Prompt: One character (A) goes to the gym to impress the character B, but B doesn't know it's for him/her and thinks it's for someone else. Jealousy appears and they realize theirs feelings

...

He was admiring himself in the mirror when he noticed a familiar face walk through the doors of the gym. She was wearing a green, fitted tank-top and dark brown yoga pants, her thick hair tied into a lazy bun at the base of her neck. In her arm was a yoga mat and a small grin played at the corner of her lips. Her eyes stared blindly forward and his sister was at her side, a hand grasping her elbow.

What the hell was Toph doing here? With his sister?

Sokka left his place on the bench and marched toward his sister and Toph. "What are you two doing here?" he demanded.

Katara opened her mouth to answer, but Toph beat her to the punch. "We're here to get fit, of course. Bikini season's comin' up soon, y'know," she snorted.

"We have the right to be here just as well as you do, Sokka," Katara said pointedly, scowling up at him. "Stop acting so defensive. We didn't come here to spy on you. This gym is big enough for the three of us."

With a sigh, Sokka nodded, silently agreeing with his sister. Of course they both had the right to work out here; he just found it odd that they decided to come here, where most of the inhabitants were sweaty men with too much testosterone. Maybe, a voice pointed out in his head, that was why they wanted to come here. Sokka shook the thought away; Toph couldn't see any of the men and Katara had Aang.

"I know, sis," he relented. "'S just odd to see you two here. You usually do yoga at your place and the only exercising Toph does is with her mouth."

"You got that right, Snoozles," Toph teased, arching an eyebrow.

Realizing the innuendo in his words, Sokka blushed and stammered, "T-toph, that's not what I meant."

"Sure thing." Grin still intact, Toph jabbed Katara with her elbow. "Let's stop jabberin' and start exercisin', Sugarqueen."

Grunting her disapproval of Toph's aggressive methods, Katara rolled her eyes and led the two of them beside the bench Sokka had previously been on. He followed, his eyes watching Toph as she walked before him. There was a certain swagger to her walk; she was confident with her head held high, a permanent grin etched upon her face, and her back straight. He watched as Katara placed their mats on the ground and guided Toph towards her mat.

Shaking his head, Sokka walked back to his bench. He didn't want to admit it, but working out in front of Toph and Katara – well, Katara – made him a bit anxious. This was his environment, his safe place when he wanted somewhere to cool down and just let his emotions go for a while. Although he would never admit it to them, their appearance was a bit of an intrusion in his mind, but it wasn't like he could just tell them to leave. Toph would kick his ass.

Closing his eyes, Sokka leaned back and inhaled deeply, hands poised on either side of the weight bar when he heard a loud commotion and made a sound of impatience. He recognized the voices (they were regulars here) and popped up once again, turned to glare daggers at the group of guys walking through the doors, laughing and being unnecessarily loud as they dropped their bags and began dispersing to different machines. One in particular, with shaggy brown hair and a friendly smile, stopped and glanced in the direction of Toph and Katara. Toph, at the moment, was bent over, her palms splayed out before her on the mat, her rear in the air.

Sokka bristled.

"Toph? Is that you?" the guy called, amusement flickering across his face as he walked towards Toph.

Toph straightened and turned, smirking. "The one and only," she answered. "Did you really recognize me by my ass, Duke?"

Duke – what kind of name was that? – lifted his hand to his hair and turned his face, trying to contain his blush. "It's The Duke," he said finally. "And…no, I just…recognized you."

"Mmhmm." Toph crossed her arms. "Sure. I'll take your word for it."

Sokka watched the exchange with growing interest – and irritation. Who was this guy and why wasn't he aware of his relationship with Toph? "So, what brings you here?" The Duke asked in a desperate attempt at conversation. Sokka snorted.

