A/N: This is my first ever attempt at a one shot as well as at a 'Cursed Genius' (I think that's the official ship name for Bill/Hermione?) story so I hope I do okay. This will be lemony, if you don't like this pairing I suggest you stop reading now. I understand that this is odd as in this Hermione is 14 about to turn 15 and Bill is 23 but just go with it okay?

It was unusually hot the night before the Quidditch World Cup. Hermione had arrived that day to stay at the Burrow. While she was not particularly fond of Quidditch Ginny had spent the entire summer pleading with her best friend to join her. Her excuse being that she would be the only boy otherwise and that Mrs Weasley both missed her and would rather she take her ticket instead. Reluctantly Hermione had agreed and Ginny was thrilled.

It was close to midnight and she couldn't sleep. She had stayed at the Burrow before but for some reason she just couldn't get comfortable in the cot that had been brought into Ginny's room for her. Hermione had been laying there for hours waiting for her eyes to finally close for the night, frustrated at herself as she knew they had to be up at dawn to leave.

Finally giving up she climbed out of the cot to go down stairs for a glass of water or milk to sooth herself. Throwing the blanket off she felt the cool change come in through the window as the breeze hit her bare legs, she rummaged around on the floor until she found an old Weasley sweater to put on and made her way quietly down the stairs. She reached the landing and heard the tap running. Wondering who could be up this late she cautiously peeked her head around the corner before entering the room.

Standing before her in nothing but boxers was the eldest Weasley child. Not that she would call him a child, Bill was a man in every sense of the word. She did not make her presence known as she meandered into the kitchen, her eyes never leaving his toned back. She had only met Bill once before when he had come to the school after Harry had rescued Ginny from the Chamber of Secrets and even then she had been taken my his beauty. His long red hair tied back by a strap of leather and she could see the fang dangling from his ear. Distracted by the older good looking Weasley, Hermione struck her hip onto the corner of the table and let out a small yelp startling Bill who with lightening like reflexes swung around to face Hermione with his wand drawn.

"Oh, Merlin Granger it's only you, gave me a right fright." Sighing Bill lowered his wand and placed it on the counter behind him.

Bill was stunned at the mere sight of her, he had known that she was here and attending the World Cup with them however he had not been prepared for how much she had grown. His eyes followed her as she made her way around the room towards him.

'When had she grown up so much?' he thought to himself as he took in the figure before him. She was barely dressed, from where she was originally standing it appeared as though she only had on an old sweater. HIS old sweater, the B sitting across her chest. As she moved he saw a small pair of black short clung high up on her long legs.

"Sorry…" Hermione muttered as the blood pooled in her cheeks, when Bill remained still blocking the sink she looked up at him only to notice him staring intensely down at her.

Coughing he cleared his throat, shaking his head a little in the process as he looked at the small witch before him.

'She's just a kid Bill, stop.'

'Oh Merlin, he thinks I'm an idiot.'

After a minute of silence and them each battling with their inner voice, Bill moved to the side allowing Hermione access to the tap.

"Up a bit late aren't you? To busy thinking about a boy? Or maybe a book?" Bill joked shifting his weight to lean against the kitchen table.

"Oh ha ha, don't you act all smart with me Bill Weasley, I've seen how many O.W.L.s and N.E.W.T.s you got and I know you were Head Boy. Actually, if you must know, it's this heat. I just feel so restless, what's your excuse?" she took a sip of her water and tried to steady her heartbeat.

"Egypt time." He sighed before taking a step towards her. "Also if you're feeling a bit hot Granger, you don't need to wear my sweater. Even if I am the most attractive Weasley." Bill winked playfully at her as he raised a hand to slightly lift the bottom of the sweater up, exposing Hermione's hip bones.

Peering into one another's eyes as they both caught their breath.

"Oh." Her voice barely above a whisper, "I didn't realise it was yours."

She pushed his hand away and replaced in with her own, slowly lifting the sweater off and handing it towards him. Bill was once again caught off guard as his eyes dropped from hers down to her now exposed chest. Her singlet clung to her curves and Bill was suddenly very aware that he himself was only in a pair of tight boxers that were slowly growing much tighter.

Hermione dropped her gaze and giggled softly as she placed the sweater down on the table.

"Better?" she asked her heart beat racing a million miles per hour.

