
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/1175127.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      Multi
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski, Derek_Hale/Stuart_Stilinski, Stiles
      Stilinski/Stuart_Stilinski
  Character:
      Derek_Hale, Stiles_Stilinski, Stuart_Stilinski
  Additional Tags:
      Girl!Stiles, Orgy, Underage_Sex, Incest, Threesome, Unsafe_Sex, Badwrong
  Stats:
      Published: 2014-02-09 Words: 1327
****** Twins and the Pack ******
by peacensafety
Summary
     Derek likes Stuart and Stiles, even if they are the most frustrating
     people in his pack. He isn't sure how to handle them jealous of each
     other, and one night when he goes to talk to them about it he walks
     in on something surprising.
Notes
     This is badwrong. If you are easily offended, don't read this. If
     you're bothered by incest, don't read this. If you're bothered by
     seventeen year old twins having sex with a twenty-three year old,
     don't read this. I think this pretty much covers every warning in the
     story, but if I've missed one please don't hesitate to point out a
     tag you think I should add. I don't want to bother or shock anyone.
Stiles and Stuart are probably the bane of Derek’s existence. The twins are
best friends with Scott McCall, who has warned him repeatedly that they tend to
get a little weird whenever someone new is introduced to their circle. Stuart
doesn’t let anyone near his twin sister, and Derek does not have to be a
werewolf to see the tension radiating up Stiles’s back whenever anyone gets
near Stuart.
They work though, as a pack. Derek smiles when Lydia, Allison, Erica, and Kira
finally separate Stiles from her brother long enough to take her shopping. The
end result has Stiles blushing and unable to meet anyone else’s eyes afterwards
except for Stuart’s and Derek’s own. Derek is a little surprised by the blush
that deepens her skin color, muting out most of her moles, and the almost
embarrassed look that she gives to Stuart who looks pissed as hell about Stiles
checking Derek out.
It isn’t like the twins aren’t the most attractive people in the whole pack, if
anyone bothered to ask Derek. Derek has problems taking his eyes off of either
of them, bent over books as they whisper to each other in twinspeak that they
had made up as babies. Scott swears that it’s a real language, Lydia reminds
him that the two refused to speak anything else for two months after their
mother died, but they refuse to teach it to anyone else. After the shopping
trip though, Stuart starts speaking in the language more often around the pack,
and it seems like he and Stiles are arguing when they’re using it.
Derek decides that he should probably explain to Stuart that he isn’t
interested in Stiles that way, even though it will mostly be a lie. Derek is
interested in both of the Stilinski twins, but they’re both underage and Derek
wouldn’t feel right just dating one of them. He gets ready to climb into
Stuart’s bedroom window one night before he glances in, and he freezes at what
he sees.
Stuart is obviously having sex with someone on his narrow bed. His naked back
gleams from the desk light, highlighting the beauty marks up and down his pale
skin, as his narrow ass pounds into whoever’s long, incredibly sexy legs are
wrapped around his waist. Stuart is holding her arms above her head, and Derek
takes in the side view of one surprisingly large bouncing breast before he
realizes that Stuart is fucking into his sister.
Derek is mesmerized. He can’t stop watching the twins, can’t help but admire
Stiles’s back when she arches as Stuart makes her come, and he completely
misses the evil smile that Stuart gives him before he rearranges Stiles on her
knees, pulling her back onto him and lifting her body so that her head rests
back on his shoulder. He cups Stiles’s breasts like offerings, lifting them up
and brushing her nipples with his thumbs, and then one of his hands slides down
her flat stomach and his long fingers spread her labia, exposing her hard clit,
and he takes his long middle finger and slides down the little nub of flesh
before turning his hand over and beckoning at Derek to join them.
Stiles doesn’t even know that Derek is there when he silently slides the window
open, silently climbs in and doesn’t drop eye contact with Stuart. He gets on
the bed, Stiles not even knowing that he’s there, and with a broad sweep of his
tongue licks her straight up her slit.
