Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8293156.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Hunter_X_Hunter
  Relationship:
      Illumi_Zoldyck/Killua_Zoldyck
  Character:
      Illumi_Zoldyck, Killua_Zoldyck, Milluki_Zoldyck, Kalluto_Zoldyck
  Additional Tags:
      Mildly_Dubious_Consent, Sibling_Incest
  Stats:
      Published: 2016-10-16 Words: 1599
****** by omission ******
by statuscrows
Summary
     Gossip spreads fast in the Zoldyck family.
Notes
See the end of the work for notes
“Ha! I bet the piggy hasn’t even kissed anyone yet!” Killua says, loudly enough
that Illumi catches the mocking tone of his voice from down the hallway. He
stops curiously, sensing two other familiar presences in the room. He’s pretty
sure the conversation is coming from one of the spare rooms that Milluki uses
to store his old laserdiscs, which would also explain Killua’s teasing and one
of the presence but he isn’t certain of the other yet.
“Yes I have!” Milluki says.
“Yeah? Who then? One of the butlers?”
“Maybe!”
“As if. They’re all too professional to kiss you. And everyone knows you don’t
leave the house.”  Killua laughs. “Kisses from Mom don’t count.”
“What the hell do you know? You’re just a brat!”
“At least this brat has kissed someone.”
Illumi tilts head. Since when did Killua start lying?
“No way!” Milluki says. “There’s no way you’vekissed anyone, you’re terrible
with girls.”
“Am not,” Killua says. “Girls like me better than they like you anyway.”
“Who did you kiss then?”
“That’s none of your business fatso. You don't know them. "
“I bet I know who it was,” the third voice, Kalluto, says.
“Hey Kalluto don’t - “
“Huh?” Milluki says. “Who was it then?”
“Gon right?”
Illumi hears Killua stutter a little but the room stays mostly quiet. He clears
his throat. “So what if it was?” 
“What you kissed a guy?” Milluki says. “I’d rather stay a virgin.”
“A loss to the world, truly,” Kalluto says. Killua laughs and the conversation
tapers off until Milluki starts yet another round of questions about the
mechanics of Greed Island.
*** 
 
Though Killua’s new found interest in lying to his family is worth mulling over
Illumi isn’t particularly bothered by the conversation he overheard. Most of
Milluki and Killua’s interactions over the years have either been violent or
involved one of them relentlessly teasing the other, so he can’t say this new
turn is all that out of character for them. Kalluto immediately assuming that
Killua’s made up relationship was with his little friend was a bit more
alarming as he generally had good instincts when it came to other people’s
interactions. If Kalluto thought they were kissing in the downtime between
their silly adventures it was possible things might actually lead in that
direction in the near future.
They hadn't lead there yet of course. Illumi would know.
In the end Illumi decides that he’ll speak to Killua before he leaves for his
next job, maybe by politely reminding him how beneath them his friend is, and
that he’ll probably have a spouse arranged for him by the family down the road.
In the meantime he has dinner with his brothers, enjoying the rare chance at
company with just the four of them since their parents are on a job. Milluki
and Killua are still arguing about game mechanics while Kalluto quietly ignores
them and eats. Illumi stares directly at Killua for the entirety of the meal
but that’s not unusual for him so no one bothers to comment on it. Not that
they ever would.
The matter of whether or not Killua has been kissing anyone would have probably
dropped eventually if he didn’t frequently listen in on his siblings
conversations and catch something much more worrying the next day.
*** 
 
“You’re lying!” Milluki shouts, “You’re a goddamn liar!”
“What, is the piggy jealous?” Killua says. “Just because you’re a 20 year
virgin with an anime wife doesn’t mean that I plan to be.”
"No way is a 14 year old getting more action than me," Milluki says.
“You’ve actually had sex?” Kalluto asks, voice a little disbelieving.
“Don’t believe me?”
“Sex with Gon?”
At this Killua seems to falter a little. “I’m not gonna kiss and tell. But it
happened.”
After that the conversation continues on in much the same way for about a half
hour with most of the exchange being either Milluki shouting or Killua saying
something incendiary and sarcastic. Illumi stays outside the door, pacing
occasionally as he thinks through everything he’s heard.
 ***
 
