A/N: So I actually really like this one... it makes me laugh more than I feel it should. Anyways, enjoy!

They weren't technically supposed to be engaging in intimate, R-rated activities at their friend's place, and especially not during her yearly holiday party, in her bathroom of all places- but they'd had a bet and she'd lost. It was about something stupid, she remembered that at least.

"Since I'm the winner, here's my prize- I get to have you whenever I want, wherever I want for one full day," he'd said triumphantly. He'd grinned at her, his eyes dark with lust and arousal and anticipation. "Alright then, when?" she'd responded stiffly, trying to think past the dull heat rising in her stomach.

He'd pulled her close to him, and pressed a soft kiss against her neck, her breath hitching softly at the touch of his lips. "That's the fun part," he murmured into her skin, "You'll never know when." And then he let her go and left her there with a pounding heart and a smoldering body and that was the end of the discussion.

Of course he would pick the absolute worst time and place to use his 'let's fuck!' coupon.

Not that it was a bad thing, necessarily, but still. There was a time and place for these things. Like... maybe literally anywhere else.

But a bet is a bet, right?

She let out a strangled groan as he hiked up her skirt roughly, the fabric nearly tearing, and pressed a finger against her panties. "Gotta be careful," he whispered, and she gasped as his fingers moved more insistently against her panties, her hips moving in tandem with his hand. One of her arms tightened around his neck and the other gripped the counter fervently, her eyes fluttering closed as her head bumped against the mirror. He pressed his mouth against her jaw, his teeth scraping against and pulling at her tender skin and forcing a shaky inhale out of her.

He smirked at her and breathed, "You can be a little louder than that. I know you can." Somewhere at the back of her mind, she recalled doing something equally as stupid in a public bathroom, and how her fervent moans and his overly vocal encouragement had nearly gotten them both in serious trouble.

This wasn't much better, was it?

"I… I won't," she managed, grinding her hips against his hand as he pulled her damp panties down her legs and tossed them aside. "Damn. If you're still talking, I'm not doing well enough."

"Oh really? What's your goal here, exactly?" she asked him, biting her lip and making a tight strangled noise as his fingers brushed against her clit and sent a bolt of pleasure up her spine. "I want you to feel good," he responded as his fingers pressed against her lightly, and she ground against his fingers desperately, wanting him to go further. He knew exactly what she wanted and swiftly pulled his fingers away so they rested idly against her thigh. She let out a whine at the loss of sensation and dropped her hand down between her legs but he pushed it aside and gripped her wrist tightly so she wouldn't do it again. "But before that, I want you desperate."

She looked him in the eyes, silently challenging him with her smoldering gaze. "If you want me to be desperate, Natsu..." her voice dropped into a low, seductive purr, "you're going to have to make me desperate." He responded with a dark, lustful grin, his eyes alight with hunger. "Fine," he responded. "If that's what you want."

He didn't wait for a response and resumed his fingers' steady movements, and she responded in kind, her hips grinding against his hand almost wildly. The mirror began to fog over. Then he stopped again, but before she could protest, he nudged a finger inside of her. She let out a moan that he managed to quickly muffle, but not before someone knocked on the door. "Hey, Lucy, is that you? Are you alright?"

"Me? I-I'm fine!" she gasped, her voice audibly shaking. Natsu laughed silently as she tried to compose herself and recognize who exactly was talking. "Wait, Juvia? Is that you?"

"Yeah. I've been looking for you- I was wondering where you went. Are you sure you're okay? You sound like you're sick."

"Juvia's here? Now things are interesting," Natsu murmured, and if he wasn't busy between her legs she would have had a half mind to yell at him for that comment. Before she could speak up, though, he eased another finger inside her slick walls, curling them slowly as he watched her reaction in amusement. "I- mmm… I'm…I- oh god…" she frantically tried to clear her head but no words were coming to her when every possible thought, coherent or otherwise, was being drowned out by the hot pleasure coming from between her legs and radiating through her body. "Something isn't... oh god... sitting right, and I- I think it… ahn… might be coming…" her sentence trailed into a soft groan.

He chuckled. "Ha. Coming." She immediately shot him a glare. What was he, fourteen?

"Lucy, are you okay? Are you sick? Do you need help? I can come in to help if you want-"

"No!" Lucy all but yelled, and Natsu finally stopped, startled at her outburst, giving her a precious moment to think. "I-I'm really okay…" she said, trying not to stutter. "I-I'll be out in a few minutes."

"Oh… okay then…" Juvia was clearly having suspicions about what was really going on. "Would someone happen to... be in there with you?" she asked, and Natsu looked up at her, steadily holding her gaze as he slowly worked a third finger inside her. She squeezed her eyes shut and took a deep breath for composure before saying, "Yes," but was met with silence.

"Who's in there with you?" Juvia asked curiously, and Natsu smirked at her. "Yeah, who's with you?" he repeated quietly.

I swear to God-

He was the only person on Earth who could actively infuriate her and turn her on at the same time. "They're- they're a friend..." Lucy groaned, barely managing to get the words out before Natsu covered her mouth to muffle her gasp of pleasure.

"Something tells me we're more than friends," he murmured, his overactive fingers stifling any replies.

Juvia still seemed skeptical. "Are you... are you sure?" she asked.

What kind of question was that?

Lucy pushed Natsu's hand aside. "Y- mm, yes, oh sh-" Natsu muffled her again before she exposed them both, and just in time, too. Juvia gave up and accepted it and said, "Okay, well, if you, uh, need anything... just, um, yell."

"Mmm, w-will do!" she cried and silently thanked every being in heaven and on earth that she was gone.

"You handled that so well," he said after she was gone. "R-really? Mmmm..." His fingers twisted around inside her body, every movement seemingly done in an attempt to make her scream while simultaneously silencing any potential response she might have had. "Ah... ohgodohgodohgod, keep going..." She circled her hips as his fingers twisted and curled inside her.

With every move and twitch of his fingers, her lower stomach grew hotter and tighter, the tension becoming almost painful. She arched into him, her eyes squeezed shut, her arms gripping his shoulders tightly as he kept going as she wished. "Ah, I'm so close-" she managed and he smirked but didn't say anything in response.

She ground her hips against his hand as he moved quicker and with more urgency, beginning to feel that desperate yearning for her orgasm once more. With a final stroke, she gasped as she felt the bundle in her stomach snap and burst. Gritting her teeth, she rode out the waves of fiery, sparking pleasure against his hand before slowly opening her eyes with a heavy sigh, still panting.

"That wasn't too bad, was it?" he asked, and she chuckled. "It wasn't terrible," she responded coyly, "but I probably could have done better."

He scoffed as he slowly pulled his fingers out of her and sucked the fluid off them, smirking at her expression. "We both know that's not true." She gave him a satisfied smile. "No comment."

In celebration of the holiday season, here's this lovely thing that's been sitting in my drafts for a long time. It was actually way longer but I cut out all the story that came with it because... well, you know what you came here for. This a nontraditional one (gasp) so that's cool, I guess. There's more on the way, I promise!

I hope you enjoyed reading it as much as I enjoyed writing it!