Note: This story was dynamically reformatted for online reading convenience.
 
 Rating: NC-17 with M/F/F
Disclaimer: I have zero rights to the Firefly series or any characters
mentioned within..
Feedback: It is always appreciated at archer15152000@yahoo.com
Storyarc: Occurs at the end of the movie Serenity where River pokes her
head in on Simon and Kaylee.
Firefly: Through the Vents

   by Archer

   'Wheee' River thought with a smile on her face as she slid down one of
the many vent shafts running through Serenity.  'You have so many fun
places in you Serenity.'

   "There is more fun up ahead," River heard in her head.  "Of a different
variety."

   "Okay!" River said back as she eagerly began to crawl forward, she
pretty much always listened to what the voices said, especially now that
she had them more under control.  'Up ahead, up ahead we go.  Up ahead is
the engine room, maybe Kaylee wants to play a game of some sort.'

   "Something like that," the voice said back with a grin.

   River continued to crawl forward, she could hear sounds up ahead, maybe
they could play hide and seek.  She knew of this place in the bridge where
she could get ...  'Wait, voices don't grin'.

   'Careful, slowly, silently, NINJA TIME!'.  River slowly slid her head
over the opening of the vent so she could peak down inside.  Kaylee and
Simon were pressed up against each other, their lips locked.

   'Wrestling ...  no, no, Kaylee just took Simon down, he wouldn't go down
like that if they were wrestling,' River pondered as the couple she was
watching slid to the ground continuing to explore each other's mouths,
there hands beginning to rove over each other's body.

   'Kaylee and Simon kissing in the engine room KISSI ...  Kaylee and Simon
kissing on the floor KIS ...  Kaylee and Simon kissing on a space ship
traveling through space at full burn on their destination to Whitefall to
pick up some supplies, of which will include illegal cargo, that will then
be shipped back across the galaxy KI ...  hmmm none of those sound quite
right.'

   'They sure aren't wearing very many clothes ...  well it is really hot.'

   Below her Simon and Kaylee continued there aggressive kissing.  Kaylee
had grabbed Simon's hands pulling them to her body.  Finally getting the
hint he began to allow them to explore her body eventually settling on her
large firm tits, squeezing each individually while lightly teasing her
nipples.  Not content to be left out of the exploring game Kaylee reached
her hands down freeing Simon's cock and began to lightly jerk on it.

   'What's she doing with that ...' River wondered as she leaned forward.
As her head passed out of the pipe she was suddenly hit with a sudden
vision being overloaded with images.

   Kaylee sitting in her hammock in the engine room, fucking herself with
her wrench, as she fantasized about Simon laying in the hammock with her
fucking her pussy.  When she finally came she sucked the juices clean from
the wrench handle.

   Simon in his bunk stroking his cock after just passing Kaylee in the
hall and picturing her large tits wrapped around his cock.

   Kaylee spending a day customizing one of her tools to make her own
vibrator, then spending the night playing with it to make sure she had it
tuned just right.

   Simon doing a medical checkup on Kaylee after one of the crews many
battles while his mind was thinking of all the fun things to do if they
were using the tables restraints.

   Kaylee coming to the dinner table and sitting down next to Simon as she
laughed along with all the others, the whole time her vibrator secretly
buried in her pussy.  Her mind not just thinking about Simon, but the whole
crew using her on the table.

   Simon turning down request after request at the whorehouse for a free
ride after delivering the baby.  Every nasty thing they they had whispered
he could do to them he pictured doing with Kaylee ...  and Kaylee and the
whores together sometimes.

   Kaylee up in Inara's room getting her hair cut, wondering if Inara would
trim her pussy ...  as well as other things.

   Simon in their bunk while River slept on the bed, stroking his cock and
fantasizing about the ways he wished needed to be used to cure his sister.

   'Whoa,' ran through River's mind.  She had seen all those images before,
but never all at once.  It had blacked her out for a moment.  When her
vision cleared she realized quite a bit of time must of passed as Simon was
now laying on his back his clothes thrown off as Kaylee took his cock into
her mouth.  It took River another moment to realize that while she was
blacked out she had begun to finger her own pussy.

