
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/1129538.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      James_Sirius_Potter/Lily_Luna_Potter
  Character:
      James_Sirius_Potter, Lily_Luna_Potter, Harry_Potter
  Additional Tags:
      Lily_Luna/Harry_unrequited, Incest, Sibling_Incest, Pottercest, Underage
      Sex, table!sex, Dubious_Consent, Implied_Masturbation, Intercrural_Sex,
      fantasy_ageplay/roleplay
  Collections:
      Daily_Deviant
  Stats:
      Published: 2014-01-10 Words: 2143
****** Sweet Girl ******
by sdk
Summary
     Harry's only ever treated Lily as a father would a daughter. Her
     older brother, on the other hand, has a different way of taking care
     of his little sister.
Notes
     Written for Thilia as part of Kinky Kristmas 2013 on Daily_Deviant.
     Thanks to Torino10154, Roozetter, and Ragdoll for their pre-reading
     and beta help.
See the end of the work for more notes
Lily stands at the doorway to her father's bedroom. She wears her usual night
attire, a thin white t-shirt that barely comes down to her thighs and cotton
knickers to match. She pinched her nipples sore before she came to his room and
she knows they're visible, poking out beneath her shirt.
"Daddy?" she calls softly, edging her voice with the appropriate amount of
distress. She's much too old to be calling him daddy—she's nearly sixteen—but
she loves the way the word feels in her mouth. She loves the way her dad's eyes
soften at the sound of it.
Her father is sprawled out in the middle of the bed. The covers gather at his
thighs haphazardly as if he shoved them down in his sleep. He's wearing a
rounded-collar t-shirt and deep blue pyjama bottoms. Sometimes he only sleeps
in his boxers; she wishes he would have this night as well.
"Lily?" His voice is full of sleep. He rubs his eyes then grabs his glasses off
the nightstand. She can tell the moment his vision goes into sharp focus. His
eyes widen and there's a slight flush to his cheeks. She'd like to think it's
because he likes what he sees, but Harry's only ever treated her like a father
would a daughter. He's never been inappropriate no matter how many
opportunities Lily's given him.
"I had a nightmare. Can I sleep with you?"
"Lily..." He says her name with a sigh and Lily shivers all over. There's a
token amount of resistance, but she knows he won't be able to deny her.
"Please, Daddy?"
He pats the bed and she crawls in beside him. There is a moment when his chest
brushes against her breasts as he pulls the covers up over them both, but it's
over in a flash; it only serves to make her ache more.
"Do you want to talk about it?"
She shakes her head and curls up to his side. He tenses, then lets out a deep
breath, but his hand comes to her head and he pets her hair. Lily smiles into
his shirt.
–
Lily wakes up alone, but when she hears the clattering of plates from the
kitchen, she rushes down the hallway in her bare feet, slipping and sliding
part of the way there.
"Daddy? Oh..."
"Daddy?" James makes a face. Lily's cheeks heat. She tugs on her t-shirt,
suddenly aware of just how little she has on, especially with the way her
brother eyes her over his piece of toast. "He's already gone to work. Left
breakfast for you though."
"What are you doing here?"
"Nice to see you too, Lils."
"I just meant, I thought you'd be with Teddy all weekend. Looking for a flat."
Lily straightens her hair and walks with as much dignity as she can over to the
sideboard. It isn't as if James hasn't seen her like this before.
"You're supposed to be with Mum and Al, aren't you?"
"Quidditch is boring. Besides, Dad needs me. He'd be lonely all by himself."
"Don't you mean 'Daddy'?"
The hot flush renews with intensity, spreading across Lily's face and neck, but
thankfully her back is turned on her brother. She chooses not to respond and
instead concentrates on pouring a glass of pumpkin juice, but she nearly drops
the carafe when she feels James slide up behind her. The heat of his body warms
the back of her bare legs. Her breath suddenly sounds too loud in her ears.
