Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/395126.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Regulus_Black/Sirius_Black
  Character:
      Regulus_Black, Sirius_Black
  Additional Tags:
      Marauders'_Era, Sibling_Incest
  Stats:
      Published: 2012-04-30 Words: 313
****** Brother Knows Best ******
by hiza-chan_(callunavulgari)
Summary
     See Sirius? Brother knows best.
Sometimes at night, when the others are asleep in their four posters, Sirius
gets a visitor.

He comes swathed in shadows, graceful and quiet on bare feet. He slides open
the curtain to Sirius’s bed, and grins down at him with a feral kind of lust he
never lets anyone see. He mutters a silencing spell to the dark, and crawls in.

It is different than anything Sirius has ever experienced. It is all teeth and
nails and tongues and he can hardly breathe, but he still can’t get rid of the
irrational fear that Remus will wake up when he smells the blood.

The boy undresses him quickly, tongue painting shapes into his chest. They
grind together, panting and moaning, biting and clawing at the sheets. When
their cocks touch, Sirius lets out a surprised shout that he quickly bites back
down.

The other boy takes Sirius’s cock between his pretty lips and sucks so hard
that it hurts. He licks the head almost apologetically, and crawls back up the
length of Sirius’ body to kiss him, pushing him back into the sheets.

He sinks down onto Sirius’ cock, and it’s beautiful and impossible and it feels
so damn good. The boy pants and moans like a good little whore and he smirks at
Sirius the entire time, breathing a chorus of Sirius’ name. And then Sirius is
coming, harder than he ever has in his entire life, and it’s all he can do to
hold back a shout.

The boy settles down, laying his pretty head against Sirius’ chest, sticky with
sweat and with a cock still up his ass. He bites down on Sirius’ shoulder and
Sirius can feel the grin against his skin. It makes his cock nearly twitch back
to life, inside the boy as it is.

The boy smiles up at him.

See Sirius? Brother knows best.
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