Chapter Text
Sirius knows it's wrong.
He knows he shouldn't be doing this.
That doesn't stop him from slipping the potion into Harrie's tea. That doesn't stop him from anxiously waiting until past midnight, sitting in his bedroom on the fourth floor of Grimmauld Place, and then padding down the corridor and to the third floor, where Harrie's bedroom is. And that doesn't stop him from stepping inside.
He is cautious when he pushes open her door. The old house creaks and groans even in the dead of night, and any sound echoes far. He's usually alone with Harrie at this time of the day, but it's no guarantee. Any Order member could come in through the Floo if there's an emergency.
There's always a risk he'll be discovered.
It only makes it all the more thrilling.
He closes the door behind him and approaches Harrie's bed. She's sleeping on her side, blanket hiked up to her neck, curled up and facing away from the door, her dark hair splayed out in frizzy tendrils on the pillow.
He stands there for a moment, watching her sleep. This is the moment where he hesitates. Where he tells himself he can turn back and never do this again. That he can still be, if not a good man, a better man than he was yesterday.
But his cock is achingly hard, and his palms prick with the need to touch her.
He is never a better man.
He climbs into her bed and draws back the blanket, uncovering her body. She's wearing soft, comfy pyjamas that are a pretty light pink. The color suits her. He palms her covered arse, kneading it through the fabric. She doesn't react.
She never does.
He's a thief, stealing moment after moment from her, and she remains oblivious.
Gently, he pushes her onto her back. Straddling her properly, he lifts an errant strand of hair out of her face, then trails his hand down her cheek. His thumb brushes across her lips. He applies a bit of pressure, testing their plumpness, their firmness, and he groans when the tip of his finger slips past her lips and enters her mouth.
"Look at you..."
He thinks about kissing her. He always thinks about kissing her, but he can't. He's already such a monster, desecrating Harrie's body like this. He won't steal her first kiss while she's not even awake for it.
His hands wander lower. He rucks up her pyjama top until her breasts come into view. They're small and lovely, with pretty pink nipples. His mouth is on them immediately. He licks and sucks, tracing the swells of her breasts with his tongue, drawing her nipples into his mouth, teasing them with the tip of his tongue and the edges of his teeth.
He can taste the salt of her skin, and another flavor that's uniquely hers. She always smells so sweet. So alluring. Her scent suffuses the house, and wherever he is, he can smell her. When he happens to enter a room she just left, he finds himself half-hard just from her scent.
His tongue dips lower.
He jerks her trousers down impatiently, pulls them off completely, discarding them somewhere on the floor. He parts her legs and finally sets eyes on her little cunt. The sight sends a jolt of heat to his groin every time.
Harrie is so pretty down there. And it's something for him alone.
No one has ever touched her but him.
There's some dark, possessive part of him that relishes the thought. Harrie is his, even if she doesn't know it.
He slicks his fingers with a spell and slides two of them into her. Gently, he opens her up, getting her ready for his cock, working his digits into her tight little hole.
"That's good, Harrie... Good girl, so wet for me... you want my cock, don't you?"
He puts his mouth on her. His tongue swipes at her cunt, parts her pink folds, laves at the peak of her clit. Her own wetness joins the one provided by the spell. Her body responds to him. Sometimes she shifts a little in her sleep, exhaling a sigh, a shiver going through her body. He groans, licking her faster, feasting on that sweet little cunt.
Fingers, tongue—he gives her everything.
Soon she'll have his cock.
For now, he stabs his tongue into her, mock-fucking her, another groan escaping him. His hands pins her thighs to the bed. Her creamy flesh is begging for a bite, right there, on her inner thigh. He restrains himself, though his cock does jump in his slacks when he imagines doing it.
He's careful not to leave any marks on her. He's confident enough she won't wake, not with the dose of sleeping draught he gave her, not when she hasn't woken up any of the other nights—a week since he did this for the first time, a week of fucking his goddaughter in her own bed with no one the wiser—but he can't afford for her to suddenly wake up with unexplained bite marks on her body.
He always leave her the same way she was when he walked in—clothed, clean, and unblemished.
He's gripping himself as he licks her cunt, a hand down his trousers, half-rutting in his own hand. Finally, he leans back and frees himself. His heavy cock makes a wet sound as it lands onto Harrie's bare belly. The head leaks pre-come on her skin.
