Harry Potter isn't mine, it belongs to some whacked old lady named JK Rowling who killed Fred. 'Cept, I'm bringing him back from the dead…ain't I good? :P

A/N So I had to delete my other stories due to personal issues, but now I am able to come back. So, here's the first. Enjoy. Think I got all the typos out, if not, sorry bout that!

Lab Rats

The Experiment

The sun was low on the horizon when Fred Weasley turned the open sign to closed in the front window of Weasley's Wizard Wheezes. Saturdays were always dead crazy and it had been a long, tiring day. Despite the fact that it was a weekend night, he would have liked nothing more than to go upstairs, eat the first edible thing he could get his hands on, and then go straight to bed.

Problem was, this particular Saturday evening was booked already…thanks to a promise they had made their little sister, or to be more concise, their little sister's best friend. Though Ginny had been the one who had talked them into it…well, bullied really, it was Luna Lovegood who was to blame for the fact that he couldn't eat and go to sleep. Her and her silly research for the Quibbler.

Luna was doing an article on twins. Some things she had made them do had been rather comical, like when she and Ginny had put them in different rooms to see if they could guess what the other were thinking using telepathy. Some were strange, like when she had insisted she watch them groom themselves to see if they did it in exactly the same manner (which they did, but from grooming in the same room for 17 years and for no other reason). Some were downright disgusting. Like when she had tried to get them to give her armpit hair to take to look at under a magnifying glass so she could see how alike their Arglebug's were. Whatever the hell they were.

Over the past two months, Luna had watched them eat, watched them work, watched them read, listened to them shower, two weeks before, she had even spent the night in the flat with them to listen to them dream.

"You don't suppose she is going to make us do anything…" George made a face "Too weird tonight, do you?"

"I hope not." Fred yawned "I'm friggen beat."

"Maybe it won't be so bad," George grinned "like that time she had us eat all that ice cream fast to see if we got ice cream headache at the same time."

"Oh yeah, all that fudge ripple was good. Long as she doesn't try to pluck out nose hairs to see if we tear up at the same time again." Fred shook his head, grinning despite himself. "That's just strange, even for Luna."

"Gotta admit, she is pretty cute…you know, since she came back from university and grew up."

"Not saying she isn't cute." Fred shrugged "Just saying I want to keep my nose hairs where they belong."

George elbowed Fred. "There she is."

Fred turned towards the window where, just crossing the street towards them was the woman in question. She wore a short midnight blue sundress that buttoned down the front, yellow flats, and carried a huge yellow bag. Her wand was tucked over one ear, and over the other, was a quill. Feeling eyes on her, Luna looked up and waved happily. Fred and George answered her wave nervously, just as they always did when Luna came to use them as her twin lab rats.

"Hello Fred, Hello George." She brushed an absent kiss against their cheeks, smearing them very slightly with her pearlescent pink lipstick and giving them a whiff of her musky perfume.

"Hey Luna." They each said in turn.

"Are you ready?" She smiled in excitement, her eyes darting back and forth between them. "I have a feeling we are in for a big discovery tonight!"

Fred and George looked at one another over her head. Luna said that every time they got together, so far they hadn't discovered anything but that she was even stranger than they had thought, and much different. Over the weeks they had grown very attached to her, for Luna was incredibly sweet, it made them wish they had become friends sooner.

"Yeah, sure." George smiled, then used his wand to lock the door.

"Oh wonderful!" Luna tucked her hands in the crook of their elbows and drew them towards the stairs. "I have quite the experiment planned for tonight! I think this could be just the breakthrough I have been waiting for."

They went up the stairs, locking the door at the bottom as they went, then George lit the lamps upstairs. Luna dropped her bag onto the table and then turned to them with a smile.

"Now, I know this may be a bit shocking to you." She turned to them with serious eyes.

Fred nearly laughed, after all this time, Luna would have to do something pretty strange to shock him. At his side, George grinned a little, unconsciously mirroring his brother's thoughts.

"I need to find out how you react to a very different sort of stimuli."