He catches up with Killua several hours later when he finally leaves Milluki
and Kalluto alone for the first time to go to the bathroom. When Killua moves
to swing the door shut, whistling slightly, Illumi is there, standing still off
to his side. Killua jumps back when he notices his presence, claws out.
“Illumi?” he says, panic fading slightly. His hands return to normal. “I didn’t
know you were - I’ll go use a different bathroom.”
“No Killu, you can stay. I’m just here to talk to you.”
Killua swallows. “Okay.”
“Is what you said true?”
“Is what true?”
Illumi takes a few steps forward and Killua takes several backwards, eyes
trained on the floor. The bathroom is small enough that his back hits the sink
almost instantly. “What you said about having sex with Gon.”
Killua looks so guilty that Illumi’s almost tempted to take pity on him.  But
with something so serious compromise isn't really an option. “I - I didn’t...”
Killua’s voice trails off.
“You didn’t what? You didn’t say you were having sex with Gon or you haven’t
been having sex at all?”
“I - “
“Because I have to say it really surprised me Killu; hearing my little brother
say those kind of things,” Illumi says, lowering his voice slightly. He reaches
out to roughly grip the waistband of Killua’s shorts and he jumps.
"Why should it matter to you?" Killua says quietly and Illumi laughs.
"What a mean thing to say. Everything you do matters to me. " Illumi tugs at
his shorts playfully. "We're family after all."
Killua closes his eyes, body trembling faintly.
“What is it?" Illumi asks. "These kind of things shouldn’t matter to someone
who’s already having sex should they? Something as small as this.” Illumi
releases his shorts to find the shape of Killua’s cock under the fabric and
grind into it with the heel of hand. Killua lets out a small whimper and then
slaps a hand over his mouth.
Illumi takes a hold of his wrist and pulls his hand away from his mouth. “Ah,
that’s right you’ve been kissing people too haven’t you? So if I were to kiss
you right now it wouldn’t be your first kiss or anything, would it?”
“I-Illumi I don’t - nn!”Killua makes another soft sound when Illumi switches to
stroking his now hardening cock through his clothes.
“Hm? You don’t what Killu?” Illumi lowers his face so that his nose brushes
Killua’s, his lips hovering closely over his. "You've "been there and done
that" haven't you?" Illumi says, quoting Killua's own words earlier. He moves
slowly, lets Killua watch as he goes for a kiss -
“I was lying!” Killua shouts. His eyes are squeezed shut and he’s turned away
from Illumi. “I was lying to Milluki! I - I just wanted to make him mad. Gon
doesn’t even like me like that, it was all lies!”
Illumi smiles and, very slowly, lets go.
"I know," he says. "But you shouldn't say stuff like that. You're too young to
have a bad reputation."
He takes a step back, ready to leave with his point proven but Killua makes a
small sound of surprise.
"Yes?" Illumi asks, looking at Killua again. His eyes are finally open but he
isn't meeting Illumi's stare and he's fidgeting a little on his feet. He waits
patiently, wondering if Killua will actually say anything but Killua shakes his
head.
Illumi sighs. He can be so stubborn sometimes.
"If you insist," Illumi says.  He yanks down Killua’s shorts and then takes his
cock properly in his hand with one swift movement. "But no more lying."
With a soft gasp Killua lets his head fall against Illumi's chest. "I - I
won't. I promise." He's warm and has one hand curled tightly in Illumi's shirt
like he thinks if he let's go Illumi will stop touching him. He give Killua's
head a reassuring pat and jerks him a little faster.
“You know I only want what's best for you, right?" He asks.
Killua nods, his cock leaking slowly over Illumi’s hand as he thumbs the head.
With some satisfaction Illumi notes that it's taking very little to get him
off.
“That’s good,” Illumi says with a smile. “Then I want you to come, right now
while I’m touching you and then I want to you to clean up and go apologize to
Milluki for lying to him. Can you do that?”
Killua whines quietly, but nods again.
“Okay,” Illumi says, giving his cock a final squeeze. “Come then.”
He snaps the door off the sink’s cabinet while he does it, but, ever the good
little brother, Killua comes in Illumi’s hand.
“There we go,” Illumi says. He pulls Killua’s short back up with a snap. “All
better.” Killua lifts his head and stares down at his feet, breathing heavily.
Gently, Illumi tilts his face up so that Killua is finally looking at him and
then leans to give him the quickest of kisses on his lips before moving to
washing his hands.
After a few moments of quiet Killua finally says, “...do I still have to
apologize to Milluki?”
“Why wouldn’t you?”
“You know...” Killua’s voice goes a little softer. “Because it’s not really...a
lie anymore.”
Illumi shuts off the water. “Oh,” he says, touching his chin. “Shoot, I guess
you’re right." Killua laughs with nervous relief. "Just tell him I jerked you
off and kissed you then and it shouldn't be a problem.”
Killua goes pale. “Never mind," he says quickly. "I’ll just go apologize.”
End Notes
     Recommending your blog to people with your fics is the hip thing to
     do these days right? Maybe? Well I'm @statuscrows on tumblr if you
     feel like talking illukillu or stabbing me with a pitchfork or
     something idk
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