James sweeps her hair back over one shoulder. His other hand rests at the hem
of her shirt, almost touching but not quite. It could be innocent. Lily knows
it's not.
"Went to your room when I got in last night," he whispers, lips grazing the
shell of her ear. "You were sleeping with Dad again, weren't you?"
"So what if I was?" she says defiantly, or tries to anyway, but James is
lifting her shirt ever so slowly until he exposes the skin just above her
knickers. He fingers the elastic waistband, toying with it, and Lily feels
strange all over. Part of her shivers when the flat of his palm ghosts over her
stomach; part of her wants to run.
"Thought we could have some fun, though now is as good a time as any."
"What? Here?" She squeaks, then clears her throat. James chuckles, breath hot
against her ear. He dips his head, lips grazing over her thrumming pulse and
arousal pools at her centre.
"No one's home. No one will catch us."
"What if I don't want to?" she says, but her voice is too weak to properly
protest. She went to sleep aching and woke the same way after a night pressed
against her daddy's side. Her body wants this, even if he's the wrong man. Her
body always betrays her.
James slides his hand into her knickers; she's wet—wet, needy, and ready. She
squeezes her thighs together, trapping his fingers at her core.
"Oh Lily," he whispers into her skin. "When do you ever not want to?"
~
Sometimes Lily plays pretend. She tucks herself into bed and remembers when she
was small enough that her dad would do it for her. She slips her fingers
between her thighs and lets her mind go. Sometimes he's her daddy and they play
tickle monster. Daddy's hands are relentless, flicking all over her waist and
tummy, even when she pins him to the bed and declares victory. He's always hard
beneath her, rubbing against her thighs as he squirms to get free. Sometimes
she notices and asks. He flushes, embarrassed, but always offers to teach her.
He shows her what she shouldn't ever allow other boys to do; he shows her what
to do to make her daddy feel good.
But sometimes he's Harry—Auror Potter, with his black robes sweeping in the
wind, and he rushes in to save her and whisk her away. He's the dashing older
man, oozing magical power that makes her whole body hum. He takes her roughly,
shoving up her skirt and ripping her knickers in two before thrusting inside
her. But he holds her close, whispers how beautiful she is, and she clutches
him as he trembles, spilling himself inside her.
She pretends James is Harry now, with James pressing her up against the
sideboard, groping at her tits and her fanny. Only his arms are freckled and
he's rasping about how dripping wet she is and how tightly she clamps around
his thrusting fingers. He never calls her beautiful.
"I can't wait to fuck you, baby sis."
"You're going to have to," she hisses between her teeth. He laughs, pulling his
hands free from her. She's throbbing and so close, but James never makes it
easy.
He turns her to the table, pulling her hips out so she has to brace herself
against the edge, then presses her back down so her arse juts up in the air on
display. Her t-shirt falls up, exposing her back and the bottom curve of her
breasts. The cool air against her skin makes her shiver. She can feel him
staring and she closes her eyes, blocking out the sight of his half-eaten
breakfast.
She thinks of her daddy.
You're my sweet girl, aren't you, Lily?
He caresses her, hands roaming all over the curve of her arse, fingers dipping
beneath the elastic of her knickers to probe and squeeze. She sighs, spreading
her thighs just a bit, and he slides her knickers down until they stretch
between her knees.
There's the clanking of a belt buckle and the rustle of fabric, then he's on
her again, spreading her cheeks wide. She tenses automatically, her muscles
going taut.
"Not here either, hmm?" he whispers. He rubs his shaft along the line of her
cleft, smearing sticky pre-come along its path. But then he dips down below
between her thighs, his cock sliding over her cunt, the head nudging her
entrance. She floods with arousal, heart hammering hard in her chest, even as
she gasps, "James—"
"Relax, baby sis. I wouldn't dream of breaking your rule."