"What sort of stimuli?" George asked nervously, resisting the urge to cover his nose.

"Pleasurable stimuli…" She said matter-of-factly

Fred and George relaxed for a moment…and then, Luna finished her sentence.

"…of a sexual nature."

"Luna…" Fred and George backed away towards the door

"I am not having sex with him!" They said at the same time, their eyes wide with horror.

"No silly!" Luna shook her head and laughed, "I don't want you to have sex with each other, that would be weird, not to mention, I think that's illegal. I wouldn't want to break the law, that would be unethical, not to mention disgusting."

Fred and George looked at one another, unsure whether to be relieved or not. Off hand, they couldn't think of anything that would be worse then Luna wanting them to have sex with each other, but she was Luna Lovegood after all. For all they knew, she could have a hoard of hookers, female and male, downstairs waiting for her to whistle.

"Besides, I think that would defeat the purpose." She went on; oblivious as usual to their panic. "The idea is to find out how one of you reacts while the other is being stimulated."

Fred stopped her with a raised hand. "Luna, exactly who are we supposed to have sex with?"

She looked at them for a moment, as if they were the densest two beings on the planet. In retrospect, Fred and George realized that they had been.

"Me of course, who else?"

Fred and George looked at her in shock. They knew Luna was very dedicated and she was very responsible for reporting truthfully, as responsible as someone who wrote for the Quibbler could be that is. But to actually have sex, with both of them, that was taking dedication a bit too far.

"Luna," George began "I don't…I mean…"

"Maybe this isn't the best idea." Fred finished

"Why not?" She looked at them blankly, as if she frequently took part in this sort of thing and couldn't understand why they would have a problem with it.

"Well, there are two of us and one of you for starters." George shrugged. "Don't you think that is a bit…?"

He struggled to come up with the right words, but the more he thought, the only words that came to mind was wildly erotic.

"Right…" Fred nodded in agreement. "It's totally…"

Like George, Fred tried to think of a description…and, like George, only one two words came to mind; fucking hot.

Even though Fred and George had shared everything else in life, the idea of sharing a woman had never occurred to them. Chalk that up to their madly puritanical mother. They hadn't so much as dare bring a dirty magazine into the house, though to this day there were several hidden, wrapped in plastic wrap and buried in holes they'd dug in the high grass that surrounded the Burrow.

"Luna," George began, something else had occurred to him. "Have you ever been with a man?"

Luna gave him the you-are-so-dense look again. "Of course I have, several times, haven't you ever been with a woman?"

George looked at Fred and they laughed. "Of course we have."

"Then I don't see the problem, although, if you find the idea of having sex with me distasteful, I suppose that could be a problem."

"No!" Fred said, afraid of hurting her feelings

"Of course we don't!" George added on, not wanting to seem rude.

As they said it, they realized that they didn't…not at all. In fact, they found the idea quite desirable. Luna had grown up in her four years away at school. She had done something to her hair, it was thicker now and it was silvery blond, the color of moonlight. Her wide silver eyes were still way too big, but they had lost that innocent dottiness and as she looked at them they bore the first stirrings of desire. Obviously, Luna didn't find the idea of having sex with them distasteful either.

"Wonderful," She smiled and looked back and forth between them. "Then we don't have a problem."

She moved closer to them and put her arms around Fred's neck, pulling his face down to hers. She blinked at him for a second, and then she kissed him, tracing his lips with her tongue. His lips parted willingly, wrapping his arms around her to pull her closer, but she pulled back and smiled. Then, she turned to George and repeated the action.

"You kiss very differently." She said as she let go of George's neck, sliding her hands provocatively down his chest. "You're both very good at it, but in different ways."

She turned away from them and went to her bag. "I'll have to test you separately, and then together." She reached in and pulled out two toothpicks, then, she broke the end off one and held them clenched in her hand.

"One of you will have to watch, and the other will have to participate. Short toothpick watches."

Fred and George looked at one another, both chanting repeatedly in their heads…

"Long, please, let me get the long!"