   River looked down at her brother, the pleasure he was experience evident
across his face.  River felt herself connect with him, she could feel
Kaylee's lips sliding up and down his cock, the tightness of her throat as
she deep throated, and the pleasure as her tongue shot out tickling her
brother's balls.  It was to much for both the siblings, Simon thrusting
upwards and shooting a thick load of cum into the mechanics throat while
his sister's body thrashed in the vent above him.

   When River again came to she was greeted with a new scene.  Kaylee had
taken off her pants leaving her only in her tight see through tank top. 
She was kneeling above Simon's face as the young doctor used his tongue to
work on her pussy.

   'I wonder if she finally asked Inara or if she did it herself'.  Kaylee
had a well trimmed pussy that was much appreciated by Simon and allowed him
to easily get his tongue to all the sensitive areas of her pussy.  River
could feel that was very beneficial because as she felt Kaylee's body she
realized the horny woman had very many sensitive pleasurable areas
throughout her cunt.

   Turning her eyes downward she noticed Simon's cock had rehardened and
was sticking up from his groin.  'It looks lonely ...  I should really help
it out.  But slowly ...  NINJA TIME!'.

   With the skill of an excellent dancer (because she was one) River glided
down out of the vent, moving without noise as she came up behind Simon and
Kaylee.  Kneeling down she grasped her brother's cock and quickly brought
it up to her mouth.

   Simon's body jerked in pleasure, then in shock, when he felt a mouth
wrap around his cock.  However with a tight hold on his hair Kaylee kept
him in place.  Glancing over her shoulder she spotted River looking up at
her with her mischievous eyes.  The depravity of the situation only made
Kaylee hotter and she flashed a smile back her friend.

   Kaylee ground her pussy down across Simon's mouth.  "Shhh ...  it is
nothing to worry about.  Just let whoever it is take care of your cock ...
and make sure you continue to work on my cunt."

   With the soft tongue caressing his hard cock and his mouth full of pussy
Simon gave up any intention of fighting what was going on.

   River took her mouth off of Simon's cock as she grasped it in her hand
jerking it off while she watched the pair.  Kaylee really seemed to be
envying her position and with how Simon was clutching her hips pulling her
towards him it didn't seem like she had any objections either.

   "Kaylee," River said loud enough for her friend, but not her brother to
hear.  "Show him your tits, he really wants that."

   Simon could hear another voice but with his ears partially blocked by
Kaylee's legs he couldn't make out the words or any clue on who it might
be. His thoughts were interrupted though when he noticed Kaylee smiling
down at him before she grabbed her tanktop pulling it over her head
allowing her large breasts to spring free.

   "You like these huh," Kaylee said as she bounced her boobs in her hands.
"Then I bet you will love this."

   Teasingly slow Kaylee hefted her right breast up with her hand as she
lowed her head until she could use her own tongue to flick against her
nipple.  When she repeated the process with her left breast it was too much
for Simon and he exploded, a load of cum that his sister eagerly swallowed.

   "You are in for another surprise Doctor," Kaylee said as she got off his
face.

   Simon opened his mouth in shock as he saw who it was that was cleaning
his cock.  "River ...  what are you doing!!"

   "Shhh," River said as she moved up her brother's body and put a finger
across his lips.  "Quiet now, much fun to be had."

   "River we shouldn't be doing this ..." Simon said continuing to object.

   "Fine, we won't do anything ...  you can just watch as I get Kaylee to
lick out my pussy."

   River got up and took Kaylee's hand as Kaylee whispered to her "I don't
know if I can do that."

   "Sure you can," River said as she pulled off her one piece robe
revealing her lithe naked body to her two lovers.  "I know it has crossed
your mind, and this way it gives Simon something to get him excited and he
can come over and fuck you when he is ready."

   Realizing both points were valid Kaylee seized her arguments, especially
at the thought of finally getting some real cock inside her.

   River sprawled back on Kaylee's hammock spreading her legs.  Kaylee
decided the best approach was probably just to dive in, bending at the
waist she stuck her head between River's thighs as she let her tongue shoot
out getting her first taste of another woman.

