Jemma watched, entranced, as Fitz dragged his zipper down so slowly it felt like she could hear the individual teeth click. Looking up to his face, she saw a shyness there that she wanted to both preserve and erase. For a moment, she remembered how he'd looked in that first chem lab at the Academy, all awkward and gangly with his hands in his pockets and his shoulders up around his ears. He didn't look like that now, and from where she was lying, he had no need to be shy. She bit her lip hard, scraping it between her teeth until it popped free and then capturing it again. Her hips moved in small circles, searching for the pressure that had felt so good and she squeezed her thighs tighter around him as he knelt between her legs.

"Do mine," she whispered when his fingers stilled and his waistband sagged open. Her hands reached out and grazed along his forearms to his wrists, and she tugged his hands towards her. "Please?" she begged and looked up into his eyes. There was something there that she couldn't quite place, a fragile need that made her heart squeeze inside her chest and her breath catch in her throat. She didn't know what it meant, but it sparked a glow in her that lit up her smile.

She had the kind of smile that was infectious and he couldn't help but return it, especially since she was guiding his hands to the button on her jeans. Leaning down, he kissed her stomach, sucking the smooth skin into his mouth and tickling it with his tongue. He loved the way it moved as the laughter burbled out of her and then rose and fell with a sigh. His scalp tingled as her fingers pushed their way into his hair again, and then he was being pulled up higher and it was his turn to sigh.

Her back arched up as his lips closed around her nipple. She'd been waiting for this for what felt like years, and it made her whole body pulse with excitement. All of her attention focused onto that one perfect spot where his mouth opened and closed around her, sucking her into him and teasing her with his tongue. When he caught her nipple between his lips and gently pulled, she panted out a curse. And when he moved over to do the same thing to her other breast, the curse was replaced with his name.

Releasing her breast with one last peck on the tip, he kissed down her stomach once more, his hands splayed out across her hips and the tips of his fingers teasing her skin with tiny strokes. Placing one last kiss just above the button on her jeans, he looked up at her along the expanse of her body and gave her a wicked grin. If you'd asked him ten years ago whether he'd ever get into Jemma Simmons' pants, he'd have laughed and called you a foolish cunt. If you'd asked him ten months ago, he'd have rolled his eyes and said something sarcastic along the lines of, "We're just friends!'" If you'd asked him ten hours ago, he'd have denied ever even considering the possibility. It's funny how, sometimes, the wishes you don't even dare to make can still come true.

Her breaths were already coming in shaky bursts, but when she saw the glint in his eyes and that roguish smile, she couldn't help but shiver. His fingertips burned hot against her skin as they dipped below the waistband of her jeans and then those clever fingers twisted slightly and the button popped open. Her hands clenched tightly in the blankets underneath her and she moaned with need. His eyes were too intense for her to look at, but too mesmerizing for her to look away. They burned just as hot as his hands and made her shiver as much as his mouth.

He knelt between her legs once more and reached down to cup her ass. Sliding his hands under her thighs, he gripped them tight and then pulled them up, arching her back and resting her on his bent knees. His left hand curled around her hip as his right hand moved to her zipper and grasped the tab between his thumb and the side of his index finger. Watching her face carefully, he dragged the zipper down, down, down, the backs of his fingers rubbing against her all the way. When he finally finished, he pressed his whole hand against her and moaned when she pushed her hips back against it.

Panting and desperate and needing him close again, she clawed at his arms to bring him back down. Her mewls of want turned into a gasp of surprise when, instead of leaning down to press into her again, he pulled her up once more. The way he had her balanced on his thighs pulled her right up against his hard cock as she sat up, and they both groaned at the contact, hips thrusting against each other.

She attacked his mouth with hers again, breathing him in and swallowing his moans. Their kiss was deep and messy and never stopped moving, each one trying to taste as much of the other as possible. She clutched at his shoulders, his back, his hair, and his hips doing everything she could to pull him nearer. His hands moved constantly from her hair to her shoulders, down her back to her ass, and they squeezed her against him until neither of them could breathe.

Her hips moved in a rhythm she couldn't control, and the combination of feeling his hard cock against her and the seam of her jeans pressing in just the right spot had her moments away from losing it entirely.

"Fitz," she panted, and her gasps had him clenching his jaw and fighting for control. His arms flexed tight around her and then he was pushing her back to the bed again.

The weight of him on top of her was almost what she wanted. She was so close. "I need," she whispered in a voice filled with desperation, and she clutched at his back and his neck and his shoulders as her legs wrapped around his waist. "I need..."

"Fuck, Jemma," he breathed in her ear and his voice was just as urgent. His hips pistoned against hers and he buried his face in her neck, eyes squeezed shut as he tried in vain to hold on.

Her moans turned into gasps and her gasps turned into whimpers and her whimpers were cut off as her lungs forgot how to breathe. She clutched at him as her arms and legs contracted, her nails digging into the skin at the back of his neck as her thighs crushed his hips between them. Her eyes squeezed shut so tight she saw starbursts and she pulled his mouth down hard on hers to muffle the scream she wanted to shout at the top of her voice.

