Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/510770.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/M
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski
  Character:
      Derek_Hale, Stiles_Stilinski
  Additional Tags:
      Alternate_Universe_-_Always_a_Different_Sex, Girl!Stiles, Always-a-
      girl!Stiles, Masturbation, Fingering, Cunnilingus, Oral_Sex, Identity
      Porn, Self-Esteem, Stiles_is_still_insecure, Derek's_not_clueless, Sex_Is
      Not_The_Enemy, Self-Discovery, Alternate_Universe_-_Canon_Divergence,
      Alternate_Universe_-_Gender_Changes, Genderswap
  Series:
      Part 2 of So_glad_you_came_to_change_my_universe
  Stats:
      Published: 2012-09-12 Words: 1257
****** My Universe Will Never Be The Same, I'm Glad You Came. ******
by Velocity_Owl87
Summary
     Stiles is used to being the one forgotten, so she takes matters into
     her own hands. Literally. But Derek's not about to let that happen
     and takes it upon himself to show Stiles exactly how NOT forgotten
     she is.
Notes
     Loose sequel to "Just Lie Here and Forget the World Outside", where
     Derek and Girl!Stiles have an interlude. I'm going to admit that the
     idea of Girl! Stiles and Derek having hidden sexy times (or as hidden
     as they can be with werewolves around) and Derek not being so
     emotionally dense is highly appealing. So basically just porn...with
     maybe a bit of feelings and plot thrown in for the hell of it.
     And the title does come from The Wanted song and does work as a pun,
     I can admit it.
She was lying on her side, the only thing covering her being the light sheet
she had thrown on. She wasn't into sleeping naked, but the heat of the night
was too stifling. She couldn't even bear to have her nightshirt on, so the
sheet was a compromise.
Besides, with her luck, either her father or Derek would come in and see her
starkers and that wasn't something that she was ready to deal with. If ever.
She figures her father had seen her naked at various points in her life, being
her father and all that.
But Derek...no.
They weren't at that stage in their...whatever it was that they had. Stiles
refused to think that one shag made them exclusive or something to each other.
Besides, she didn't think that she was the kind of girl to keep a boy, never
mind a man flitting about her like Lydia and Allison did. She just wasn't in
that category.
She knew it and she accepted it.
Just like she accepted that she was probably going to ride on the memories of
their steamy encounter for the rest of her life if that was the way that things
were going to go.
Her breath caught in her throat as the memories of Derek on top of her flooded
through her mind and she had to shift her thighs. She could feel herself
getting wet at the remembered sensation of his fingers inside of her stroking
her to completion. She bit her lip and pressed her legs together to stem her
arousal, but it was no use.
A soft gasp escaped her throat and she had to bite down harder on her bottom
lip as her sheet slipped down across her nipples, making them pebble at the
sensation of the cotton sliding down and the exposure to the cold air.
She closed her eyes and touched her nipples, tweaking them to get them even
harder before she slid her left hand down between her legs. She pressed her on
her mound and started stroking herself. She did it slowly, until the flesh was
soft and pliant and she was able to slip her fingers inside.
Once her fingertips stroked the soft wetness, she couldn't help the moan that
escaped her throat. It deepened as her fingers slid in further and further,
until she was just barely touching that rough spot that made her give out a
soft whine when she brushed it with her fingers.
She canted her hips upward to get a better angle and slid her fingers in
deeper, her cries coming deep from her throat as she stroked the slippery
flesh. She was so lost in the sensations that she never registered the change
of temperature in the room or the other presence until she felt a feather light
touch on her lower belly.
Her eyes flew open and she could only gape as she saw Derek Hale, naked as the
day he was born, perched on her bed with his hands skimming her hips and sides.
He smirked at her as he slid lower on the bed and pulled her towards him,
making her yelp in surprise.
He didn't say anything as he hooked her legs over his shoulders and buried his
face into her moist warmth, the protest dying in her throat as he buried his
nose between her legs and breathing in deeply.
Stiles didn't have time to react before Derek's parting her lower lips with
gentle fingers and licking the delicate flesh with his tongue, making her keen
loudly. The noise was too loud and it made her be embarrassed at how porn-like
she sounded.
But she couldn't stop the noises she was making. Just like she couldn't stop
the heated flush that was spreading from her face down to her body. Nor could
she stop herself from grabbing onto his hair and tightening her legs like a
vise around his head; keeping him in place.
In response, Derek only pressed his tongue further into her, fucking her with
it. She was too far gone to wonder at his skill. Not only did he fuck her with
his tongue, he took the time to lick her with just the right pressure. She
could feel his lips giving her soft kisses before the licks and she was
becoming incoherent and loose limbed as her orgasm built up strength in the pit
of her belly.
She would have stayed like that if it hadn't been for Derek licking a long, wet
stripe up to her clit and then pressing his tongue on the hard nub of flesh.
Her hips jerked up involuntarily and she was sure that if Derek had been human,
she would have broken his nose.
All he did in response was to brace her hips down hard enough that she could
feel the bruises forming and continue to suck on her clit and leave her open-
mouthed and gasping for air as the sensations blend into such overwhelming
pleasure it was almost painful.
She registered pleasure building up and a release low in her belly before Derek
pulled away and rested his face against her thigh, his mouth and chin wetting
her skin as he did so. She closed her eyes and tried to slow down her
breathing, which was coming in short gasps and pants. She felt like she had run
a marathon and she was exhausted, her body loose and rubbery at the force of
her orgasm.
He let her have her breather before climbing up her body so that they were eye
to eye with each other. Stiles could feel his gaze on her face and forced
herself to open her eyes to look at him. Normally, she wouldn't have, but there
was a weight to his gaze that made her want to look at him.
She didn't expect him to say anything and she couldn't verbalize anything
herself. She's sure that Derek Hale's burnt out her ability to form coherent
sentences and all she wants to do is either sleep, or go another round.
Preferably with Derek spooning her while taking her from behind so that his
fingers bruised her hips again.
"What?" She whispered roughly.
"You didn't think I was going to come back, did you?"
Derek asked her, making her sigh heavily.
"I'm not Lydia. Or Allison. I don't have boys, never mind men, lining up to
stick around."
Derek snorted.
"You sell yourself too damned short, Stilinski."
She grinned tiredly at him.
"It's not like I've gotten proof of it before this."
Derek shook his head at that.
"Consider tonight proof."
Derek murmured before he dipped down to claim her lips, letting her taste
herself as he did so, effectively stopping any other comment she could make to
disparage herself.
It worked well, since Stiles was completely lost at how deal with the
situation. Sure, she had seen porn, but that was porn. She also knew that she
should have maybe thought it weird or disgusting, but all she could think of
was that the taste musky and sour before the feel of Derek's cock breaching her
drove all those thoughts out of her mind.
They were going to have to talk about all of this eventually, Stiles decided as
she raked her nails down his back just to hear him growl.
"This is far from done, you know." She whispered in his ear as he thrust deeply
into her, making her slide a few inches up.
"I know. Believe me. I know"
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