He gives himself a few firm strokes, spreading more lube up and down his shaft, teeth boring into his lower lip. His cock looks obscenely large like that, the head nearly reaching up to her belly button.
And it's all going inside her.
It was a challenge to make it fit the first time. He had to push past the resistance of Harrie's body, had to take her virginity slowly, feeding her inch after inch of his cock until she'd taken all of him.
"There we go," he says, notching his cockhead at her entrance.
He pushes in, savoring the long slide, the tight, wet heat as her cunt swallows his cock.
Merlin, he'll never tire of this.
"Good girl," he praises, his balls kissing her slit.
Her lips are set in a little pout, a slight frown upon her brow. He wonders if she dreams of this. Of being fucked and filled, of taking cock while he's stuffing her cunt in the waking world.
He withdraws, and her cunt clings to him on the drag back, as if it's loath to let him go. As if his Harrie wants him inside her. His shaft is glistening with wetness and sticky pre-come. He rocks his hips, fucking her, watching her belly bulge with the girth of him.
A sinful sight.
Right now, Harrie isn't the Girl Who Lived. She's not the Chosen One, she's not the witch upon rests the hope of the entire wizarding world.
No.
She's Sirius' little cocksleeve.
He grunts softly as his thrusts pick up pace, the pleasure mounting. He places a slick thumb onto Harrie's clit, drawing tight circles, smirking as her legs start trembling. Seconds later, she gasps in her sleep, an orgasm washing through her.
The spasms of her cunt pull at his cock, trying to milk his seed from him. What a little temptress she makes. But she won't get his cum. He never finishes inside her. He prefers coming on her, splattering his spunk over her belly and her breasts, painting her skin in shades of ownership.
Marking his territory like a dog.
"What a greedy girl you are," he muses, pushing deeper inside her, grinding his cock in her silky cunt.
He's playing with her breasts when there's a noise outside the door. He stops thrusting, a shiver of alarm running down his spine. Is it perverse that the risk of being seen like this, cock buried between Harrie's thighs, makes him burn with terrible lust?
The floor creaks. Footsteps come closer.
He doesn't have any time to react before the doors opens.
"What a surprise," the intruder says.
It's not true for Sirius. If he should be caught, he expected it would be him. The one person who hates him with caustic strength, the one person who never trusted him, even after it came out that Peter betrayed Lily and James, not him.
Snape is sneering at him so fiercely Sirius feels the burn of it against his face. He's too slow in fumbling for his wand, and Snape flicks his wrist, summoning Sirius' wand to him.
Fuck.
He's dead.
Snape is going to kill him and dissolve his body into one of his giant cauldrons. No one will ever know what happened to him.
"I know you were up to something," Snape says, stepping into the room, closing the door behind him. "However, I did not think I would find you rutting into Potter like a dog."
"Snape, wait..."
Snape doesn't wait, because he's never listened to anything Sirius says anyway. He has slipped Sirius' wand into his pocket and is stalking closer. His eyes trace the length of Potter's body, and he emits a little hum.
"What did you use?"
"What?"
"The potion, you simpleton," he hisses as he peels back Harrie's eyelids, checking her eyes.
"It's a sleeping draught."
"Obviously. Which brand and dosage?"
It's entirely absurd that Snape is questioning him about the potion he gave Harrie while he's still balls deep in her.
"Felding's, four drops," he replies nonetheless.
Snape lets out a strange disgruntled noise.
"You're lucky she isn't waking up. Felding's is subpar quality. Are you at least waiting twenty-four hours between each dose?"
"Yes. I'm careful with it. I wouldn't overdose her."
Snape hums again.
"I'll brew you something better," he says.
That doesn't shock Sirius nearly as much as when Snape unzips his fly, tangles his fingers in Harrie's hair, and slips his cock in her mouth. He hears his own gasp. His erection, which had flagged considerably, swells up at the sight of Snape's thick cock entering Harrie's mouth.
"Fuck," he whispers, a ripple of heat coursing through his veins.
Snape is sliding his cockhead across her tongue, giving short little thrusts. There's a bulge in Harrie's cheek from where his cock is poking.
"I've been wanting to stuff her smart mouth since the start of the year," he says.
He groans, angling his cock differently, pushing it down all the way into her throat. It bulges there too, the shape starkly visible.
"All those Occlumency lessons she spent being insufferable... talking back, insulting me... Merlin, she was just begging for my cock in her mouth."