"Ah, just wanted to get fit and healthy and all," Toph answered, stretching to and fro, her cleavage pushing out of her tank-top. Was she trying to impress The Duke? Is that why she was here? Why the hell would she want to do that? Katara rolled her eyes behind Toph and gave Sokka a pointed look, as if she expected him to do something about Toph's escapade. He just shrugged and gestured toward The Duke furiously, demanding answers. Katara gave him another look before shrugging with a sigh.

What the hell kind of look was that? Katara had a special way of making him feel stupid.

He huffed and turned his attention from Toph and The Duke. Nothing was going to ruin his work-out today – nothing. Toph's voice was not distracting him and her teasing laughs aimed at The Duke did not set him on edge. Nope, Sokka was perfectly content. He didn't care at all. As a matter of fact, Toph could talk to The Duke during their whole work-out session and it wouldn't bother him.

A few minutes later, though, when he overheard them saying parting words, he was relieved.

It was only because they were distracting, he consoled himself. That was it.

"Hmmm…" Toph's voice carried towards him. "I think I'd like to try some lifting. Maybe someone could help me?" Her tone was pointed, he noticed, as if she expected a certain someone to help her. Probably The Duke.

Sure enough, he came to Toph's rescue. Sokka watched out of the corner of his eye as The Duke grasped Toph's elbow and led her toward the bench beside him, causing a flare of irritation to put a damper on his mood. Why did it matter, though? He was just helping Toph, Sokka told himself. Nothing more.

But then Toph was lying down and The Duke placed his hands on her hips, guiding her towards the headrest.

Something tightened with his chest at the sight. She was his best friend, for Christ's sake, and no one had the right to put their hands on her. Not like that, not in public. Maybe he was being a bit dramatic – and he probably was – but Sokka was struck with the thought that he didn't want The Duke, or anyone's, hands on Toph. The possessive urge both shocked and scared the hell out of him. Where did these feelings come from?

He stood from his bench and moved towards Toph's, moving to the opposite side of The Duke. "All right," he said, his voice firm. "I've got things from here. You can go on and do your thing over there." Away from Toph, was unsaid, but Sokka hoped his eyes conveyed his thoughts. The Duke look startled for a moment, then conflicted, before he nodded finally and stepped back.

"The hell was that, Snoozles?" Toph asked lightly, an eyebrow raised as he looked down at her.

"Nothin'," he answered shortly, suddenly unsure of what he was doing, exactly. The Duke had been successfully run off and now Sokka had Toph to himself – what was there to do next? The tightness in his chest change to something else and he finally asked, "So. Is he why you came here?"

Her eyebrows furrowed in confusion. "Who? The Duke?"

"Yeah," Sokka answered thickly, unsure if he wanted the answer. And he had no idea why he was so unsure. "Did you…y'know, come here to show off in front of him or somethin'."

Toph laughed, flashing him a beaming smile before she curled her fist and reached out to punch his thigh. "No, stupid," she answered. "I came here to…impress someone else."

"Who?" he demanded suddenly, blue eyes darting sharply across the room in search of anyone Toph might know, aside from The Duke and Katara.

"And I'm the blind one…" Toph muttered with a sigh. She rose and reached out, feeling for his arms and Sokka obliged her in confusion. Her hands grasped his as she stood. They were close now, with her forehead just below his chin. She tilted her head up and he could feel her breath on him. Her lips looked soft and he idly wondered what they would feel like against his own before pushing the thought away. This was his best friend, he would never –

"Oomph!"

With a swift jerk, Toph brought his lips down to her own. It was a clumsy kiss at first, as she found his and brought them to her own. But then it became something else; soft, then hard, light, then passionate. He breathed her in and reveled in the feel of her body pressed against his, her lips commanding his own.

Abruptly, she pulled away, her cheeks tinted and lips swollen. Sokka thought that maybe he heard Katara tsk them behind him and some of the other guys hoot and cheer him on, but the only person he was focused on was before him. She was smiling and he found himself mirroring her, his lips moving into a beaming smile.

"Well, Snoozles," she said finally, her voice slightly breathless. "Are you impressed?"