Shepard almost ceased to notice everything around her, lost her vigilance, closed her eyes and surrendered to the gushed feelings. Therefore it became a surprise for her when someone's hand pulled her hair with a strong grasp, forsing to break off a kiss.
Another Leng's hand seized her wrist and now he victoriously looked at her.
"Tsk-tsk," he shook his head. "What a carelessness and self-confidence, Shepard... Did you really think that these pity handcuffs will stop me? Or after ressurection your brain was moved to your vagina?"
He expected to see a fright in her gaze or confusion at least, but there were only impudent, mad sparks flashed in her eyes. Perhaps exactly this way she looked when she took the reckless, but after all effective decisions?
"Not really," she grinned without trying to escape his steel grip. "I just know when a he-dog approaches behind not just to bite."
Leng blinked, narrowly looking at her. "Probably, that's why some people consider you the biggest bitch in a galaxy."
She didn't manage to answer as sudden strong biotic throw threw her for a couple of meters back towards a bed. Shepard landed on it, hitting with a top of a head at hard headboard. But she quickly recovered after a blow and drew herself together, observing as Leng threw aside a table blocking his way along with her gun. Her hand reached to a bedside table, hoping to find any cold weapon, but it was also thrown to the opposite wall.
"Shepard, are you going to change the rules of our game?" he slowly came closer to her, enjoying how she ended up driven into a corner. "Because I'm seriously thinking of giving you what you so insisted from me. And then everything between us will end, one way or another."
"What do I see? Mr. Cold-blooded Douchebag flared up? Or you have a hard-on only when you think about killing anybody?"
"You talk too much as for the biggest thorn in mankind flesh," he returned her courtesy and, stopping at a bed, began to remove his armor.
Shepard decided to keep silent, resting on her elbows conveniently and watching a show.

Yes, he was fucking gorgeous. She couldn't deny it. And, probably, everything would be different if not these idiotic circumstances.

Shepard knew about Krios' illness and was ready for the inevitable. She never took a wow of love and eternal fidelity. It was the spiritual and physical union when two persons just found pleasure and peace in their relationship. And both of them always knew that once there will be another man in her life, who can't live without this mad in her own way, desperate woman.
Probably, this man stood before her right now because when she saw him the first time a few hours ago, heard his voice, something disturbingly clicked inside her, warning that this person will play a notable part in her life. Her present carelessness concerning him could seem nonsense, but having learned that he was looking for her, the same gut feeling told Shepard that he is intrigued not less then her. Probably, he will become her death. Probably, she will kill him. But right now it was already a flame which was not easy to extinguish.

His hands could be called a piece of art: balanced interlacing of tight, sculptured muscles and artificial fibers. Bones of a forearm and palms were replaced by artificial ones and strengthened, giving an additional protection and ability of more powerful hits. Any athlete or elite Alliance marine could envy of his torso. And though there were no signs of implants in his chest, it was not necessary to doubt in physical possibilities of this body.
Shepard continued to recline motionlessly on a bed and enjoyed the opened view, nodding approvingly. But she was intrigued even more in what remained hidden under the lower part of his clothes. However, undressed waist-deep, Leng waddled to the next upturned chair, lifted it up, put it opposite to a bed and took a seat, crossing his hands and feet.
"What?" Shepard shrugged.
"Your turn."
"You don't want to help me?" Shepard lifted an eyebrow and sat down on a bed.
"I'm sure, you will handle this perfectly by yourself."
She frowned. "It's a bit strange, don't you think?"
"No," he shrugged. "You didn't help me while I put a show in front of you. So go ahead... and slowly."
"All right," she answered with defiant tone and stood up on her knees. He wanted a show - he'll recieve it.
She slowly pulled up a T-shirt, revealing her flat, sculptured stomach, a slim waist and a breast dressed in a black satiny bra trimmed with laces. Flinging away a T-shirt aside, Shepard rose on a bed and turned back on Leng.
It was completely silly. Being alone without any weapon with the professional killer, who wished to kill her for certain. Moreover she turned her back upon him. These moments could easily become her last ones, but adrenaline seething in her blood only urged her hazard.
Finishing with a fastener of her pants, she slid her thumbs under the belt and pulled it down slowly. The pants clung to her, so she had to swing her hips a few times before the thick fabric slid off her buttocks, hardly covered with non-military underwear. She stood for a moment listening to sounds behind her back, but heard nothing. She began to bend slowly forward, lowering the pants along her shapely and strong legs. Suddenly Shepard heard some wiggle behind her and turned back without changing her position, seeing Leng on the same place with the same impenetrable face, but in a bit different pose. The happy grin slipped on her lips, and she straightened, freeing her ankles from the pants and thowing it toward a T-shirt with her right toe.