Before he could think Bill nodded and took another step towards her. Their bodies now flush against one another Bill lifted his hand to her face, his eyes now focused solely on hers.

'Kiss him! Just kiss him! What's the worst that could happen? He pushes you off, it's not like he is around that much anyway.'

Her pulse racing she pushed herself up on her toes and pressed her lips to his. She waited for him to push her away but he didn't. His hand remained holding her cheek as his other snaked around her waist.

'What are you doing! Don't kiss her back! She's not even 15 yet! Get a hold of yourself.'

Ignoring the voice in his head telling him to stop Bill brushed his tongue across Hermione's bottom lip causing her to gasp. He glided his tongue into her mouth and was trying with all his might to go slowly. Soon they found a rhythm and Bill again was shocked as Hermione began to slip her tongue into his mouth as well. Their exchange was becoming more passionate as Bill slid his hand from her face down to rest on her ass squeezing it gently, as she reached up to wrap her arms around his neck. After a few minutes Hermione had to pull away for air.

"I'm so sorry; I should not have done that." She muttered quickly attempting to run away.

Grabbing her by the hand he swung her back facing him, pulling her in to his body. He knew this was wrong, that he was far too old for her, but Hermione wasn't like most girls her age, she was wise beyond her years and he fought to remind herself that whilst she may seem older she was still 9 years younger than him.

"Maybe not, but I should not of kissed you back. I most definitely should not have enjoyed it as much as I did. Yet here we are." Leaning forward his lips captured hers again.

It was as if the world fell away from the pair. Her arms were back around his neck and his hands firmly on her behind, their tongues fighting for dominance as their exchange quickly reheated. This time when Hermione pulled her lips away for air Bill did not release her, instead he lifted her so that she wrapped her legs around his waist and turned to place her on the kitchen counter. A small moan escaped her lips as he trailed kissed down her jaw line and neck. Nipping softly on her collar bone before kissing up towards her ear. Hermione slid her hands into his hair which had begun to fall loose. Billy nibbled at her ear lobe, another moan escaping her lips.

"Just tell me when you want me to stop and I will." Although whispered into her ear his tone was not seductive, it was serious.

Hermione leaned back to look him in the eyes. They were still filled with what she assumed was lust but could see the seriousness in his expression. She nodded and the begun to kiss again, biting softly on one another's lips.

Bill was trying to keep calm and remain focused. He could not let this go too far. She bit down on his lower lip and an involuntary growl emerged from his throat. She didn't flinch at this though as he expected her to but was left amazed as she merely repeated the action and smiled against his lips as another growl escaped. His hands moved in circles up her thighs, he was finding it hard to concentrate. He knew he should stop. That the honourable thing to do would be to walk away now but he couldn't bring himself to do it. Shifting his weight he positioned himself so that he was now standing between her legs. His hands returned to her thighs but instead his thumbs traced circles along the inside of her leg. He wondered why she wasn't stopping him, she was smarter than this he knew it, yet he didn't want her to pull away. His hand slid up her shirt and again he paused waiting for her to say no before placing a hand on her bare breast. Her body was so responsive as he massaged her mould and played with her nipple. She moaned against his lips and he had to pull away slightly to regain his composure.

When Bill was certain he was in control again he began kissing her neck. He needed to touch her and he could see she wanted him to keep going. Hermione was trying not to moan loudly as his lips made their way towards her breasts. Using one hand to steady himself Bill kissed the tops of Hermione's chest as his other hand returned to her thigh. It was Hermione who moved this time, so that one of Bills legs was between hers. His hand slowly crept up her thigh until it was touching the bottom of her shorts. Looking up at Hermione, Bill raised an eyebrow and she nodded. Lowering his head back to her chest he slipped his hand under her shorts and towards her core. Their hearts beating loudly as his fingers traced the line of her underwear. His lips still attacking her breast, he paused momentarily to gage her reaction. When she pushed herself against his hand Bill pushed her underwear to the side, a sole finger tracing the line of her lips.

Hermione pulled Bills head up and took his lips with hers, pushing her body harder against him. Cautiously he slipped his finger inside her. A small yelp at the intrusion and a growl of appreciation could be heard as Bill pressed his finger deeper inside her as his thumb began massaging her clit. Again Bill tried to calm himself and keep a steady pace, Hermione however kept pushing herself further and further onto Bills hand till she was nearly off the counter. Moaning deeply as he slipped another digit inside her, Hermione threw her head back at the coil winding in the pit of her stomach.

