A/N: OK, folks, here it is, the final chapter. Thanks for all the lovely reviews and I hope you enjoyed it!

Normally Sherlock exulted in challenges. Taking down Marcus had been incredibly exciting, stimulating his mind and fueling the adrenaline-junkie he'd always been. Khan's challenge, on the other hand? Frustrating. Incredibly frustrating, and not just because Sherlock had been on the verge of orgasm. He could rein in his own responses to sexual stimulation well enough, but coordinating himself with not only Khan but Molly might prove to be more challenging than he even he could manage.

No, he told himself forcefully as he hauled himself to his knees and gazed down at the Empresses' enchanting form. He wouldn't lose this challenge. His keen, Augmented senses and razor-sharp reflexes would stand him in good stead. He would make Molly keen and wail and beg him for release, but he wouldn't give her what she wanted until he heard and saw Khan spill his seed on his own belly. "Yes," he growled as he sunk two fingers deep inside Molly's wet cunt. "Let's begin."

The manacles holding Molly's arms to the ornate metal headboard rattled as she squirmed and twisted under Sherlock's relentless ministrations. He kept one eye on the Emperor, effortlessly compartmentalizing his reactions to two such stimulating sights: Khan's large hand, so similar to his own, lazily stroking his heavy erection, and Molly's face and whines of lust as his own hand worked her to a frenzy.

He timed it perfectly; just as she began to clench around his fingers he pulled them out of her body, idly licking her juices as she gave a sharp yelp of frustration. He slipped his fingers back into as she glowered at him, the glower turning to a satisfied smile and back again as he removed the digits without doing more than slicking them further. Then he grinned and turned to Khan, wordlessly holding his hand above the Emperor's plush lips, the grin deepening as the other man opened his mouth and sucked the offered nectar, pulling Sherlock's fingers deep into his mouth and twirling his tongue until every delicious drop had been taken in.

"Fuck her, Sherlock," Khan purred when the other man had pulled his fingers away. "I want to watch you, both of you." He gave a strong pull on his cock as he spoke, locking his gaze with Sherlock's. "Let's make my sweet Molly scream, shall we?"

Sherlock gave an answering smirk as returned his attention to the Empress. She was staring hungrily up at him, perfect white teeth nibbling at her bottom lip, breasts jutting up as she arched her back, legs splayed and her pink cunt on perfect display for him. She showed no signs of discomfort from her bonds, arms stretched over her head, hair loose and spread over the silken pillows on which she reclined. He took a handful of her hair, tugging it over her shoulder so that his fist rested just under her chin, studying her face for a moment. When she smiled up at him, her expression equal parts desire and impatience, he leaned over and kissed her, holding nothing back as he settled between her thighs.

He could feel the heat radiating from her body, especially between her legs where his cock rested in the wiry curls of her pubic hair. He reached down and took himself in hand, balancing easily on his knees as he nuzzled her throat, nipping and licking on the side opposite where Khan had already marked her. He nudged her sopping wet opening with the head of his cock, running it teasingly along her slit, being sure to rub her clit a few times and thoroughly enjoying her gasps and moans of pleasure.

Speaking of moans…he lifted his head and glanced over at Khan, whose eyes had glazed over as a fine sweat broke on his brow. He was still pulling steadily at his cock, one knee lifted and his other leg lying straight on the bed as he reached over and squeezed Sherlock's ass, running his fingers lightly along his pleasantly sore opening. "Make her scream," he said hoarsely, pinching Sherlock to remind him of the task to which he'd been set.

Molly obligingly moved one leg so that she now mirrored her husband's position, and Sherlock took immediate advantage to plunge deep inside her. Once he was fully seated he wasted no time in setting a punishing pace, twisting her hair round his fist and yanking her face up to his for an equally punishing kiss. She was so soft and warm, her firm breasts pressing against his chest, her cunt clenching around his cock as she shifted her hips and wrapped her legs around his waist. He loved the taste and feel and smell of her – of both his new sexual partners – and spared a fraction of his concentration to wonder if it might last longer than this night. Once the evidence against Marcus had been confirmed, he and his friends and followers might actually be allowed to live their own lives.

Then Khan reached over and smacked him on the ass, hard, forcing his attention back to the moment at hand. The Emperor was close, so very close; Sherlock slowed his movements fractionally, listening as Molly's moans increased in volume with every thrust. He lowered his head and took her right nipple into his mouth, rolling it around his tongue and then nipping at it as he heard Khan's grunts of pleasure turn into a low, whining moan, signifying that he'd reached his orgasm. Molly was next, nearly screaming with pleasure as Sherlock once again increased his pace, pistoning against her while the sweat coated their bodies and plastered his curls to his forehead.

He came with a shout as Khan suddenly forced two fingers into his opening, slicked with his own fluids, which still coated his hand and belly. Sherlock shuddered and gasped with his forehead pressed to Molly's collarbone as Khan rose to his knees, then leaned down to press a deep kiss to his wife's lips.

After he'd undone her bonds, the three of them lounged on the massive bed, still naked and temporarily sated. Servants were summoned to bring food and more wine, and Commander Donovan appeared after they'd eaten to inform the Emperor that it appeared that Sherlock had been telling the truth: confronted with the evidence of his perfidy – and after an 'encouraging' session in the Agony Booth – Marcus had confessed.

That was a relief to Sherlock, although he remained stoic at the news. He and his people still faced an uncertain future, but a least they wouldn't be forced to dance to the will of a mere human who'd gotten lucky. It was just as likely Khan would use them as ruthlessly as the former Admiral, but Sherlock could live with that possibility.

And who knew? Perhaps one day, he thought as the Empress nipped at his throat and palmed his erection while the Emperor drew him in for a scorching kiss, the opportunity would arise for his original Augments to supplant those who had come after.

After all, that was the way things worked, in this world and the one he'd left behind.

Sighing with pleasure at both the physical sensations being elicited by his newest set of lovers and the thought of what the future might hold, he sank into their embraces and allowed himself to be lost in the carnality of the moment.