She knew how she looks like. A perfect blend of muscles and feminity, with bright impregnations of scars along her backbone. She loved her own body now much more than before the Normandy's crash, and all these scars only served her as a reminder of how expensive the second life is. Perhaps these scars could also frightened off someone, but not the one who was with her now. She was sure about it.
Shepard didn't turn to him. Her hands slipped behind her back and coped with a bra fastener. Thin black straps fell down from naked shoulders, and a bra was thrown away to other clothes. Annoyed with the operative's silence and showing no reaction, she was already going to give him next mordancy, but when she opened a mouth and turned back, she jerked in surprise. Leng stood near a bed right behind her. Her unexpressed phrase turned into a sigh, and when the man's gaze slipped brassily over her almost naked body, she felt a wave of heat inside her.

Leng was obviously satisfied with a view and silently beckoned her with a finger to himself. Shepard grinned and took a step back, shakening the head. He appeared on a bed with one fast jump. Shepard stepped back again, smiling and drilling the operative with burning glance. Two more steps forward. One more step back and a wall behind her.
"That's all," Leng said and stopped in a few inches from her, confirming the fact that there is no place further to go. "But I still don't understand, Shepard: you are either so reckless or so silly."
"And which one would you prefer?" Shepard grinned.
"None of it," he almost growled, and finished the phrase touching her lips with his and embracing her waist.

The world around rushed again head over heels. Tangles of bodies and tongues became even hotter now. But this time it's his tongue penetrated her mouth, and Shepard just tried to win the lost territory, but not too successfully. His hands slid along her back, and then Leng's palm cupped her breast, squeezing it. Without breaking a kiss, Shepard moaned and hasty began to cope with a fastener of his pants. Feeling her stumble, Leng decided to help her this time as the pressure under a firm fabric of his suit became painful already. Releasing himself from trousers and underwear at the same time, he intended to return his attention to Shepard with new eagerness, but she snatched him sharply down, laying him on a bed and pressing down his thorax with her palm.
"I don't like to be hasty," she said, catching her breath. Convinced that Leng isn't going to resist, she stroke her hair up, turned around and looked over his body.

Well, her joke seemed to be only a joke: there was an absolutely normal hard cock instead of some mysterious implants. Shepard was going to make another mock about it, but she changed her mind after all. Sometimes it is better to keep silent, if you do not want to spoil everything. And she didn't intend to spoil for herself a presumably good sex.
But Leng's feet were another matter. Well-formed muscles of his hips intertwined with the artificial sinews closer to a knee, leaving in calves; his knee cups were designed from a tenacious alloy, and his tibial bones most likely were also replaced and strengthened. There were no any skin sites on his feet, and Shepard assumed that they were completely artificial.
"And you agreed for this willingly?" she asked, looking into his eyes.
He eyed her for a few moments with some bewilderment, and then pillowed his head on his hand and sighed.
"You want to try a heart-to-heart discussion with me? Great. The best way to spoil everything."
He tried to stand up, but she stopped him.
"Relax... It's impossible to have a heart-to-heart talks with you," Shepard learned over his face, and her fingers wrapped around his flesh, which already started to lose it's hardness. "Because you don't have a heart."
"That's good you understand it," he answered and drew her closer for a kiss.
It needed only a few strokes to return a necessary condition to his member. Satisfied with the result, Shepard moved further and decided to pay attention to his testicles, playing with them carefully with her hand. The same moment she felt Leng's hand got under a fabric of her underwear. She knew she was too wet already. And when she felt as he grinned into a kiss, she felt herself awkward. But unpleasant emotion quickly passed. She doesn't give a damn of what Leng's thinking. She'll just take what she wants, for the sake of her own pleasure.
Leng demandingly pulled the last element of her clothes down her hip, and she got rid of her panties by one hand. Shepard decided to take the initiative and bestride him. His palms cupped her breasts and he began to play with the nipples, twisting them between his fingers. Shepard moaned and arched her back, feeling a pleasant hot feeling in her belly. She slightly raised her hips, took his cock with her fingers and began to stroke his tip along her wet, gentle flesh. Rubbing it by a clitoris, she returned a tip to her entrance and back again. A clunch of Leng's fingers on her nipples strengthened, and Shepard bit her lip, swallowing a groan. She continued her game with his cock, teasing his tip, sliding it in herself almost completely, and then again caressing it only with her lower lips.
At last, losing his patience, Leng exhaled deeply, seized an appropriate moment and grabing strong her waist entered her completely with one fast movement of his hips. Shepard gasped. She needed some time to get used to him, but Leng wasn't going to give it to her. Uprising, he started to penetrate into her, setting quite fast pace.
But Shepard collected herself quickly. She seized the man by his wrists, tore off his hands from her waist and drove them behind his head, leaning forward and holding them there.
"You're so impatient, Leng..." she said, rolling her hips smoothly and setting her own tempo.
"My!" he parried. " Just to shove a dick into you was enough for you to call me by my name, instead of one of those idiotic nicknames. Old man Freud would be proud of you, Shepard."
"You flatter yourself," she purred, moving her hips the way to get a deepest penetration. "Especially considering that your dick is not so special among the others so far."
"And you're not the one to make a big effort for," Leng didn't become puzzled.
Already familiar sparks flashed in her eyes and Shepard quickened her pace, moving now forward and mounting diligently on all his length. Soon enough she couldn't constrain the groans any more; she released Leng's wrists and straightened, throwing back her head and given to her feelings. Leng didn't stay idle and began to raise his hips towards her, holding her loins.
Shepard almost cried out, when her body was flooded by a wave of pleasure; she jerked convulsively a several times and then limpened, lowering her hands on Leng's thorax and panting. He still was inside her and needed his own discharge.
"So you prefer to be on top," Leng said. His breath almost didn't quickened, but a few sweat drops appeared on his forehead and temples.
"Yes... I like... to have everything under control..." Shepard answered out of breath.
"Probably, this is the only thing we are similar," he said, and one moment later she was already under him.
He went down with several kisses to her neck and slightly bit her gentle skin, pulling a weak moan out from Shepard, and entered her again. Perhaps she would resist his rush if she wanted to. But she felt herself so good now and decided just to drift and take pleasure.