Much to the dismay of Hermione, Bill pulled away, looking into her big brown eyes.

"Did I do something wrong?" she asked innocently to the older boy

"No, no, it's just… we should stop." his voice had a sensual breathiness about it that was setting Hermione on edge again

"Oh.." Bill could see the disheartened look in her eyes.

"Or at least take this somewhere more private?" Bill watched astonished as her eyes again lit up and she nodded.

Taking her by the hand Bill lead her to his room on the same landing as Ginny's. Pushing the door open he gestured for Hermione to enter first, she did happily and paused when she saw two beds. Turning towards Bill she raised an eyebrow.

"Charlie and I share." Was all he said before leading her to his bed.

Hermione lay down as Bill positioned himself above her.

"Stop me at any time." He mused and she nodded her approval.

Quicker than before Bill glided his fingers back inside Hermione and began moving them faster. After a louder than expected moan from Hermione, Bill muttered quickly a silencing spell around the room. Hermione slid her hands over Bills muscled torso and looked down to see the very noticeable bulge in his boxers. Feeling brave she slipped her hand beneath the waistband and gasped when she felt just how large he was. Upon feeling Hermione touch his throbbing erection Bill let out a low guttural growl and began attacking Hermione's neck feverously with kisses. Hermione traced along his penis before taking it with a affirm grasp and began to move her hand up and down the shaft, her hands becoming wet with his pre cum.

"Mione, uhh Mione if you don't stop doing that I might not be able to stop myself."

Smiling widely she gripped him tighter and stroked him a few more times. Moaning deeply Bill took his hands from Hermione's core and slid took off her shorts and underwear before lowering his head to kiss her dripping folds. Bill swiped his tongue up and down, drinking in her juices as Hermione's hands went to Bills hair. Gripping him tightly as he sucked on her clit, a sole finger teasing her core as he did.

They didn't know what had come over them. Hermione had never even kissed a boy before tonight and here she was in Bills bed, his head between her thighs making her cry out with pleasure. Bill was trying as hard as he could to control himself but also forget that the witch he was devouring so intently was not only underage but his little sisters best friend. What were they doing, this was insane. Yet it felt so right to both of them.

"Bill.." at the sound of his name he stopped dead pulling away from her.

"Yes?"

"Can I… can I touch you?" her nervous present in her voice as she looked into his sea blue eyes.

Bill nodded and shifted their weight so that Hermione was now above him. It wasn't until then that he noticed she was in nothing but a singlet top, her lower half completely exposed. When she removed his boxers he eyes widened. She had felt how big he was but she was not prepared for seeing him naked. She wrapped her hand back around his thick shaft and began pumping, taking a deep breath and summoning all her Gryffindor courage she leant down to lick the tip. Bills body shuddered at the feeling of her tongue against his manhood.

"Oh Gods Mione!" he let out as she wrapped her mouth around him.

He didn't know if she knew what she was doing, all he knew was that it felt amazing. Hermione was nervous but she kept going, finding that she enjoyed the feeling of him in her mouth. Bobbing up and down she took more and more of him in her mouth each time until she felt him pressing on the back of her throat. Bill was fighting all urgers to grab her head and bury himself further down her throat.

"Mione, oh, oh, Mione, fuck, FUCK!" he moved his body out from under her and threw her onto her back. "You. Can't. Do. That. To. Me." He struggled out, his body hovering over hers.

"Did I do something wrong?" hurt in her voice

Bill briefly shook his head at the young witch. "I would very much like to shag you right now."

Hermione flushed and looked into his eyes pausing for a moment before she nodded. Bill grabbed his wand and said a contraceptive spell before looking at Hermione again.

"Are you sure?" she nodded at him. "Hermione I need to hear you say that you understand what we are about to do."

Reaching up she grabbed the back of his head and pulled him swiftly down towards her, his ear near her mouth.

"Bill" Hermione whispered sweetly. "Fuck me." She nipped the bottom of his hear lobe and released her grip on him.

"Fuck!" he sighed heavily before positioning himself at her entrance. "This is going to hurt a bit love."

Bill began to push his hips forwards towards Hermione when the door swung open.

"What the FUCK are you two doing!?"

The pair looked up to find Charlie standing there in the doorway with the discarded Weasley sweater in hand.