AN: Okay I warned you. This one is most defiantly M rated. Repeat the rating has gone up! If you are not a fan of car sex stop reading here. I will let you know when the fic gets more you-friendly.

He was getting annoyed, that was obvious enough. Normally Jim entered an almost meditative state when they were in the car but this meeting was important and the traffic jam was getting him worked up. Normally he'd rant on for a bit and then be fine, she could handle that but today was one of the rare occasions when he was carrying a gun. Moran wished she hadn't insisted upon it now because she would either get a full blown rant or the unsuspecting driver would get a bullet in the back of the head for a traffic jam that wasn't his fault. She really didn't want to argue with him nor did she want to clean this kid's brains off the windscreen of the car. Not that she'd be doing any actual cleaning but she didn't want the hassle of calling some of her boys to come and do it for her as well as waiting for one of the other cars to come and pick them up. She really hoped something caught Jim's attention soon; he was becoming insufferable these days.

Jim gave a dramatic sigh and started drumming his fingers on his armrest. Moran glanced out to the road ahead and the traffic did not look like it was going to let up soon. Oh how she hated London. An idea suddenly hit her of just how to keep her boss 'entertained'. It would probably earn her a few brownie points for the next time she was a little late or tired and snappy.

Moran unclipped her seatbelt and slid forward so she could shrug her jacket off more easily. As she bent down to slip her heels off she could see Jim out of the corner of her eye turn to watch her.

"What are you doing?"

Oh he sounded very tetchy, she smiled to herself as she slid over the cream leather seat to drop into the foot well on Jim's side of the car.

"You looked bored," she told him with a smile "I thought I'd entertain you."

She knelt up between his knees, stretching to kiss him before sliding a hand, slowly up the inside of his thigh. Jim stared back at her, looking slightly bemused. He raised an eyebrow as she undid his belt and took him into her mouth. She felt his whole body tense as she did so. He loved it when she did this, and if it kept him happy then she was happy to give him one of his favourite things.

For several agonising minutes she made long slow licks up the side of his cock as he started to groan with pleasure. Soon enough his hands found their way into her hair, holding her close as he pushed himself further into her mouth. It only took him a few desperate thrusts before he came in her mouth and he slumped back into the car seat gasping for breath. Moran watched him while she wiped him from her mouth; this was one of the few moments in which he seemed truly vulnerable. It was nice to know that she could make the mask slip, but it didn't last long.

Jim was quick to recover himself and he hated to owe anyone so he pulled his sniper I up from the floor of the car so that she was straddling his lap. He could taste himself on her lips as he kissed her, he loved kissing her after she'd sucked him off; the combination of their tastes was intoxicating. While he pushed one hand up under her shirt the other made its way up her skirt to hook a thumb inside her knickers and run gentle circles around her clit. She practically purred as he stroked her. He didn't need a white cat, he had his Sebbie. She rocked in his lap, trying to increase the friction between them; it was working. He felt himself go hard again beneath her and he decided that there was nothing else for it; he was going to have to fuck her, right here in the back of the car. If the driver dared to say anything about this, he'd regret ever being born.

There was some awkward fumbling as Moran slipped out of her underwear, but once Jim was inside her it didn't matter. For two frantic, mostly unpredictable, people their sex was slow, measured. It was almost like a kill for them; it had to be savoured because the good part was over in an instant. Moran rocked back and forth in her boss's lap leaning back against the back of the front passenger seat with her eyes closed, she liked to savour the sensation. Jim preferred to watch her; see all the little changes in her face, see what he could do to her while he just sat there with his hands on her hips, controlling her pace.

Moran started to speed up as she got closer and Jim grinned to himself as her panting grew quicker and turned into outright moans. She wanted to lean back further, to grip the headrest behind her but Jim pulled her in close, and the increased friction intensified everything, she wrapped her arms around his neck, running her fingers through his hair as she whispered his name in his ear and begged for more. Her breath hitched just before she came and Jim followed quickly after.

Her body relaxed into his and he began to stroke her hair and kiss her neck as she caught her breath. If he had been at her mercy before, now he was completely in control. If he felt like it he could snap her neck right here and she couldn't even fight him.

From the front the driver spoke up,

"Five minutes Mr Moriarty."

The boy deserved more credit than he'd first thought, not only was he pretending to be completely oblivious to the last twenty minutes of the journey but he was giving them time to tidy up. Annoyingly this warning did mean that Moran had to slide out of his lap.

Moriarty zipped himself back up and smoothed his hair back down. A quick glance in the rear view mirror told him there was a small lipstick stain on his jaw which came off easily. Moran had a harder time of it. Her skirt had shifted round; it was slightly funny to watch her wriggling in her seat to shift it back to where it should be. Her shirt was obviously stained so she stripped it off, perfectly happy to go out with the white tank top on under her jacket instead. As she lent down to retrieve her knickers from between Jim's feet he caught her wrist.

"Leave them off," he told her.

"Sir?"

"The traffic'll probably be worse on the way back."

Moran grinned at him,

"Oh I really hope so."