to tie down the door and anyone could be coming up the ladder -
- but it was just Merlin, cautiously lifting the trap and sticking his head
through.

He was biting his lip as he asked, “Can I come back up now?”

Arthur frowned down at him, “You couldn’t possibly have finished all your
homework this quickly, Merlin.”

“I did! I mean, there wasn’t that much. Just math.” He looked up at Arthur,
face still flushed, reminding Arthur just how swollen his little nipples must
be. He was giving his best pout, too, and Arthur was only human.

“Hmmm…. well, as long as you finished all of it…” Arthur narrowed his eyes on
him and Merlin nodded his head rapidly, “You may come up.” Merlin scrambled to
get in, bumping his chest hard against the entrance and groaning. And that was
all it took for Arthur to get hard again. Being a teenage boy had its uses.

It seemed to take Merlin ages to pull himself all the way up and into the
treehouse, and even longer for him to retie the door closed.

He was exhausted from the effort, it seemed, and he flattened himself back down
where Arthur had pinned him earlier to attach the suction cups. He panted a
little and looked up at Arthur for a minute before cocking his head, “Where’d
your shirt go?”

Arthur almost laughed, but instead replied a little coldly, “I was checking
myself in case your nipple disease is catching,” he slumped ungracefully
against the wall and nudged Merlin playfully with his foot.

Merlin frowned. He usually got to check Arthur for sicknesses. He knew it was
silly and that it was all just a game, but some small part of him still worried
that Arthur would stop needing him. When they were younger, Arthur used to
always say how lame he was for being so young and so small, and even though
Merlin had grown up quite a bit by now, Arthur still managed to make him feel
that way sometimes.

“Well?” Arthur nudged him again, “Let’s see them then.”

Merlin sat back up in a hurry. He was a little scared of taking the sweatshirt
off-- he thought he might pull the contraptions off, too, and then Arthur would
really be mad. Carefully, he snaked his hands back up the sleeves then down the
body of the sweatshirt, grabbing it from underneath, carefully lifting it so it
didn’t touch the suction cups as he tugged it off.

It felt cold in the tree house without the sweatshirt, and Merlin might have
shivered a little if he hadn’t felt Arthur’s hot touch almost immediately on
his chest, pressing him back down to a lying position and crawling over to
straddle him in a single motion.

Arthur cursed quietly. Fucking fuck, was this real life? This was, if possible,
better than he remembered. Merlin’s nipples were red and puffy inside their
tiny plastic chambers. The area around each of them was swollen and pink and
Arthur couldn’t stop himself from flicking his fingers in a semicircle around
each. His throat was dry and he felt a little dizzy. He was pretty sure he’d
never been so fucking hard.

“Do they…” he swallow, “Do they hurt?”

Merlin seemed stunned into silence, but he shook his head.

“How does it feel? Tell me.”

Merlin never disobeyed a direct order, so he found his voice and said, “I don’t
know… funny, but not bad. Hot, mostly. And like… needy, I guess.” He covered
his face which had turned red.

Arthur swallowed again, “I’m going to take them off you, okay? I’m going to
make you feel better, okay?” Merlin nodded behind his hands but didn’t meet
Arthur’s eyes.

Arthur couldn’t stop himself from letting his fingers linger. He flicked each
nipple, watching the contraptions bob and felt Merlin gasp and squirm
involuntarily underneath him. He scooted himself up, pressing down on Merlin’s
hips with his thighs and feeling Merlin’s hard little cock hidden under his
clothes. He sighed. Fucking beautiful.

With shaky hands, Arthur held the left nipple sucker and pressed lightly on
Merlin’s areola, breaking the seal with a little “pop” as Merlin let out a
little yelp. Embarrassed, the younger boy clapped his hands over his mouth.
Arthur looked down sternly, “Merlin. We can’t play the game if you’re not going
to behave.” Merlin gulped and pressed his hand more firmly over his mouth as
Arthur pulled back taking the first nipple device with him and setting it on
the floor next to them. “Can you be quiet for this next one?” Merlin nodded
vigorously and kept his mouth covered.

As if possessed, Arthur couldn’t prevent himself from tugging gently on the
remaining suction cup. Merlin hissed and bucked up suddenly. Arthur raised an
eyebrow, “Like that, do you?”

Merlin shook his head. Then, as Arthur flicked his thumb over the first exposed
nipple, Merlin seemed to change his mind and suddenly nodded. Arthur couldn’t
help but tease a little longer, rotating the remaining sucker in a small circle
while Merlin bit into his own hand. Finally, he used both hands to break the
seal and release the second nipple from its prison. In his defense, Merlin only
squeaked this time, face still hidden, fingers pressed into his mouth, but
Arthur glared at him anyway, trying to put on his best disappointed face.
Merlin hid his eyes behind the spread fingers of his left hand, looking
sheepish.