She's dizzy, her whole body trembles, but that sharp edge of tension keeps her
firmly rooted to the present as he slowly moves between her thighs, teasing
her, teasing himself. He wraps an arm around her waist, holding her still so
she can't shy away from him, but sparks skitter over her skin with each one of
his thrusts; she wouldn't dream of running away now.
He moves faster, panting into her neck, and she manages to reach down with one
hand and feel him there, feel him throbbing and hard, his shaft gliding against
her and almost, almost slipping inside. She wants to imagine it's her daddy,
her Harry, but she's too afraid she'll lose herself and slip up and let James
inside. But for the brief moment that she toys with the idea, James becomes
him.
You're so good for your daddy, aren't you, sweet girl?
Lily's orgasm comes quickly, so intense it takes her by surprise. She gasps,
her whole body tightening to a frightening point as violent trembles radiate
through her from her centre. She strokes James' cock—so slick and slippery
now—and holds it snug against herself as she rides out the fading pleasurable
waves of the aftermath. He groans into her shoulder, rasping nonsensical words
laced with her name, hips pumping against her, his grip on her waist growing
taut and inflexible. Finally he stills and pulses in her grasp.
James' grip loosens. Lily heaves against the table. Her thighs are covered in
white.
The Floo in the next room roars to life.
For a moment Lily thought she imagined it, but James springs up and shoves his
pants and trousers up with one hand, yanking Lily upright with the other.
"Lily," he hisses, but it's nearly lost in the call of her father's voice.
"Kids? It's just me. Forgot something in my office." His voice is coming
closer. Lily is frozen to the spot. James' come drips down her leg.
"Lily!" James hisses again, quietly but with enough force to jolt Lily out of
her fog. She struggles to pull her knickers up and she's only halfway
successful before James plops down in a chair and shoves Lily into one next to
him.
Harry ducks his head in through the archway, a smile on his lips that fades
quickly as his eyes meet hers.
"I didn't mean to scare you."
Lily can feel her skin flush a patchy red all over her body and she's certain
the truth of the last few minutes are written all over face. The heat on her
cheeks is unbearable. She stares at her dad and his eyes grow with concern.
"We were just startled, is all," James says as he kicks her ankle under the
table.
"Right," Lily agrees. Her own voice sounds foreign and strained.
"Is something going on between you two?"
Lily's heart drops to her stomach. Her mouth goes dry and her brain fills with
a never ending chant. He knows. He knows. He knows. She ducks her head, unable
to bear looking at her daddy any longer.
"Naw," James says smoothly. "Just teasing Lils about her crush. She's too
sensitive." He ruffles her hair and Lily instinctively bats his hand away.
"Don't touch me," she mumbles.
"Crush, eh?"
Lily risks a glance and finds the tension in her dad's body has eased, though
it's still present, hovering beneath the surface. His lips quirk in amusement.
"It's not true, Daddy." The word flies out of her without thought; she wants to
cover her mouth, but forces her hands still under the table.
Harry smiles, soft and fondly. "I'll be home for dinner and you can tell me all
about it. But for now, James, cut it out, yeah?"
The edge of a threat laces his last words and Lily feels warm all over. James
nods obediently, Harry says his goodbyes, but Lily doesn't move a muscle until
the Floo roars to life once more and takes her dad away.
James lets out a long breath and leans back in his chair, draping an arm over
Lily's. He eyes her. Lily quickly looks away.
"He's never going to go for it, our dad."
"I don't know what you're talking about."
James scrapes the chair legs against the floor as he gets up, then leans over
and brushes his lips over Lily's temple. She shudders; she's not certain why.
"You know where I am if you ever get tired of waiting," he whispers. He walks
out of the kitchen, leaving the ruins of his breakfast and his promise wafting
in the air.
He's wrong, Lily knows it deep down in her heart.
And she'll never tire of waiting.
End Notes
     Check out this awesome fan_art by Thilia inspired by this fic.
  Works inspired by this one
      All_in_the_Family by Alisanne
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