   River grabbed her hair pushing her into her pussy, much like Kaylee had
done with Simon only moments before.  She threw her legs over Kaylee's back
holding her even more in position as she raised her hand beckoning her
brother to come over.

   Simon was standing there watching the two girls go at it, the scene
getting his cock hard again faster than he would have ever anticipated
after coming twice.  Kaylee seemed to be getting into it, her lower body
begin to rock back and forth as she drove her tongue in and out of River.
The sight of her ass swaying back and forth and his sister's beckoning call
were enough for him to give his voyeuristic position and move over to join
them.  He positioned his cock at the entrance to her very hot pussy,
teasingly holding it there for a second, before he reached up and grabbed
Kaylee's shoulders pulling her back as he thrust himself forward.

   Kaylee let out an ear piercing scream that would have alerted the whole
ship if it wasn't for the loud noise of the engines muffling it.  Her body
arched in sudden pleasure as her cunt was suddenly filled and then was just
as quickly pulled back down as River grabbed hold of her head bringing her
back to her pussy.  Kaylee suddenly found herself a fuck toy between the
two siblings as Simon tried to pull her back onto his cock and River tried
to get her tongue further into her pussy.

   River locked her legs together behind Kaylee's back as a nasty thought
entered her mind 'Well Kaylee didn't have any problems hiding what was
happening to Simon earlier ...and turnabout is really really hot.' Leaning
forward so only Simon could hear her she said "You should fuck her ass."

   "Really?" Simon said surprised.  "You sure that is what she wants?"

   "Absolutely, you know how big a slut she is," River replied.  "Just make
sure you keep fingering her cunt and she will love it."

   Simon shrugged his shoulders, as River knew he would.  He pulled his
cock out of Kaylee's pussy, her moans of disappointment quickly stopped by
his probing finger stroking her clit.

   "Kaylee," River told her friend when she saw Simon moving his cock
towards her ass.  "Get ready because Simon is going to fuck your ass now."

   River held Kaylee's head firm with her arms and legs as the other young
woman made an attempt to protest as Simon began to slowly stretch her ass
open by pushing his cock into her.  River felt her body tremble in orgasm
as she came watching her brother assfuck Kaylee, her cunt spasming juices
across Kaylee's face and mouth.

   As River came it gave Kaylee a moment to get free but it had turned out
River was right and she absolutely loving it.  "You are devious slut
River," Kaylee murmured to her friend as she crawled up her body, Simon
slamming his cock into her ass helping push her forward, stopping only
briefly to lick her small breasts.

   River didn't bother with a verbal reply as she kissed her friend deeply
when she had finished her journey of trailing kisses up her torso.  She
wrapped her long legs around Kaylee so that they were touching Simon,
allowing River and Kaylee to grind their pussies together.

   Simon once again found himself on the brink.  This was his first time
fucking someone's ass and Kaylee's was wonderfully tight.  But what was
driving him to cum so quickly was the sight of watching his sister and
lover make out with each other, their lips locked together as their
breasts, one pair large another small, rubbed against each other.  He was
pounding his cock as hard into Kaylee as he could just to drive the two
girls closer together.

   "Shit ..." Simon muttered using a rare swear word.  "I am going to cum
again."

   He pulled his cock out beginning to jerk it with his hand, as he moved
away taking out the balance for Kaylee.  She, and River along with her,
awkwardly tumbled out of the hammock.  Not to be denied by the awkward
situation River took advantages of it.  Putting one arm around Kaylee and
bringing them up so they were on their knees, faces pushed together,
looking up at Simon.  "Simon ...  please cum all over us."

   Simon obliged his sister's request, his cock one more time exploding,
this time not in a mouth but instead shooting another load of cum across
Kaylee's and River's faces, the two girls then turning to each other to
lick the other clean of Simon's cum.

   A few minutes later River had climbed back into the hammock.  Much more
gently now Simon and Kaylee were again rocking against each other on the
floor.

   'Kaylee and Simon, fucking in the engine room ...  yeah that sounds a
lot better' River thought pleasantly as she drifted off to sleep.