His hips stuttered against hers as the sensations took over him. The sweat-slick press of their bodies, the feel of her muscles taught around him, the sound she was making dulled by seal of his lips. He'd been riding the wave since he walked into her room and now he felt it pull him under as her kisses kept him afloat.

Finally, after a moment that passed as quickly as summer storm and as slowly as an ice age, they collapsed, a tangle of arms and legs and sheets. Their laboured breathing was the only sound to be heard.

Gradually lifting himself up from where he lay on top of her, Fitz stared down at her. He wanted to memorize this moment so he would never forget it. He started at her pillow, slightly askew and with her syrup-coloured hair spread out on its cotton pillowcase. He took in the sheets and how they'd swirled and wrinkled on the mattress and the way the blanket was sliding off the bed. Her head was tilted back to look up at him, and her eyelids fluttered with every deep breath she took. Her cheeks were flushed bright pink like she'd just come in from the cold, and her lips were red and full and oh so kissable. He watched her throat as she swallowed, followed its curve to the dip in her collarbone, and then her shoulders. Her breasts he didn't think he'd ever forget, and in this moment they were so perfect they were almost painful to look at. The rise and fall of them as she breathed was hypnotizing. The shape of them designed to fit into his palms. The nipples so hard he wanted to kiss them, lick them, suck on them for approximately the rest of his life. And below that, the pale skin of her stomach dotted here and there with freckles. He wanted to find and kiss each one of them, map them out and discover her constellations.

Jemma moaned in protest when he moved from on top of her and shivered as the sweat cooled on her chest. Reaching out, she wanted to pull him back down, but the way he was studying her made her pause. She was used to Fitz trying to puzzle her out. He'd been doing it since before they'd officially met, and she supposed he'd be doing it until the day they died. She did it herself, she had to admit, but while he worked best by way of laser-like focus, she preferred a more holistic approach that allowed for a balancing of variables, a weighing of options, a consideration of all sides of an issue. She looked up at him as he looked down at her and realized that this was the bit that she'd never figured out. She'd been missing this piece of them the whole damn time.

"So," he said finally, and he had to clear his throat to clear the roughness from his voice.

"So," she agreed, and she couldn't believe how normal she sounded.

"I'm not sure-"

"-tiquette, but-"

"-say after you-"

"-best friend, and-"

"-don't expect-"

"-do it again."

Fitz paused before he could even form his next word. "What?" he asked, in need of clarification.

"Well, I don't know about you," Jemma replied matter-of-factly. "But that was the best sex I've ever had." She grinned up at his stunned expression. "And you haven't even got my jeans off yet."

He blushed and shifted uncomfortably in his own rather messy jeans. "Nor mine," he said wryly.

"So I think it would be a shame if we didn't do it again."

"But what about fraternization...?" he asked, not giving two shits about it, but feeling like Simmons would appreciate his nod to the rules.

"First of all, we're both level 5 agents," she began.

"So?"

"So this," she waved between them, "doesn't compromise the chain of command. Secondly, it doesn't result in partiality," she continued, counting on her fingers.

"Hah! Speak for yourself!" He couldn't believe he was actually enjoying a lecture on regulations. Of course, if she'd been topless during Vaughn's lectures back at the Academy, he probably would have loved those too.

"And third," she said, rolling her eyes good-naturedly, "It won't undermine good order or morale." She leaned up and gave him a quick kiss. "It's fine."

He squinted at her. "You're sure?" he asked, still not convinced.

"This isn't the first time I've thought about it," she said, looking him in the eyes.

He was so flabbergasted by that all he was able to get out was another eloquent, "What?"

"I like to be well-prepared," she said primly. Reaching into her nightstand she pulled out a foil packet. "See?"

Fitz nodded. "One of my favourite things about you," he said enthusiastically. "Always prepared."

- [one week later]-

Fitz paced impatiently outside of the door, his hands jangling by his sides and his face radiating worry. He didn't see why he couldn't be in there with her. Just to, y'know, make sure things were done right.

Another five minutes passed and he was rubbing the back of his neck so hard the skin was red and then finally, finally the door opened and she came back out.

"Well?" he asked explosively.

Jemma smiled and reached out to grab his arm and lower it. "I'm fine," she said, and the tone she used made it sound like it was silly for him to be concerned. As if she hadn't been worried herself before they'd arrived.

Fitz looked behind her at Dr. Kumari, glaring with distrust. "And did he-"

"No," she said, nipping that idea in the bud. "I told you that was... medically inaccurate," she blushed.

"Yeah, but..."

Leaning up on her tiptoes, she kissed his cheek. "But if you stop protesting and get us back to your bunk, I'll let you do it again."

For a split second he looked as if he wanted to argue further, but then he grabbed her hand firmly in his and stalked them both out of the office. They had some preventive medicine to do.

A/N: This is the end of the first fic, but I wrote a sequel that I'll be posting starting tomorrow. I hope you liked it, and thanks for reading :D