They drew at the same time, and in the end, it was George who came up short. Fred did his best not to croon in victory.

"Oh, "Luna turned to Fred "I'm sorry Fred, but maybe while all three of us are together you'll get to discover something too."

Fred was discovering something all right, first, George was pouting and second, he was already semi-hard just from kissing her.

"Well, shall we get started?" Luna smiled and reached for a chair, tugging it into the first bedroom, George's bedroom.

'Lovely' George thought, mild annoyance building, 'my room and I'm the one who has to sit out.'

Fred winked at him cockily and then followed Luna. George rolled his eye and went close on heels.

"Okay George," Luna patted the chair. "Sit here."

Grudgingly, George sat in the chair and Luna disappeared back into the other room for a second. She came back and in her hands, she had two white silk scarves.

"Erm…Luna," George asked, "What are you doing?"

"In the heat of the moment you might try to cheat." Luna looked at him apologetically. "If you masturbate it will throw the whole experiment off, and we would have to start all over. We can't have that, now can we?"

Fred had to turn away to keep Luna from seeing him laughing. Somehow, he was sure masturbating would be the last thing on George's mind if he decided to cheat. George glared at Fred's back, quite sure that he was being laughed at. What the hell would be so bad about having to start the whole thing over again anyway? Chances were, Luna would make Fred sit in the chair next time, since he was so weak after all.

Fred turned around; his eyes went to the sweet curve of Luna's ass as she bent over George, tying his arms in place. He had looked at her ass plenty of times over the past few weeks, but now, knowing what was about to come, it was too much to resist. He moved up behind her, sliding his hands slowly up her legs to her hips and rubbed against her.

"Oh!" Luna said happily as she stood and leaned back against him. "I didn't realize you were as excited by my research as I am Fred!"

Fred looked over her shoulder at George, even George couldn't help laughing at the irony of Luna's words.

"He's excited alright." George shook his head and rolled his eyes, hoping fervently that Fred was excited enough to make it quick.

"Yes, I am very excited." Fred said huskily, brushing Luna's hair aside to nibble at her neck. His hands slid up her front, stopping for a moment to knead her breasts, then went to the buttons on her dress as he pulled her back toward the bed.

Luna kept her eyes open, watching for George's reactions when Fred eased her dress down her arms, over her hips and finally as it slid onto the floor. His eyes were huge as he took in her body; it was even better than he had imagined. Her breasts were modest, just big enough to entice, but unlike most young women, Luna had very large, very dark nipples.

Fred and George licked their lips at same time, something Luna was careful to take note of just before Fred pinched them between his fingers. He slid a knee between her legs, parting them, and then slid a hand down her body and inside her panties. She was already wet and his fingers slid over her easily. George watched on, more than conscious of the growing discomfort in his pants.

Luna thrust her hips forward, her hands gripping his legs tightly to stop herself from slipping to the floor.

"Cum for me Luna." Fred whispered against her neck, his breath hot and coming heavily as he slid a finger inside to stroke her, rubbing his palm against the swollen nub.

"Uhhh!" She grunted loudly, thrusting her hips in time with the plunges of his finger "Deeper!"

Fred pulled her panties off, then moved back, sitting down hard on the bed and pulling her down into his lap, spreading her legs wide with his knees. George's eyes bulged when Fred slid in another finger, pumping in time with the thrusts of her hips, and then reached down with the other hand to rub her clit. She was grunting loudly, nearly out of control, her hair whipped wildly around her head. He was definitely uncomfortable now, but Luna had ceased to pay him the slightest attention.

"Cum Luna!" Fred said loudly, his own cock in need of attention now. "I want to fuck you so bad!"

"AHHHHHHHHHHHH!" Luna screamed out and a hot gush of wet flowed over Fred's fingers with her orgasm. Her body shook and Fred plunged his fingers deep inside of her, hopelessly turned on by the feeling of her pussy squeezing around him. She paid George no attention and shifted around to face Fred, kissing him hard, her tongue plunging deeply into his mouth. His tongue met hers, fighting one another for dominance, his hands on her ass pulling her closer as she reached down to pull his shirt off. Their bodies pressed together and she pushed him onto his back, reached down for the button on his pants, then eased the zipper open and with his help, pulled them off.