He glances at Sirius.
"What are you waiting for? Fuck the little slut."
Sirius has never obeyed Snape once in his life. He makes an exception just this time.
Gripping Harrie's hips, he thrusts back and forth, spearing her little cunt. They used her in tandem, Snape and he, filling her holes with their cocks. She doesn't make a noise. Doesn't protest when Snape cuts off her air, sliding deep in her throat. The sleeping draught is keeping her nice and pliant.
She's utterly at their mercy.
He can't look away from Snape fucking her mouth. He doesn't want to get aroused by Snape's cock, but damn it, he is. It's long and thick and it looks hot as fuck as it plunders Harrie's mouth.
"Can't believe you're doing this," Sirius grunts.
"Fucking her or sharing with you?" Snape says, flashing him his teeth.
"Both. Merlin..."
He fucks her harder, making her breasts bounce, adding the filthy slap of flesh to the sounds of Snape's cock squelching in and out.
"What a good girl you make, Potter," Snape says. "Offering your body to your professor and your godfather..."
He's breathing hard, his gaze switching between Harrie's mouth taking his cock and her breasts jiggling as Sirius fucks her.
"You love being our little cum slut, don't you?"
He grips her throat.
"This is where you belong, girl. On your back, legs spread, mouth stuffed, silent and subdued."
His cock slips out of her mouth. He strokes himself inches from her face, his fist flying up and down his shaft. Sirius is certain he means to come on her face, and if that happens, he'll come too—won't be able to resist, fuck—but soon Snape is sinking back between her lips.
He gives another couple of thrusts, then lets out a hiss, his eyes closing as he spends himself down her throat. Sirius stops thrusting. He holds still, willing himself not to come right now. Not from the sight and sounds of Snape spurting cum into Harrie.
"Swallow," Snape groans, massaging Harrie's throat. "There we go, good girl."
He pulls out, tucks himself back in his trousers, and charms his hands clean. Then he glances at Sirius.
"Well? What are you waiting for? Fill the girl. Or do you finish in your canine form?"
"No!" Sirius protests, though the idea of mounting Harrie as Padfoot is perversely appealing. "I don't—I've never—I don't come inside her."
Snape clicks his tongue. He joins Sirius on the bed, moves behind him, and puts his hands on Sirius' hips. Sirius opens his mouth to vehemently protest, one, to Snape being so close, and two, to Snape touching him, but then Snape leans in and whispers in his ear, and—
"Today, you will. You're going to paint her pretty cunt from the inside and leave her slit leaking your cum."
—and Sirius forgets anything that isn't Harrie's cunt wrapped around his cock.
He thrusts, thrusts, thrusts, raging heat burning in his groin, his breath coming in pants, his hands locked around Harrie's hips. It's a desperate race to orgasm. He ruts like an animal, each thrust accompanied by a feral grunt.
The only thing on his mind is filling Harrie with his cum.
"Yes," Snape murmurs, his breath hot in Sirius' ear, his hands urging his hips forward. "What a good dog you make. Now come into your goddaughter."
One final thrust hilts him fully into Harrie's cunt. His bollocks draw up, his cock pulses heavily, and he comes with a roar, bathing her cervix with a hot load of cum. He nearly passes out from the raw ecstasy that strikes him. His cock keeps twitching and twitching as he empties himself into Harrie.
When it's over, he's hunched over her, out of breath. Snape says something, acidic and mocking, and he pulls Sirius out, dragging his hips back. Harrie makes a soft, sleepy sound. Her pretty little slit is red and puffy, a fat dollop of his cum leaking out.
"Merlin..."
"Indeed," Snape says.
He leaves the bed and heads for the door.
"I'll have the potion ready by tomorrow morning. You'll give her two drops."
Sirius nods.
"Repeat it," Snape orders.
"Two drops."
"Good." Snape smiles, sharp and nasty. "I'll meet you back here tomorrow night, then. Perhaps we can switch places."
He leaves on those words.
Sirius exhales heavily. Harrie is still sleeping, eyes closed, face relaxed. There's a smudge of Snape's cum at the corner of her mouth. Sirius bends down and licks it away.
Then he's kissing Harrie, groaning as he tastes more of Snape's cum on her tongue.
"I'm sorry," he murmurs.
And he is. For what he just did, and for what he's going to do tomorrow, when he drugs her again and shares her with Snape once more.