Prompt number 2! This is SFW. But still fun ;)

2) Who is always horny and will have sex at any time, at any place and at any time?

They were in the wards, looking through the market stalls at various homeworld trinkets and delicacies when it hit her. Bad.

Kaidan and Shepard had spent a day of shore leave wandering around the Citadel, hand in hand, like a normal couple. It had been a relief after the past few weeks of blood, sweat and tears trying to bring about a summit between all the species' leaders. Shepard had been about ready to bang their heads together by the time Kaidan dragged her off the ship for a well deserved rest and some distance from the war.

And now they were in the middle of a crowd, two of the most recognisable people on the Citadel and all she could think about was how she suddenly, desperately needed to jump his bones. A gaggle of Asari passed between them as she tried not to stare at his ass across the corridor where he stood looking at some new gauntlets that had caught his eye. Shepard bit her lip, hard.

It would take them the better part of forty minutes to get back to the apartment, and that was too damn long. Things were desperate, she was wound tighter than a Salarian at a Krogan convention. Think…think, think think…got it!

She ploughed through the Asari unheeding and seized Kaidan's arm, tugging him away from the stall and forcing him to quickly drop the gauntlets back on the table, much to the disgruntlement of the Asari owner.

"Shepard, what's the matter, what's going on?" His voice was tense but she simply ignored him and tugged him toward the skycar terminal nearby. She stabbed the call button and waited impatiently as a car hovered and drove over to land silently in front of them. Kaidan looked a little startled.

"Where are we—woah!" Shepard shoved him inside unceremoniously, grinning as he landed ungracefully in the backseat. She climbed in, slamming the door behind herself.

"Shepard, please, what's—" She silenced him with her 'I'm Commander-fucking-Shepard' glare, grabbed and handful of his sleeve and pulled him up into a sitting position. A moment later her knees were either side of his as she straddled him, letting out a sigh at the contact and pressing her lips firmly to his. He blinked in surprise, arms still by his sides as her hands began to move up his chest and further to rake through his hair. Kaidan managed to pull away from her for a moment, breathing heavily.

"Woah, Shepard, easy there—" Until his words were swallowed again by her kiss. He struggled to hold her off for another second.

"Shepard, shouldn't we wait until—" An annoyed sound issued from her throat until she once more bypassed his attempts to slow things down.

He remained motionless for another moment, stunned that Shepard was making a move in a public skycar of all places, until the shifted her hips against him and his mind went suddenly, completely blank.

"Please state your destination."

The skycar AI was attempting to take them to their destination.

"Anywhere." Shepard ground out, hardly moving her lips from Kaidan's.

"I do not recognise this destination. Please state your destination." Shepard swore under her breath, turning to shoot the computer a dirty look.

"Fine, whatever, Chagara district!" Kaidan's eyebrows rose.

"Shepard that's three arms over, it'll take an hour to get there!" She grinned wickedly, resting her palms against his chest once more.

"Precisely."

x-x-x

Kaidan did up the last of his shirt buttons as they pulled into the street before their apartment, and watched as Shepard calmly opened her omnitool to pay the now astronomical fare. She shrugged at his look, unrepentant.

"Worth it." He couldn't argue with that.

They exited the car and walked into the lift located near the lobby's entrance. Kaidan was still staring straight ahead. And really hoping he wasn't a little cross eyed. That had been… intense.

"So that was…"

"Yep." She flashed him a shadow of a dirty grin.

"And you just suddenly wanted…"

"Yep" It was a full on grin this time.

"Um. Ok. Well." He struggled to produce a coherent sentence. It seemed his blood flow was still directed to… appendages other than his cognitive centres. "Maybe you could, you know, tell me next time instead of kidnapping me?"

"What, you wanted me to conversationally tell you that we needed to do it urgently, in front of the very proper-looking Asari Matriarch who owned that armour shop?" He frowned.

"A codeword then?"

Her brow furrowed for a few beats as she thought, then cleared into a smile.

"Tacos."

"…Tacos?"

"Tacos."

"That's your codeword?"

"Yes."

"For 'I want to have sex'?"

"Yes."

"…Why?" Shepard smiled innocently, stepped forward and gave him a chaste kiss on the cheek.

"You were standing next to a taco stand."

Kaidan took a breath in to argue, held it, and then let it out in a huff. Nothing came to him.

"…Fine."

Shepard looked up from her seat on the floor next to the Hammerhead where she was repairing an electrical fault in an anterior environment sensor that had been playing up of late. Steve was standing behind her, the disassembled components of a motion actuator laid out on the workbench before him as he struggled to pinpoint the source of the movement issue.

Kaidan came down in the elevator, small towel around his neck and walked over to the workout area on the other side of the bay to them. Shepard looked up to notice him shuck his heavy BDU shirt to leave just his singlet and roll his shoulders to loosen them as he made for the punching bag in the corner.

He started out with push ups, sit ups and holds to warm up, and she found it was all she could do not to stare. Ten minutes into his bout with the punching bag, she could stand it no longer. Standing abruptly, she left her tools where they lay and approached him with a single-minded purpose. He'd just pulled back into his stance for a moment after a combination when her finger snagged a handful of his singlet and she summarily dragged him toward the elevator.

"Shepard, what—"

"Tacos." He looked at her incredulously for a moment, then a wolfish grin overtook his face.

"Couldn't resist, huh?"

She sent him a squinty-eyed look.

"Shut up."

Then pulled him onto the elevator, up to their cabin.

Shepard looked beautiful in a midnight blue dress that brushed her ankles and clung to her every curve such that Kaidan was having a hard time focusing on the party going on around him. Neither had really wanted to attend the fundraiser for the War effort but they both had their responsibilities. There comes a time when representing your race that what you do is to some degree no longer up to you. And you have to adapt, look beyond and move on.

Unfortunately for Kaidan, he was having difficulty with the 'looking beyond' part because Shepard looked incredible. She avoided formalwear like the plague, but he had to admit that when she needed to, Shepard could really bring it. Most of the evening they had spent separately in conversation with dignitaries and rich patrons to schmooze and encourage donations and Kaidan was getting antsy. He had to get some time alone with her, even just a moment.

Thankfully, a few minutes later, he saw her break away from the knot of politicians surrounding her a making for the bar. Kaidan quickly excused himself, he wasn't sure whether he'd done it politely as he had no recollection of what he said, and made a beeline for her.

His arm slid around her waist as she accepted the drink from the bartender, set it down on the bar and turned to give him a dazzling smile.

"Enjoying yourself?" Kaidan didn't quite manage to stifle the low growl in his throat.

She raised an eyebrow archly. His hand tightened on her side, insistent and needy.

"Tacos." He ground out.

"Kaidan, I don't think now's the ti—woah!" Kaidan pulled her sharply towards him, his hand finding her waist again to roll through the movement and bring her into a low dip. Her eyes widened at the intensity of his gaze, and the ghost of a smile on his lips.

"It's always the right time, remember?"