A/N: A disclaimer: This is written for fun, not profit. I do not own anything except the plot. Warnings: Incest, somewhat violent sex with implied blood play and breath play.

"I want to hold you close

Skin pressed against me tight

Lie still, and close your eyes girl

So lovely, it feels so right

I want to hold you close

Soft breath, beating heart

As I whisper in your ear

I want to fucking tear you apart"

- Tear You Apart by She Wants Revenge.

There is no denying that Narcissa Black is a beautiful girl. She is picture perfect, with a grace and air of regalness that cannot be achieved. You have to be born with it. Everyone desires her, men and women alike. They all assume she is flawless.

But Bellatrix knows better. She knows that Cissy's biggest flaw is precisely this. She is too beautiful. There is something wrong with that level of perfection. It needs to be violated.

So that is exactly what she does.

She bites and scratches, doing her best to mark that delicate, porcelain like skin.

She ignores her cries as she roughly shoves her fingers inside her. Her protests soon morph into moans of pleasure anyway, and suddenly she is no longer begging her to stop, but to fuck her harder, faster.

She loves watching her proper sister come undone beneath her.

Then, Cissy begins dating that Malfoy boy who is far too slick for Bella's liking. That's when she is consumed by the desire to trulybreak her. She is her baby sister. She is the only one who is allowed to corrupt her.

She knows she scares her when she gets possessive. She gets even rougher than usual, doing her best to draw screams of pain - no pleasure laced in. No, she wants to inflict pure, raw pain.

She feels no regret as she stares down at her sister's tear stained face. It is only through blood and sweat and tears that she can learn who she really belongs to.

She wraps her fingers around her sister's slender throat and she drags her knife across her skin. She can take her life easily, in less than a second. She only needs to tighten her fingers a little more, or press the tip of the blade just a bit harder; and Narcissa will be nothing more than a lifeless doll. But they both know that she never will. The fact that Cissy is so demanding and spoilt by nature makes it all the more delicious - Bellatrix is the only person she would trust with this kind of control.

She watches the beautiful patterns blood leaves on her sister's pale skin and feels her vein pulse beneath her fingers. She licks her wounds like a cat. That is what real perfection tastes like. Not sweet and cold, the way Narcissa normally tastes. No, perfection is her sister's gloriously pure blood, mixed with the tangy taste of sweat and the salt of tears.

She hates when her sister smells like him, a horrible, musky scent - it makes Bella want to vomit. Instead, she makes sure Narcissa smells like dark chocolate and amber and the heady scent of madness - like her.

She is so beautiful, she wants to fucking tear her apart so no one else will want her. She marks her territory, almost like a dog would.

(There is a reason why Sirius's animagus is a dog, the Blacks share more traits than they would like to admit.)

She likes to pause for a moment just before she begins her fun. She lays her head against Cissy's chest, listening to her heart pounding against her ribcage, fluttering with both fear and desire. She revels in the fact that she is the only one who can make her feel like this.

And then, she brings the blade down in a flash of metal. She enjoys it, of course. But she also doesn't have a choice.

The scars she leaves are the only things that can remind Narcissa who owns her soul, no matter who she gives her body to.

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