Scientific Theory

Jun 26, 2008 20:42

Title: Scientific Theory
Author: Persiflage_1
Characters/Pairings: Martha/Ten
Rating: NC-17
Spoilers: The Lazarus Experiment
Summary: The Doctor discovers something interesting about his companion.
Disclaimer: I don't even own my brain any more, never mind Doctor Who!
Link: < a href="http://persiflage-1.livejournal.com/129604.html">Scientific Theory by < lj user=persiflage_1> (Characters: Martha/Ten | Rating: NC-17 | Spoilers: 3.06)

Author Notes: I wrote this for the kinkmeme over on sizeofthatthing where the prompt was "Ten/Martha: geek!sex, glasses fetish, science!geek fetish, sapiosexuality".

~~~~~~

It started after the Lazarus business.

"That means Lazarus has changed his own molecular patterns," Martha commented to the Doctor as they looked at the screen.

"Hypersonic sound waves to destabilize the cell structure, then a mutagenic program to manipulate the coding in the protein strands. Basically, he hacked into his own genes and instructed them to rejuvenate." The Time Lord glanced sidelong at his companion, noting her shiver and that her breathing had speeded up a little. He wondered why: she didn't seem afraid, if anything she was excited.

Martha struggled to concentrate: she didn't want him to know that he was turning her on with his words. As Tish had commented, she liked geeks, and she had thought earlier that he looked sexy as hell in that tux, but then he put on his glasses and started talking science, and she felt as if her insides would melt.

Later, once they were back on board the TARDIS again, the Doctor moved the ship into the Vortex and suggested they take a bit of time to unwind after dealing with Lazarus.

"Let's have some tea," he suggested. "A superheated infusion of free radicals and tannin always does a body good." He looked over at Martha and paused. "Are you okay?"

She nodded, biting her bottom lip to stop herself whimpering. The Doctor crossed to the Captain's chair, which she was leaning against, and put his arms around her.

"Sorry, I'm babbling on, and you barely escaped from Lazarus with your life."

"It's - it's not that," she whispered.

He pulled back a little and looked down into her flushed face, noting that she was breathing heavily. "What is it then?"

His voice was soft and gentle, and she was very tempted to tell him, but she couldn't quite bring herself to, so she shook her head instead.

He gave her a thoughtful look. "Come on. You need some rest, why don't you get into your pyjamas and I'll get you a drink?"

She nodded and allowed him to lead her back to her room, her hand clasped in his. She hoped that he'd get her a drink and then leave her to rest, so that she could have a bit of 'personal time'.

When they reached Martha's room, the Doctor put his hands on her shoulders and kissed the top of her head. "Thanks for your help tonight."

"You're welcome." She willed him away, knowing that the sooner he went and fetched the drink, the sooner she would be alone again.

"Do you want tea? Or some hot chocolate?"

"Hot chocolate would be nice," she answered.

"Okay. Back shortly."

Martha changed into her pyjamas quickly, then got into bed, wanting to put as many physical barriers between her body and the Doctor as possible.

He returned a few minutes later carrying a mug of hot chocolate and a bag of marshmallows, which he handed her with a grin.

"Here we are then!" he said cheerily. "Hot chocolate and marshmallows - just what the Doctor ordered." He gave her a big, beaming grin, clearly amused by his joke, and she grinned back as she accepted the mug, trying not to start or shiver when his fingers brushed against hers as he pulled his hand away.

She blew on the drink, waiting for him to go away, but he settled against the foot of her bed and started rubbing her toes through the bedding.

"What are you doing?" she asked, hoping her voice was steadier than it felt.

"Aren't your feet aching from running about in those shoes of yours?" he asked. "'cos nice as those shoes were, they're not exactly designed for running, like mine are."

"Well, yeah, a bit," Martha admitted reluctantly.

"Thought so."

He moved the bedding aside, then lifted her feet into his lap and began massaging one; she couldn't help sighing a little as his slender fingers worked into the muscles of her foot. Her eyes closed, so she missed the Doctor's smirk as he massaged her foot. He'd been making the hot chocolate for her when his brain had finally caught up with the rest of his senses and he'd realised that she had been aroused earlier. He put her right foot down and picked up the left, watching as Martha's head fell back against the headboard behind her. He could see her pulse in her neck and noted that her heart rate had increased; she was also breathing more quickly and shallowly than before.

He finished massaging her other foot, then began caressing her ankles, and she lifted her head and looked at him, a heated gaze that caused a stirring in his loins.

"Doctor?"

"Shush," he said softly, leaning forward and sliding his hands further up her legs inside her pyjamas. He reached the backs of her knees and stroked the sensitive skin there, causing her to make a soft whimpering noise.

