Kaylee and Mal showered together, pleased that their hard day had been successful and probably would make them a lot of money. (where are the kids?)

'I never saw those engines,' remarked Kaylee 'and now we're leaving and not coming back.

We could make a short trip over there, I you like darlin.'

'Is there air in the engine room, Malcolm?'

'I like where this is goin, Kaywinnet. 'Mal kissed his wet naked wife. 'We could just stay here. We're the last in the shower room.'

'I'd really like to see those LNG engines, captain. I'll make it worth your while. There's no gravity over there, is there?'

'Don't tease a horny man, Kaywinnet. Why don't we go check those out? We could make a quick trip over when the kids are sleeping. And you could inspect them on the spot,' her husband suggested.

' I don't tease… at least not for long. Let's do it.'

'Shuttle over, Malcolm, take a few capchures of what's there for customers?'

'That would be the plan, Kaywinnet.'

'Sure. Let's. '

Mal notified Zoe that he and Kaylee were going back over to the Ark.

' I can come along case you find something worth bringing back,' offered Jayne.

Kaylee glanced at the captain.

'No. This'll just be recon. No need for extra hands.'

After dinner, they took a pair of spacesuits up to the shuttle and lifted off, slipping over the bulk of the Ark, out of sight of Serenity.

Mal piloted the shuttle to the open cargo door that led to the village and then to the engine room. Without speaking, they stripped down to minimal undergarments, before suiting up.

They helped each other into their suits, Kaylee remarking on the stink of them after a full day.

'At least Jayne drained the bio units.'

'How come he's on honeywagon duty this week? What awful thing did I miss? '

Mal was busy caressing Kaylee's breasts as he fitted the suit. They had decided there was no point in getting dressed before going over.

'Not like we'll be meeting any strangers. '

He bent down to kiss her before fastening on her helmet and checking the seals. Her pink tongue traced the outline of his lips and she held his eyes before smiling and stepping back. His eyes asked a question and hers a promise.

"What we do for privacy, Kaywinnet.'

She laughed and returned his kiss with heat.

Kaylee was fascinated by the village, especially the freeze-dried park. This area was still cold, but the still running engines kept their destination warm, with some of the heat being pumped into the village.

Mal led the way to the engine room while Kayleee, who had stayed home while the crew found their cargo and explored the Ark, looked around in amazement.

'I've read about how we left Earth-That-Was and even seen some vids about it. A lotta my stories use the Leaving as a start. But I couldn't imagine…. This is a whole city inside a ship!"

'Not really a city. A town, mebbee only a village. Davy reckons there were five hundred crew awake at any time, tops. Probably less, most of the time. Only reason to have more was to make sure there was a next generation of crew, without people fuckin their sisters.'

'Geez you can be nasty sometimes, capt'n.'

'Lemme show you them engines you're so taken with an we'll see who can get nasty.'

They had removed their helmets once clear of the airlock, but still wore their suits. They had left all other clothing behind, knowing without discussion that an opportunity to be the only ones on a world would not easily come again.

As they left Serenity, River had chirped, "Have good sex!"

Sometimes it was very necessary to be alone. Even if there still was no privacy.

Engineering took up an area nearly 500 metres square and 20 metres high, and Kaylee lit up with glee. Engineering was both sealed and fully atmospheric. The engines needed oxygen to run and enough had leaked into the section that they were a little giddy with it.

Finding her suit slowed her down too much, she opened the seals and catches and stripped down. Mal watched with amusement and delight as his naked mechanic bounced around in zero gravity, cooing over engines and machines inexplicable to him, that she recognized at a glance. Her happy enthusiasm ignored his presence, as she stroked the humming machines and read labels and nameplates. It did not even seem to slow her down that most of the labels were in ancient lost Portugese.

He was entranced by his view of her rump, round and bouncy as she squeezed into a space behind some incomprehensible tank of something dangerous. He considered that she had one of the finest asses he had ever seen, which considering his experience included Zoe Alleyne Washburne and Inara Serra, definitely put her in the top three percent of buttocks. He reached out his big hand and stroked the smooth skin, cupping each warm globe in turn.

She swatted his hand away, 'Gimmee a minute, capt'n. I wanna check this gauge…' her words became indecipherable as she wriggled deeper into the machinery.

Her legs now. Slim but still curvy. Those curves were muscle, he knew. She could wrap herself around him and brace while he thrust up into her willing cunt. She could even from that position use those strong muscles to push herself along his hard cock.

She was sliding back now, and out with a triumphant wiggle. He stepped forward and embraced her, grasping her breasts and pushing his erection into the cleft of that rump.

'Rump.' he murmured.

'Whaah?' she replied, concentrating on the mechanism in her grasp. He moved one hand down her front and touched her clit. Just a flick, but she hissed with pleasure. He slipped a finger into her, already wet.

She always said engines made her hot.

Mal felt his cock rise in appreciation of that rump. He decided not to resist and cupping a buttock in each hand, he bent over and kissed them then gave into the temptation and bit the tender rounded flesh.

Kaylee yelled in surprise, jerking away and bumping her head on machinery. She pulled out of the space she had been investigating and glared like watching an offended kitten. Mal pulled her up and kissed the bump, pressing his erection into her soft belly.

She giggled. A bite or bump was just spice in the mix. Before Mal could kiss her she slid down his body and took his cock into her mouth.

He was a little too large for her to take fully, but her tongue had him gasping in seconds and when she sucked hard, he had to stop her if their private excursion were not to come to a sudden conclusion.

The floor was soft with some sort of smooth foam, easy to clean but comfortable underfoot. Mal lay her down and slipped his tongue into her cleft. Although his cock was near her face, she did not try to suck him again, but stroked him slowly, and as her orgasm approached, more than a little erratically.

With a cry, she collapsed boneless, Mal grinned in satisfaction, watching the flush rise and fall on her chest, her nipples hard and rigid, her breathless gasps. He turned and pushed into her cunt easily. Her walls were still spasming with the orgasm and it felt good. Very good. He settled into a steady tempo that kept her at orgasm at first gasping then moaning and finally as he came hot and hard, screaming at the intensity.

They lay wrapped around each other, holding tight, each trying to melt into the other.

'Nice show,' said a strange voice.