WARNINGS: This fanfiction deals with INCEST, hence the M rating. The reason I've decided put an oc in this situation is because I feel that the Malfoys seem like a very close knit family and if something like this happended I don't think they would be completely against it. I also thought that it would be a very interesting topic to explore as not many people have dared to venture it. I have read other fanfictions with a similar plot but there were very few, and have not been updated for a very long time and I suspect have been abandoned. Thus I decided to write my own. The plot bunnies wouldn't leave me alone until I had typed it up. And yes, the twins will eventually have a sexual relationship but that won't happen until very late into the story, when they're actually at a legal age. So if this type of relationship disgusts you leave this window now and please don't leave flames about how immoral I am. I KNOW. This is where you UNLEASH YOUR IMAGINATION. So please keep any negative comments to yourself.

Updates will be irregular as I also have college to think about so don't expect weekly updates.

Disclaimer: Harry Potter doesn't belong to me, only my OC Dorian Malfoy.

Chapter 1- My lips are sealed

"...seven, eight, nine, ten! Ready or not here I come!". The young Draco ran as fast as his little legs could carry him towards the stairs as his sister counted, his hair whipping his face at the speed he ran. By the time she had finished counting he had reached the end of the left wing of the first floor of the manor.

Draco stopped in front of a set of large double doors as tried to catch his breath when he heard voices coming from inside the room, with closer inspection he noticed that one of doors was slightly ajar.

"Come now Narcissa, they're almost eight! It's about time they got separate rooms", he heard a voice which he identified as his father exclaim.

"But Lucius...", he heard his mother argue back.

"No Narcissa, they've got to used to not sharing everything with each other. Especially Draco, he's the future head of the Malfoy family, he must learn to be independent. "

"I know you're right but our little dragon is still so young. I worry for him". Narcissa let out a long sigh. "And Dorian. Our poor little girl."

"She's going to be alright darling, she's a strong girl", Lucius said soothingly to her, "she has the blood of the Malfoys and Blacks! That and she has Bellatrix as her auntie...", Lucius muttered the last sentence.

Narcissa let out a quiet chuckle.

"Oh really, Lucius! Talking about my sister like that" she said playfully.

Lucius laughed along with her.

Feeling brave Draco moved closer to the small gap the open door, when a small pair of hands gently closed over his eyes, startling him. He almost cried out in surprise when one of the hands closed over his mouth, muffling the sound.

"Sshh...I found you". His sister whispered in his ear, their breath tickling it as he began to scowl.

"How did you find me so fast? I was sure I was going to win this time" he asked as she released her hold on him.

"We're twins" she replied as if it explained everything as Draco rolled his eyes. "It didn't even take me a minute to find you" she giggled.

Draco pouted.

"Hmph. Go ahead, gloat while you can. But I tell you now one of this days I'll be the one laughing"

Dorian smiled and ruffled his hair affectionately.

"You're just a sore loser Drake. Admit it". Draco crossed his arms and tried to think of a witty come back when she climbed over him to look through the gap of the door. "What were you looking at?"

"Its mother and father. They were talking about us getting our own rooms." Draco replied sulking. He shifted closer to Dorian so he could also see inside the room.

"What? But I like our current room. Why would they-", Dorian began to complain when she let a barely suppressed gasp at something she saw.

"What is it? Move over a bit so I can see too" Draco whispered in an annoyed tone.

"Oh Lucius, stop that! What if the children come?" Narcissa said in tone that suggested she didn't want Lucius to stop.

"They're playing outside. We should be alone for a couple of hours at least, you know what they're like".

"But-"

"What we're doing shouldn't take more than an hour"

"Oh? Are you sure you're not over estimating your stamina Lucius?".

Draco looked inside the room to find his mother sprawled across a sofa, his father laying on top of her with his face buried in the crook of her neck with one hand playing with her hair. His jaw dropped open in shock and he looked at his sister from a corner of his eye to see her reaction. Dorian looked on in fascination, one hand touching the crook of her neck and another her lips. She didn't notice Draco observing her. He looked back into the room only this time to find his mother had her hands tangled in his fathers long hair, pulling his face close to hers as they kissed.

"They're kissing?" Draco said out loud.

"No they're not. Not...normal kissing." Dorian replied.

"Then what-" Draco stopped in shock. "Did he just put his tongue in her mouth? They look like they're eating each other!" He managed to choke out.

"They're not eating each other. It's called french kissing!" Dorian argued.

"French kissing? Putting your tongue in another persons mouth is called french kissing?"

"Of course, didn't you know Drake?" She said matter of factly.

"How do you know?"

"I heard the older girls talking about it at a dinner party"

Draco stared at her.

"You were eavesdropping"

"I didn't mean to..."

"I didn't say it's a bad thing"

Dorian stared back at her brother.

"You're not going to tell me off?"

"You were gathering information. It's a trait of a good slytherin"

She beamed at the compliment, then flushed in embarrassment.

"It was actually an accident. I was hiding under the table from Theo..."

"Of course you were" Draco said in a teasing tone.

"Its true" Dorian said indignantly. "He was chasing me!"

"Theo was chasing you? Dare I ask why?"

"...I ate his cake" she muttered not looking at Draco, who she was sure was smirking at her.

"How juvenile"

She ignored him in favour of looking into the room again.

"I think we should go" Dorian hear Draco say but ignored him. "Before we get caught!"

"Okay, okay, I'm going." The twins scrambled quickly from the door and stood upright, smoothing out their clothes when Dorian stumbled into a table, causing the vase on top to wobble. The twins held their breaths, their faces both a picture of horror, when finally the vase settled back into its original position. They let out breath they didn't realise they were holding and gave a quiet sigh of relief.