She stroked his cock appreciatively, her eyes half open a dazed. "You have a big cock Fred."

For once, Fred didn't mind someone pointing out the obvious.

"I want you inside me, now." She moved over him, her wetness brushing him as she straddled him. Fred moaned as she moved into position, his cock pushing desperate against her. Then very slowly, she slid him inside of her.

"Luna," He sighed and reached up to squeeze her ass, guiding her over him. "You are so fucking tight."

"I do have to admit," She breathed heavily as she gazed down at him, not a trace of guilt on her face. "I lied before; I've never been with a man. I've only masturbated with a dildo, but I've done it a lot."

Fred opened his mouth to comment, but she bent over him and kissed him hard. All thought of complaints vanished as she began to slide her body over him, plunging his cock in and out. She rose up on her hands, taking him deeper, riding him harder. Fred pressed his hips up into her, more careful now than before, but even more turned on. For some reason, Luna had chosen them as her first. It gave the experience a whole new meaning and he was determined, despite the fact that it was rare for a woman to climax her first time, that Luna would be the exception. He slid his hand between them to massage her clit. Luna pushed up onto her knees, giving him better access. She rocked back and forth, slamming down hard, then rising back up again only to slam down again. She might have been technically a virgin, but she had gained a considerable amount of expertise somewhere.

"Uhhhhhh!," She grunted loudly "Fred! I'm…" A wet sticky rush of heat coated his cock as Luna came, her body shook violently and she tightened around him. Fred pushed up hard into her several more times, then he too released.

"LUNA!" He screeched as his cock spasmed inside of her "FUCK!"

She fell over him, both breathing hard, their bodies covered in sweat. His arms went around her and he kissed her forehead. It was then, out of the corner of her eye, that she caught sight of George again. She had forgotten all about him.

His hands gripped the arms of the chair tightly; his knuckles stone white and his face wore a look of intense pain.

"George," She pushed up slightly as Fred's head turned to take in his brother. He might have laughed, but the expression on his George's face was no laughing matter.

"Are you okay George?" She asked in great concern.

"No." He said shortly, shaking his head. "It fucking hurts."

"What hurts?" She asked innocently, now Fred did have to laugh.

"Erm…Luna, think about it." Fred whispered into her ear. She looked at him and he whispered again. "Look at his lap."

Luna's eyes dropped to George's lap as directed, "Oh!"

Obviously, it was time for the second part of the experiment that she had forgotten all about. Now, before George exploded. She reached onto the table for her wand, and then flicked it to release the scarves that held him prisoner. He was out of the chair like a shot, his clothes discarded in a flash as he made his way to the bed, then he crawled onto the bed with them and pulled Luna backwards, hesitating slightly.

"It's okay George," She assured him as she backed up to rest herself against him. "You've been good, you can skip the foreplay."

"Thank god." He moaned as he grasped her hips, and then slid his cock inside her. She was so wet, and so tight, he could barely stand it as he slid in and out of her. He had waited so long for this, all the time he had watch her and Fred have sex, and it had been torture.

His pulling her back had pulled her face level with Fred's cock and she rested her cheek against it. Within minutes he was hard again, she turned her face and licked the head, then slid him deep into her mouth. It was an incredible sensation, two men inside her body at the same time. She began to wonder what it would be like to really have them both inside her, and even though she knew she wasn't ready to take the experiment quite that far now, the idea totally turned her on.

George felt so good, sliding in and out, he was more frantic, the position different from how she had been with Fred. Fred's cock felt heavenly on her tongue and their combined flavor was sweet. His hand's were gripped tightly in her hair, urging her deeper, yet not forcefully as she had heard sometimes men were. She wrapped her hand around him and jerked in time with her mouth, taking him deep into her throat and humming…she had heard it was something that drove men mad. Fred wasn't able to hold out long, he was already sensitive from having cum before. With a loud grunt, he came for a second time and to his appreciation, Luna swallowed all of him, licking her lips with satisfaction. She rested her cheek against him again and used his legs as leverage to push roughly back against George.

