
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/836815.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/F
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Bellatrix_Lestrange/Narcissa_Malfoy
  Character:
      Bellatrix_Lestrange, Narcissa_Malfoy
  Additional Tags:
      Wordcount:_1000-2000, Gift_Fic, Sexual_Content, Exhibitionism, Dirty
      Talk, Object_Insertion, Semi-Public_Sex, Sisters, Incest, Sibling_Incest,
      Bondage
  Stats:
      Published: 2013-06-07 Words: 1024
****** On Her Knees, Under a Desk ******
by Gamma_Orionis
Summary
     In which Bellatrix and Narcissa make a brief stop in an empty
     classroom. Written for Kat Ducat.
Notes
     Written for my lovely friend Kat Ducat, because she is wonderful, and
     because the world always needs a little more Blackcest.
Narcissa was walking to class – perfectly innocently, with absolutely no
thoughts that were anything less than entirely chaste in her mind – when she
felt a pair of arms snake around her middle and a pair of breasts push against
her back.
"So glad I caught you, Cissy," Bellatrix breathed in her ear. Her hand moved to
tweak one of Narcissa's breasts and Narcissa flushed.
"Not here, Bella- not now," she muttered, but Bellatrix's finger was circling
her nipple so gently, so delicately, and Narcissa could already feel it rising
into a hard point. She pressed her lips together, annoyed at herself for being
so easily manipulated.
"Eager, hmm, Cissy?" Bellatrix's hand slipped down between Narcissa's legs and
she stroked her through her skirt. Narcissa thrust automatically against her
sister's hand while her face burned, knowing that, at any minute, someone might
come around the corner and see them.
"I said… not now…" she mumbled half-heartedly.
Bellatrix paid her no mind.
"Come here," she whispered, and the next thing Narcissa knew, she was being
dragged into an empty classroom. Bellatrix pushed her down into one of the
desks, then shut the door behind her and turned on her little sister with a
predatory smile. A shot of pleasure ran between Narcissa's thighs and she bit
down on her lips and watched as Bellatrix leaned against the door to
unbuttoning her blouse.
"I've been thinking about you all day, Cissy," she murmured, dropping it to the
floor. Her bra followed quickly, and Narcissa reached out for her, wanting to
feel her breasts in her hands and hear her moaning in her ear, feel her hot
breath against her neck…
"Ah-ah." Bellatrix's lips curled and she drew her wand and flicked it at
Narcissa, who felt her arms being wrenched behind her back. When she struggled,
she found that she couldn't move them.
"I can't have you flailing around while I play with you, Cissy, darling,"
Bellatrix murmured. Narcissa tried to move again, but her arms were stuck
behind the back of her seat as if they had been tied there. Bellatrix perched
on the desk with one leg on either side of her and she hummed softly while she
unbuttoned Narcissa's blouse and stroked her stiff nipples through her bra.
Narcissa's head fell back and she moaned with every caress that Bellatrix gave
her pert little breasts, and when Bellatrix's hands left them, she let out a
small cry of protest and looked up at her, only to see Bellatrix smirking and
sinking to the floor between her legs, under the desk.
"I was thinking of you during transfiguration," Bellatrix murmured. Narcissa
clamped her thighs together on her head, but Bellatrix grabbed them and forced
them back apart. She was so much stronger. "Every time I touched my wand, I
thought of you… of how pretty you'd look with it shoved up into your tight
little body… it'stwelve and three quarter inches, Cissy," she added sweetly.
"You'd break in two if you tried to ride a man with a cock so big – but I'm
sure that you could take my wand."
Narcissa turned red at the very idea and bit her lip, imagining the pain of
having so well-endowed a man inside her, and then the pleasure – pleasure still
laced with pain – of having Bellatrix fuck her with her wand.
"Let's try it, shall we?" breathed Bellatrix, raising her wand and gently
massaging Narcissa's clit through her knickers with the handle. Narcissa's legs
trembled and she moaned and bit her tongue, squirming while the handle pressed
hard against her stiff clit.
"You're drenched, Cissy." She used her wand to move her knickers aside.
Narcissa's pussy was so wet and swollen, and the air felt pleasantly cool
against it. Bellatrix pressed the handle of her wand – so thick and solid –
against Narcissa's opening, then smirked up at her, gently working the handle
back and forth against her hole. "I think I'd like to hear you beg for it. Moan
for it."
"I- I–" Narcissa stammered breathlessly. "I want your wand i- inside my- my-
oh, don't make me say it…"
"Your pussy," Bellatrix finished for her, and then she rammed her wand deep
into Narcissa and giggled as she writhed on it. "There, you like that, don't
you, darling? It feels good, doesn't it?"
"Yes!" Narcissa lifted her legs and propped her knees against the edge of the
desk to give better access. Bellatrix's head was between her thighs in a second
and Narcissa groaned as she felt her knickers slip to the side and her sister's
tongue begin to work against her clit. She arched and pulled as hard as she
could against the invisible bonds around her wrists, desperately wanting to
tangle her fingers in her sister's hair and hold her against her. Bellatrix
moaned quietly and Narcissa's toes curled, for she loved nothing better than
feeling as if she had aroused her sister.
Bellatrix gripped Narcissa's thigh with one hand and held it in place while she
used her other hand to pump the wand into her. Every hard stroke felt like she
was splitting Narcissa apart, and she loved it, loved the pain that she could
endure for her sister, loved how powerless she felt with her legs apart and her
most sensitive parts being used so roughly…
Bellatrix sucked hard on her clit and Narcissa couldn't quite stifle a cry of
pleasure. Her whole body tightened and a wave of sharp, intense pleasure washed
over her. Bellatrix was still pounding her wand in, and it was all too much.
"S- stop- stop it, Bella–" Narcissa whimpered, heaving for breath, and
Bellatrix looked up at her with a cheeky smile.
"What would you do to make me stop?" she breathed.
"A- anything- anything!"
Bellatrix slowed her pace, then finally slipped the wand handle out of her. It
was glistening with her juices, which Bellatrix licked off idly, looking up at
her sister with a thoughtful expression.
"Then return the favour for me, darling," she murmured. "And open the door. I
want people to see you on your knees for me."
)O(
Fin
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!