Arthur decided to forgive him just this once. “How does it feel? Better?”
Merlin shook his head, “Worse?” Merlin paused, then nodded. “What if I do
this?” He flicked his fingers over the newly exposed nubs. Both of Merlin’s
nipples were raised, pointed and red. Arthur wanted to fucking bite them.
Merlin didn’t think this time, he just moaned, his hips bucking against
Arthur’s immobile ones and his back arching. “What was that, Merlin? I didn’t
hear you,” Arthur teased and took that moment to twist the engorged nipples
between his fingertips. Merlin bucked up twice in rapid succession whilst
simultaneously failing to hold in a deep moan.

Arthur continued to roll the pointed nipples between his thumb and pointer
fingers, one nip in each hand, watching them grow and turn even redder until
Merlin whispered breathily, “Fuck, Arthur.”

Arthur stopped and stared down at the younger boy below him. He was sure he’d
never heard Merlin swear in his whole life. Arthur might have admonished him
for cursing if it hadn’t been the hottest thing that had happened in his whole
life ever. He couldn’t hold himself back any longer after that, and he leaned
down to flick his tongue lightly over Merlin’s swollen left nipple. Merlin’s
full bodied moan was enough to encourage him and he continued, engulfing the
red point in his mouth and giving a gente suck. Merlin bucked up so hard
against him that Arthur leaned back, lifting his lips from the buffet before
him.

“Merlin, you have to stay still or the treatment won’t work.”

Merlin nodded seriously, and Arthur returned to his task, taking the right
nipple into his mouth this time and sucking far less gently. It was inflamed
and raised, at least twice if not three times larger than it had any right to
be and probably just as sensitive because Merlin pressed his hands harder
against his mouth and arched as if chasing more of Arthur’s mouth. With his
free hand, Arthur pressed on Merlin’s rib cage, holding him him flat against
the floor and preventing him struggling.

Merlin’s nipples were fuckingsweet, the taste of them intense and perfect under
Arthur’s tongue. He couldn’t really help himself, despite knowing how
oversensitive Merlin was, Arthur still bit down. It was a love nibble really,
but Merlin bucked up hard and fast, his hands suddenly finding Arthur’s hips
and gripping tight enough to leave bruises.

Arthur was only a man.

He started bucking back against the younger boy below him, their hard cocks
rubbing each other through the fabric of their shorts. Arthur had the presence
of mind to scold Merlin, “You’re never going to get better if you don’t stay
still.”

Merlin just groaned and jerked up hard against him, one hand coming to rest on
the back of Arthur head, forcing him back to sucking hard at the nipple before
him, “Jesus fucking fuck,” he tried to murmur, but it probably came out more
like “hhhnngg.”

Merlin was hot and perfect on the worst of days, but today he was like a
fucking supervolcano because he wasn’t just Merlin, sweet-desperate-to-please
kid from next door, he was a deadly fucking siren and Arthur was happy to crash
upon those rocks.

In fact, Arthur realized, he wasminutes if not seconds away from crashing. He
was dazed and sweaty and blissed the fuck out from the absolute hotness that
was a wanton and shameless Merlin, wiggling and straining below him.

And Merlin kept fucking grunting, “Arthur, Arthur,Arthur,” in this little
rhythm that corresponded with his hips rolling up and up.

Arthur tried valiantly, he honestly did. He was bigger and stronger and he
tried to pin Merlin down, but Merlin was possessed and he moaned and panted and
Arthur was only fucking human goddamnit. He sucked harder on Merlin’s right
nipple and squeezed and rolled the left in his free hand, and Merlin wouldn’t
fucking shut up.

Arthur came hard and fast in an embarrassingly short period of time,
considering that he’d come like 2 minutes before they started this, but Merlin
came even faster. Somewhere between the first touch of Arthur’s lips to
Merlin’s nipples and the last twist he gave in his exhausted state, Merlin came
at least twice, and Arthur could feel it wet and hot, seeping through Merlin’s
shorts.

After a few minutes spent crushing the air out of Merlin below him, Arthur
finally leaned back, steeling his face into a frown.

Merlin was breathing hard, confused and still hot. Arthur could feel the
younger boy’s dick start to harden again against the warmth of his leg.

“Merlin,” Arthur breathed, a little higher pitched than he meant, “What’s wrong
with you?” He frowned harder for emphasis.

Merlin’s hands fled Arthur’s hips as if on fire, covering his face again. He
shook his head, “I… I don’t know!” He was embarrassed and confused, and it
could not have been sexier.

Arthur slid his body down so he was straddling Merlin’s knees instead and he
leaned down, examining the wet spot on the other boy’s shorts which were tented
just slightly, “I think you’re sick.” He rubbed his palm over the spot and
Merlin bucked then started to squirm, “I think maybe… you’re going to need a
lot more treatment.”
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