"Harder George!" She encouraged "Please…harder!"

He looked at Fred for a second, worried because he too had heard Luna's confession.

"Please George!" She thrust back hard, making him see stars "FUCK ME!"

George gave in, he angled his hips, reaching a spot he knew would excite her and slammed his cock hard and deep over and over again. Luna moaned, her finger nails digging deep into Fred's hips.

"Aaaahhhuhhh!" She screamed out again

He tightened his grip on her hips, and then slammed harder.

"YES!" Luna screamed, the sweet vibrations began once again as she released, heat spreading down George's legs. He slammed against her a final time as her walls went tight and he came hard, his body collapsing over hers and pulling them onto their sides while he pulsed inside her. His breath hot and heavy against her back.

They lay, all three, in a pile of limbs, sweat and stickiness. Their breath slowed and a sense of peace and contentment fell over them. George slid up, pulling Luna with him, and then turned her face to his to kiss her.

"That was fucking amazing." He slid his hand down to rest it on her breast, he hadn't gotten a feel of the delicious, dark red nipples and he was feeling slighted. As far as he was concerned, the night was only beginning.

"Got that right." Fred kissed her, his hand on her hip. "Though there is the matter of someone lying that needs to be discussed."

"Oh," Luna looked nervous; it seemed the time for confessions was at hand. "I know I did a bad thing, but I can't say that I am sorry for doing it."

Fred looked at her and raised an eyebrow, she looked back at George to see he was doing the exact same thing.

"I've always had this fantasy you see, that one of you would be my first, but I could never decide which one it would be. I've had such a crush on you, ever since Dumbledore's army. I tried and tried to chose, but I couldn't. You're both so wonderful you know, so I decided the only thing for it was to have you both. I knew you'd never do it if you thought I was a virgin, so I practiced. I practiced a lot in fact, and when my chance came, I decided to take it."

"What made you think we would go for it?" Fred asked, just out of curiosity. She obviously knew something; they had been lead easily into it.

"I knew you would," Luna grinned at them "The night I watched you sleep, you both had what sounded like rather provocative dreams, and you both said my name several times. It was what gave me the idea actually; you seemed to be dreaming it was an experiment."

"So you set up this whole thing?" George said, flattered despite her trickery "Just to get us into bed?"

"Oh, it will be part of the article; it will just be listed as 'miscellaneous stimuli'. The Quibbler is a family magazine after all."

Fred and George looked at one another, bemused and flattered despite themselves. They knew they should be at least slightly annoyed with her, but it had been far, far too good. If they were going to be tricked into doing something, Luna's way was one hell of a good way to go.

"Unfortunately," She sighed sadly "I have to toss out this particular part of the study."

"Why's that?" Fred asked

"I'm afraid I was too distracted to watch George properly, I have no idea how he reacted at various parts of the experiment."

Fred ginned at George over Luna's shoulder. George grinned back and ran his hand up to cup Luna's ass. "That's easy enough to rectify."

"Right," Fred reached out to caress Luna's breast "We'll just have to repeat the experiment."

"I think we should do it multiple times in fact." George nodded as he leaned over to brush his lips over her shoulder.

"For accuracy." Fred said in agreement, lowering his head to Luna's breast. "Maybe we should do this study long term, over a few weeks."

"Or months."

"Maybe even years."

"Years?" Luna gasped when Fred's mouth covered her nipple. "But I will be finishing the article next week."

"That's too bad." George slid closer, sandwiching her snugly between him and Fred.

"Yes it is." Fred agreed

"Mmhmm. " Luna sighed, feeling their stiffness pressing against her. She looked back and forth between them and then she grinned.

"I guess we'll just have to get together to have sex then."

George grinned with relief…

At least he never had to worry about being stuck in that fucking chair again.

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