
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/402767.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/M
  Fandom:
      X-Men:_First_Class_(2011)_-_Fandom
  Relationship:
      Mystique/Charles_Xavier
  Additional Tags:
      First_Time, Anal_Sex, Genderplay, Sibling_Incest
  Stats:
      Published: 2012-05-12 Words: 1107
****** sugar milk and molasses ******
by pearl_o
Summary
     The first time Charles gets fucked, it's with Raven's cock.
Charles knows more or less what to expect. Part of that is from what he's
overheard plenty of times in other people's minds - he can still remember one
particularly vivid experience, of being thirteen and sitting down on the train
across from a handsome man staring out the window; he'd brushed into the man's
mind without thinking, and the images he was reviewing in his memory were so
pornographic, so scorching, that Charles had immediately sported an intense
erection. He'd had to hunch over himself in the seat, uncomfortable and barely
able to breathe, stuck in that position for what seemed like ages, until the
man had left and a severe-looking middle-aged woman thinking about knitting had
taken his place.
And even besides his telepathy, too, Charles has experimented before by
himself. It was awkward and a little embarrassing, stretching out in his bed,
trying to figure out angles, wondering how his fingers would compare to an
actual cock. But it felt good, anyway. It had been worth it.
So between those two elements, Charles thinks he is really quite well-prepared.
Certainly as much as he could possibly be, all things considered. But even so,
when it comes to the actual experience, to this actually happening to him,
right now - it's overwhelming.
"Charles?" Raven says, her voice sounding a little uncertain. "Charles, are you
okay?"
He forces his eyes open, giving her a reassuring smile. "I'm good, yes, it's
good, keep going."
Raven still looks doubtful, but he stretches his hand out to find hers on the
mattress beside him, and squeezes tightly. Raven takes a deep breath and pushes
in further.
Charles tosses his head helplessly back and forth on the pillow. All of his
nerves feel alive, tingling like he's had an electric shock or like they've
fallen asleep, except good, it all feels good. He can hear his own breathing,
and it's heavy, it sounds almost wet, like there's a sob hidden in his throat.
Raven's face above him looks oddly angelic. All the parts of her he can see are
the same as her most common form, the blonde and blue-eyed one she wears day-
to-day. When Charles licks his lips, he can still taste her sweet pussy, even
though it's gone now, as if it had never existed in the first place. When she
had shifted into a boy afterwards, she had tried looking like one of their
classmates at school, then a creation of her own, but both had felt wrong. It
was Raven who was going to fuck him, and so it was Raven Charles wanted to see.
He had felt her confusion when he tried to explain it to her, but she'd
shrugged and followed his wishes anyway. Only her genitalia is different now;
even her breasts are still, bouncing slightly within Charles's viewsight every
time she moves. Even that juxtaposition there is another thing adding to his
arousal now.
She comes to a stop when her cock's fully sheathed in him, her balls against
his ass. Charles shivers and it just heightens his awareness as he tightens
around this foreign entity, so undeniably inside him. It hurts, but he likes
the way it hurts; it just makes him want more.
"What do I do now, Charles?" Raven says. Her breath's coming heavy again, too,
though it's nothing like the way she'd sounded when he was going down on her.
She's still in control now, still totally coherent. Charles is the one who is
feeling undone.
Charles inhales deeply and holds it for a long moment before letting it out
again slowly. He can feel his muscles start to relax around her. "You can move
now," he says.
He can feel the force of Raven's concentration as she starts to shift her hips,
shoving against him with short, hard thrusts. She's worried about doing it
wrong, and he sends her all the reassurance he can, because everything she does
feels good. He doesn't know if there's any way she could do it wrong.
He closes his eyes again and slips a hand between their bodies, wrapping his
palm around his cock. He's already slick with precome, and his hand moves
easily, quick rough jerks with a twist at the head. The back of his hand hits
against Raven's stomach on every upstroke.
"Raven, will you-" he starts to say. "Can you-" He drifts off, not sure even
how to phrase what he wants.
"What is it?" Raven says. Curiosity, fascination, pleasure, though the latter
isn't nearly as strong as his. Charles can't think how he got lucky enough to
have someone like her, someone who cares for him this much, who will do such
things for him. She's his best friend, and she's brilliant.
Charles bites his lower lip, worrying it between his teeth until it aches, and
then he just blurts it out. "Can you make it -- bigger?"
"Oh," says Raven, surprised, and then Charles can feel it, her cock actually
growing inside him. Not much, he doesn't think, it couldn't be very much at
all, but anything feels like a lot in such a small space, and he feels so
complete, full beyond belief, like she's touching and finding every good spot
in his body. The pleasure spikes all at once, and he's coming for what feels
like a long time, arching his back as he shakes through it.
He falls back against the bed. Every muscle feels relaxed and soft and lazy
now, and it contrasts completely with the hardness of Raven's cock still inside
him. When he meets her gaze, her eyes are wide and golden - she's slipped a
little with her ability, but it's not like he can blame her.
"I didn't think you'd come that fast," Raven says frankly, and Charles
scrunches his nose at her. "Do you want me to stop now?"
"No," Charles says. "You can keep going. If you want to, I mean," he adds after
a moment.
Raven starts moving again, and Charles can't help but cry out. Raven is going
to hesitate, he knows, but he can't quite speak now, so he sends her the
thought instead. Don't stop now. Please.
"You really like this," Raven says, and Charles starts to say something but her
next thrust pushes up against some new spot, and he has to turn his head
sideways on the pillow, bringing his fist to mouth to bite at the knuckles.
"After this," Raven says thoughtfully, "I think you should lick me like that
again. What do you think?"
Deal, Charles thinks at her, and it's the last coherent thought he has for a
few minutes.
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