Rodney twitched where he was sitting on the bed, glancing at the door before returning his attention to his last six chess pieces.

She was still smiling at him.

In fact, Calypso hadn't stopped smiling at him since she had pulled him into her room, stripped him of his lab coat, and pushed him down onto the bed next to the chess set, which had wobbled dangerously. It vaguely reminded Rodney of the spider's parlor. And she was the spider. It was only a matter of time until she tied him up and started sucking his…hey! Get those thoughts out of there! What is the matter with you? This is your best friend's sister!

"You gonna move any time soon?" Calypso drawled, interrupting his daze. He glanced at her, but only long enough to see that she was amused; like she could read every dirty thought he was having – oh god, wasn't that frightening – because any longer and he'd be staring at her towel, thinking more dirty thoughts.

"I'm thinking," he snapped, and she snorted.

"Uh huh," she replied, propping her chin up on her fist. Rodney twitched again. How she did that without losing the whole towel… "Thinking about what, exactly?" she asked, and his head jerked up, alarm written on his face. She smirked. "'Cause it isn't chess. You only have one move to make," she told him, and he flushed.

That much was true. Her pieces had cornered his pieces so that any move he made would sacrifice a piece, but only one move would save his king from annihilation. He made that move, losing his last bishop, which put him into checkmate. Cal chuckled and got up, leaving the good doctor to stare at the chessboard.

Rodney twitched, this time not because he was nervous.

Rodney and Calypso had been locked in a chess battle for almost three hours. Out of the ten games they played, Calypso had won half, a phenomenon that he had rarely encountered after the age of ten.

Of course, it probably helped her game that most of the blood that usually ran his brain had flown south for vacation, and he could barely think with the woman sitting almost entirely naked only three feet in front of him. She was probably using that to her advantage. In any case, Rodney McKay was on edge. Nervous that any second her brother would bust down the door despite his casual blessing of 'just don't tell me about it', frustrated at having his concentration so easily shattered, and horny; possibly more so than he'd ever been in his entire life, outside the long, lonely stretch of high school.

"Wanna play again?"

Rodney looked up with the intention of declining and returning to his room for some quality time with Mrs. Rosy Palm and her five friends, but the words 'no thanks' died on his lips when he looked at her.

He was right, she lacked modesty.

She had untucked the only part of the towel that was keeping it in place and let it fall to the floor where it lay in a dejected heap. Rodney gritted his teeth to keep a sympathetic moan from passing his lips as she opened the top drawer of her dresser and pulled out a faded pair of pink pajamas.

She was naked for a glorious forty-seven and a half seconds, and now Rodney was almost painfully hard.

He really, really had to get out of there, before he did something stupid.

It occurred to him (in the back of his mind, where there wasn't enough blood to carry the thought to the foreground) that she might be flirting, possibly had been flirting since she had arrived, but really, flirting was probably her default setting, from what he'd seen around the city. She smiled at everyone she talked to, and she leaned, almost as much as her brother did, which was only enhanced by her natural feminine charms.

She settled on the bed in front of him, her dark chocolate gaze direct and disarming, and he blinked twice before setting his pieces back up, ignoring that his face was red, and really, how on earth did he have enough blood left in his face to blush?

Not to imply that he was really well endowed, or anything…

Damn it! Stop thinking like that!

His pieces were set up and he looked at Cal to see that she was fondling her King.

Which sounds obscene, and looks it too.

It may have been accurate to say that Rodney's eyes were bugging out of his head, and he coughed, trying to focus on the chess board.

"Cal," he said, and she smirked.

"Yes, Rodney," she answered, in a purposely breathy and 'I want you' sort of voice. Rodney twitched again, breath hitching. It may have been possible that he whimpered, but he'd never admit it.

God, please, stop making her obscenely hot.

"You're white," he told her, and she giggled.

"Yeah?" she asked, and this momentarily distracted him from his arousal, long enough for him to roll his eyes and stare at her reproachfully.

"Cute," he snapped, and she laughed, which knocked the annoyance right out of him, because god, how extremely unfair is it that even her laugh is hot? Desperately, he tried to force his attention to the chess board. "White makes the first move, Cal," he added, and then mentally kicked himself. Oh lord, why? Her predatory grin was back, and her eyes lit up like Christmas.

"If you say so," she replied, dropping the chess piece and leaning forward. Rodney stared at her, leaning back slightly and then jerking in surprise as she placed her hands on his thighs, a little over five inches from the part of him that was really, really interested in these proceedings. His surprise landed his hands on top of hers, which she smirked at and brought her face very close to his. He vaguely noted that he was panting, but he really couldn't help it, not even to wipe the smug look off her face. "Fair warning: I'm going to kiss you now," she told him, and he made an indistinct choking noise as her hands squeezed where they had landed.

"And I may faint," he replied, through no really clear decision of his brain to do so. And he so didn't care, because she was smiling and dear god it was so unfair how beautiful she was.

And then her lips were touching his and his train of thought derailed completely. The tracks were crooked and there was a bomb, and right now, the helicopters were circling looking for survivors.

His hands moved up her arms, up to her petit shoulders, which fit just perfectly in his hands as he leaned into the kiss, tilting his head to get better access. She growled into his mouth, shifting forward on the bed and—

—a sharp crash made them jump, and then looked at the chessboard, which was on the floor, amidst the scattered pieces of crafted plastic. One of the bishops had been beheaded. Cal looked at Rodney, a chunk of bangs falling over one eye, and giggled before leaning forward again.

Rodney started to lean forward too, not really all that concerned with the chess set, but then one thought climbed out of the train wreck and started jumping up and down, waving its arms, and he stopped, holding her back.

"I can't," he blurted, and she blinked.

"Pardon?" she asked, confused, and he gently pushed her back until she was once again sitting on her side of the bed, looking bewildered.

"I, uh – I just remembered that I have a mission briefing tomorrow," he checked his watch, "today. Later, and I really need to get some sleep, and I have to go, because, um…" he grasped at a way to explain it tactfully. "Well, I, um… I should go." he said, standing up. He stared at the way her face was suddenly red, and then blushed himself, grabbing his lab coat from where she'd dropped it and holding it in front of him, coughing.

"Wow, Rodney," she breathed, looking up at him with darkened eyes. His face turned even more red as she got up, prowling towards him. "You should stay," she said, nodding, and he backed up towards the door.

"I really shouldn't. Not that I don't want to—" he babbled, and really, how could he not? She was in full sex-predator mode, and wow, that was hot. "Boy, do I want to. That is—um, I left something on in the lab that I really should take care of—oomph…" he looked at the door that he was backed up against, and then back at Calypso, who was staring at him in a way that was reminiscent of a wolf and a piece of meat. "Um…"

"I'll make sure you get enough sleep, Rodney," she promised, and he whimpered.

"No, see, I need to be very well rested, and I really don't think that staying wou-mmmph!"

His eyes slammed shut, and his hands switched to automatic, gripping Cal's waist as she strip searched his mouth.

There was an alarm in his head that was ringing. A warning that he should either get out of there or get naked soon, or nothing was going to happen.

With Herculean effort, he pushed her back (gently, he wasn't trying to hurt her), and babbled something incoherent before opening the door and stumbling out into the hall, fleeing.

Calypso looked up at her door from where she had tripped and fallen on her butt, and licked her lips thoughtfully.

This wasn't over.