"That was close" they said at the same time.

"Who's there?" Narcissa called.

The twins panicked and froze. They heard footsteps coming closer towards them. Draco was the first to recover and hastily grabbed Dorian's hand and dragged her away from the room as fast as he dared without looking back. He didn't let go until they had gone down all the stairs, bursting through the doors of the manor and outside. The last thing they heard was Lucius's voice, "Stupid house elves..."

"Draco, your hurting me!" Dorian yelled, clawing at the hand that was tightly gripped her and glared at him.

Draco looked down to to their joined hands to find that his knuckles had turn white, covered in faint red scratches. He hastily loosened his grip on her as he realised how rough he had been. He looked ashamed. Hesitantly, he gently took her hand and held the it between his like he seen his father do to his mother, running his thumbs softly over the skin that had turned red from the force of the grip. Dorian watched him quietly from under her eyelashes.

"I-I'm so sorry Dorian. I-I didn't mean to- I would never, ever hurt you on purpose. Never. You-you're too important to me. You know that right?" Draco said desperately. He brought her hand up to his lips grazing his lips across her knuckles before finally placing a kiss onto them, just like he saw his father do.

Dorian's features softened and she smiled at him, giving his hand a small squeeze.

"I know Drake. I know" she whispered and brought the hand covered with the claw marks she had made to her face. "I'm sorry too. For hurting you hand."

"I probably deserved it though"

"No. No you don't. You were only trying to protect me, like you always do." Dorian kissed each of the scratches she made, not missing a single one. "There. I kissed it better" she smiled and let go of his hand.

"Thanks. Even though you're the younger twin." Draco added cheekily.

"Only by a minute! The cheek..."

Draco laughed.

"You love me really" he said with an innocent expression.

"Yes, yes, of course." She said between laughing before her expression became somber. " I really do you know. I love you."

Draco smiled back.

"I love you more"

"I love you most". She shot back with smirk.

Draco's jaw fell open for what seemed like the hundredth time that day.

"How do you that? I really need to think of counter reply to that..."

Dorian ruffled his hair.

"Don't think too much over it Drakey"

"Hey!" He shouted, "I take offence to that"

"Oh, I'm so sorry big brother" Dorian managed to get out between laughing whilst Draco glared at her half heartedly.

A few seconds passed before Dorian stopped laughing, though her eyes still twinkled with amusement.

"About what we saw with mother and father...let's never mention that again" Draco said, his cheeks tinged bright pink.

"My lips are sealed." Draco sagged in relief. "On one condition". He groaned, knowing that if his sister had agreed so quickly their had to be a catch.

"Well, what is it?" He muttered, crossing his arms impatiently.

"Close your eyes and I'll show you!"

He looked at her suspiciously, seeing mischief dancing in her eyes.

"Why? Are you going to do something hideous to my face?" He asked, his eyes narrowing.

"Just do it! Don't you trust your sister?" Dorian had a perfectly innocent expression plastered on her face while Draco made no move to do as he was told. Dorian sighed. "I promise I won't do anything unpleasant to you. Please Draco? It's something I've wanted to try even if it's just once, and you're the only person I would try it with" she pleaded, fluttering her eyelashes at him.

The corner of Draco's lip twitched. He raised his arms up in defeat and let out a long suffering sigh.

"Go one then." Dorian clapped in delight. Draco slowly closed his eyes, the last thing he saw were a pair of light grey eyes that were the exactly the same to his own.

Dorian waited and counted to three before she moved closer to her brother, their faces now only millimetres apart. Draco was tempted to open his eyes to see what his sister was up to and was about to when he felt her breath tickling his face, their noses briefly touching each other. What is she doing?

Dorian gulped and hesitated. Go on! You've been waiting for an opportunity like this, don't chicken out now!

Just as Draco was going to open his eyes and ask her what was taking her so long, he felt something warm press softly on his lips, before firmly covering them fully.

What is this? Draco thought, his mind racing. Wait! Lips! Dorian's lips...

They're on mine. Is this what people call kissing?

Draco started to subconsciously move forward to press his lips harder against Dorian's, but before he could react she had already pulled away.

He opened his eyes and stared at his sister who had an unreadable expression on her face while his face burned.

"Dorian...what was that?" He asked cautiously.

She flashed him a smile, saying nothing.

"A...kiss?" He asked.

She had a thoughtful look on face.

"Yes. A kiss."

Draco's eyes widened.

"My lips are sealed" she said, pretending she sealed her lips and threw away the key. "And so are yours?."

Draco nodded dumbly.

What am supposed to keep quiet about? What we saw mother and father were doing? He inwardly shuddered at the image. Or what we just did?

He touched his lips, thinking of how his sisters lips had felt like on his; they still tingled and when he licked them he still could taste her. He wanted more. It made him wish they could do it again. And again. And again...

"Draco? Are you coming?" Dorian's voice broke through his thoughts. He looked up to see his sister had a worried expression on her face, though his eyes subconsiously drifted to her lips. The lips which were a perfect copy of his. "Are you ok?"

Draco mentally slapped himself and responded with a smirk.

"Of course. No worries."

Dorian rolled her eyes at him.

"Well, come on then! I'm hungry." She held out her hand, looking expectantly at him. He stared at it for a few moments. She waited. Finally, he accepted the gesture and gave it a small squeeze, the siblings walking together back into the manor.

"My lips are sealed..." Draco muttered to himself.