"Yes, I thought you'd like that," he said, his voice still soft, a seductive smile on his face as he looked at her. He pulled his hands from under her pyjamas and slid them up from her knees to her thighs.

"Doc-doctor," she stuttered with a little gasp. "What - "

Before she could finish her question he leaned even further forward and carefully brushed his lips across hers.

"Oh!"

"All right?" he asked as he pulled back.

"Oh yes!" She reached up and curled a hand around the back of his neck, pulling his head back towards hers and they kissed properly: a slow, sensuous kiss, their tongues exploring each other's mouths carefully.

The Doctor unbuttoned Martha's pyjama top as they kissed, then cupped her breasts in his hands, stroking the sides with his fingertips; she started and shivered at his touch, and he smiled against her mouth, then thumbed her nipples.

"Ah!" She pulled away from him, gasping for air. "Sneaky," she remonstrated.

"Always," he answered, smirking.

"I think you're wearing too many clothes, Mr Smith."

"You're not wrong, Miss Jones." He pulled back and began to strip, his movements urgent and hasty.

Martha couldn't help admiring his body once he was naked: true, he was skinny, but she knew for a fact that he was strong, and she presumed that two hearts meant he had more stamina than a human.

"Put your glasses on," she said suddenly as the Doctor was about to remove her pyjama trousers.

He quirked an eyebrow at her. "Why?"

She rolled her eyes at him. "Because you look bloody sexy in them, why do you think?"

"Oh, so you've a glasses fetish, have you?" he teased as he picked his jacket up from the floor and pulled them out of a pocket.

"Maybe."

"Or is it a geek fetish?" he asked as he began to tug her trousers off.

She lifted her bottom. "Science geeks are sexy," she said, blushing slightly.

"Yeah?"

"Yeah." She looked a little defiant and he grinned at her, peering over the top of his glasses as he dropped her trousers onto the floor, then gently parted her legs.

"So you were excited, earlier, when we were in the lab and I was telling you what had happened to Lazarus' DNA?" He stroked his thumbs across her inner thighs and she sighed.

"Yeah," she answered dreamily.

He smirked. "And if I said to you I was going to reverse the polarity of the neutron flow?"

She gave him a hazy look. "Nice," she murmured.

He ducked down and drew his tongue up the length of her sex, feeling her shiver under his touch. "In physics, the law of conservation of energy states that the total amount of energy in any isolated system remains constant but cannot be recreated, although it may change forms, e.g. friction turns kinetic energy into thermal energy."

He looked up from between her legs. "Which means, that if I apply sufficient friction, you'll get hot."

"'m hot already," she murmured, and the Doctor could see that her skin was flushed.

"I'm going to make you hotter," he assured her, before lowering his head again and drawing his tongue up her sex again, then circling it around her clit, without actually touching it.

"And then there's the one that says 'to every action there is an equal and opposite reaction.'" He followed this remark up by nipping at her skin, and smirked when her hips jerked upwards.

He looked up at her again, peering over the top of his glasses.

"Bastard," she said, without emphasis.

His smirk widened into an outright grin. "And what about the one that goes 'A physical body will remain at rest, or continue to move at a constant velocity along a straight path, unless an external net force acts upon it.'?" He pushed a finger into her wetness and she gasped, her hips bucking upwards more strongly this time.

He added a second finger and began to thrust them hard and deep, causing Martha to groan and writhe. He brought his mouth back down to her clit and began to suck in time to his finger thrusts, and she whimpered and moaned, her body thrashing about in the bed as she clutched the sheet beneath her in a white knuckle grip.

It wasn't long before she came hard, her muscles clenching tightly around his fingers as she flooded his mouth and hand with her juices, which he lapped up. Then he slid his fingers free and crawled up her body, offering her his hand. She clasped his wrist firmly and sucked his fingers clean, swirling her tongue around each one in a sensuous manner that made him groan in turn, his cock pressing hard against her body.

"Now fuck me," she said after she released his finger with a wet pop.

He gave her a manic grin, then guided his erection into her heat. As he began to thrust he recited further scientific laws, before beginning on Einstein's Theories of General and Special Relativity. Martha moaned and whimpered and writhed before she came, harder than before, then when she'd caught her breath, she began reciting Pi to him and it wasn't long before she felt his cock pulsing as he spent himself inside her.

"I do believe that's the geekiest sex I've ever had," he remarked once he'd managed to catch his breath again.

"Me too," she answered, grinning like the Cheshire Cat.

fic genre: pr0n, character pairing: ten/martha, fic: s3

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