Stiles gasps, her light brown eyes flying down to meet his, and she is still
too turned on to say a word. A high pitched moan slips out her mouth and Derek
sucks on her clit lightly before licking down again, catching the edge of her
vagina just as Stuart’s dick slides into it one more time.
Stiles spreads her legs, her hands grasping at Derek’s hair as he eats her out
and licks around Stuart’s dick, sliding in and out of her. Derek can’t get
enough of their combined taste, and he reaches around to palm Stuart’s ass,
giving into touching what he’s wanted to touch for such a long time, reaching
up with his other hand to cup the breast that Stuart left naked with his own
hand.
“Naked,” Stiles begs, “Need you naked, too,” she whines.
Derek stops long enough to rip his Henley over his head and push his jeans down
his legs. Stuart pauses long enough to slip out of Stiles, push Derek down on
the bed and arranges his sister over Derek’s face so that she’s straddling his
shoulders. He sucks on Derek’s cock while Derek is eating out his sister, her
sighs and moans getting louder when Derek growls as he feels Stuart’s mouth
sliding up and down his cock.
It takes Derek by surprise when Stuart lowers himself down on Derek’s cock,
riding him a few times before he takes his sister again, laying her down on her
back on top of Derek. Derek’s hands reach for her breasts, he knows how
sensitive her nipples are now, and he moans when Stuart pulls her hips down to
sheathe himself back in her pussy. Derek fucks up into Stuart and holds onto
Stiles’s narrow little hips, shoving her down on her brother’s cock, and he
can’t think about how wrong this actually is because he’s too turned on.
Stiles stretches back, kisses Derek’s mouth where it’s messy with her juices,
her little tongue darting in to taste herself on him.
“So fucking hot,” Stuart moans, grinding against Derek’s cock and his sister’s
clit. He leans down and Derek moans when he kisses his sister, pulls her mouth
to his throat while he kisses Derek.
“God, I’m gonna come,” Stuart moans, “Fuck me harder, Derek. Let Stiles feel
how hard you’re fucking me.”
Derek grabs Stuart’s hips, holds him down while his own drive his cock into
Stuart’s tight hole. Stuart’s so tight already, and Derek thinks his might be
the first cock he’s ever had up there, and that thought and the slight weight
of Stiles on his chest, her heels digging into the mattress as she cocks her
hips up as she gives Stuart something tight and warm to drive into, Stuart’s
hands on his sister’s breasts, and then he gets tighter.
Stiles isn’t done after Stuart’s come in her, and Stuart pulls off of Derek,
removes the condom that Derek had no idea he’d even put on him, and pushes his
sister onto Derek’s cock, sliding in where Stuart’s come makes her even more
slick. “Finish her off for me?” Stuart smiles at Derek.
Derek pushes Stiles up so that she’s straddling him in reverse, pulls Stuart
close to him to kiss him a little before getting on his knees so that he can
pound into Stiles harder, his dick sliding through Stuart’s come. She leans
over, her curvy little ass straight up in the air and her breasts smashed
against Stuart’s bed, and Derek drives into her until her moans become pleas
for him to come.
When he reaches his release, his come mixing with Stuart’s, he pulls out and
licks her so that he can taste all three of them together. Her body jerks with
aftershocks, her pussy red and swollen as it had been used so well by Derek and
her brother.
“I told you,” Stiles laughed at Stuart. “I told you we could both have him. We
share everything, Stuart, and Derek understands that.”
Both of the Stilinski twins curl up around Derek, smiling at each other and
kissing each other’s faces a few times.
“We’re going to have to shower,” Derek says, because he doesn’t know what else
to say.
“We will,” Stuart said. “And maybe tomorrow night you and I can both take
Stiles.”
“Mmm,” Stiles stretches against Derek a little, and he likes how her hard
little nipples scratch against his skin, “my boys.”
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