His thrusts couldn't be foreseen. Sometimes he quickened as if preparing for a coming orgasm, sometimes he stilled for a few seconds, plunging into her as deep as possible, and when she started to get used to this feeling, he left her sharply. It was unusual, and after some time Shepard felt a dizziness. She barely controled herself and her groans, her hands wandered thoughtlessly along his strong back, squeezed his buttocks, embraced him with her hips, trying to pull him even closer, and her swelled lips answered on his kisses and caressed his skin with passion.
Shepard already lost a sense of time, muttering between her groans something which Leng heard as "more". At some moment he stopped and left her, overturning her compliant body on her stomach and raising her hips with a jerk to himself.
The new angle of intrusion gave the new feelings, and Shepard felt that her second climax is close. For all this time Leng didn't utter any groan, and this irritated her slightly. Usually she got used to receive some reaction from her partner and to know when he takes his pleasure too, but now it was almost impossible. So all that she could is to relax and assume that Leng liked what he did.

His hands seized her waist, and his thrusts were slowed down, but became sharper and deeper. Each of them forced Shepard to moan and to crumple the sheets with her hands.
"I...will remember forever this moment...Shepard..." his tense voice sounded suddenly.
"Fuck you..." she groaned.
He just laughed softly, but it was muffled by sounds of violent contacts of their hips.
"I said... fuck you, Leng!" she cried out, feeling an approach af her climax.
The loud, painful slap hit her ass, forsing Shepard to gasp in surprise. Her inner muscles shrinked from unexpected painful feeling, and her consciousness faded for some instants, spilling though her body the hot and cold streams of pleasure. At last, she recovered her sense and felt as Leng made some last chaotic thrusts, uttering a sound similar to a low groan.
Feeling herself absolutely weak, Shepard turned over with effort on her back and closed her eyes.

"So what? No tricks, no cunnings? Really? You just leave? Or will return at night to cut off my throat while I'm asleep?"
"Not today," he said, fitting his armor chest plate. "Your death can't help me anymore to perform my mission on the Citadel as it should be."
Shepard chuckled.
"Besides," he continued, limbering up his shoulders, "I'd like you to live for some time with a thought that you willingly fucked with one of the most entrusted "Cerberus" agents, and it's after you learned that he killed your lover with his own hands."
The smile disappeared from Shepard's face , and she frowned, giving the operative a gimlet gaze. Put on a vizor, he turned to her.
"Next time when you will interfere my plans or "Cerberus' ", I'll kill you. And believe me, Shepard, my hand won't falter."
"As mine," she answered gloomy.
"Ah yes..." he stopped in the doorway, remembered something. "Send my regards to Anderson. Tell him not to worry about my legs. They are better than ever."
When the door was closed behind him, an oppressive silence fell over Shepard.

And they lived happily ever after... Oh, wait... it was another story :))

Thanks for reading, guys. Hope you enjoyed it. And don't hate Kai Leng. He was just a little boy once who needed some care and kindness :) It's a pity that the Illusive Man was the only one who gave him that.