Simulation
by MicaMeesha
Copyright© 2026 by MicaMeesha
Science Fiction Sex Story: A male and female cosmonaut launch from Earth on a secret mission to Mars. The journey will be long and there are only 2 of them in very close living quarters
Caution: This Science Fiction Sex Story contains strong sexual content, including Ma/Fa Consensual Fiction Science Fiction Space .
I had my spacesuit on; I was just awaiting the helmet, which was being held by a technician. The night was still with us; we would be launching from Baikonur Cosmodrome in Kazakhstan just after dawn. I had slept poorly and was half awake when they came to get me at 0300. I always sleep poorly before a flight, and the fact that this one was to go to Mars didn’t make my fretting any easier.
The Americans didn’t know what we planned. They had been talking about going to Mars for years, their billionaires were spending billions of roubles testing spacecraft to take them there, and they still hadn’t even managed to get to the moon for over fifty years. We were just quietly getting on with it; we would be first.
The plan was simple. We would launch into a transpolar orbit, and then, just when the world expected us to de-orbit and come back to Earth, we would initiate the nuclear drive and head to Mars. The world would gasp. Every day over the next two weeks more ships would launch, all expected to arrive and land in the same area of Mars, each ship carrying supplies that we would need.
The other ships would actually overtake us; they could accelerate and, crucially, decelerate at a rate faster than we humans could tolerate. When we land on Mars, there will be a small amount of fuel left in our ship. That would be used for landing burns on our return to Earth. We would use the nuclear propulsion motors to take off from Mars; we didn’t have to worry about radiation because the planet was basically dead.
“Mica”, the technician said, “your helmet.”
I turned to face him, and he placed the helmet over my head, twisting it and then securing it in place.
“Comms check, Mica,” said a voice from mission control in my helmet.
“Receiving ten by ten,” I replied.
“Affirmative,” came the voice back. I flipped open my visor and was back in the room, so to speak. I guess civilians don’t appreciate how claustrophobic a space suit is. You do lose a lot of peripheral vision, and you also lose all the peripheral sounds. In the spacesuit all you hear is your breathing and whatever comes over the radio.
I turned and faced Dimitri Andropov; he was to be my co-pilot on this mission. He had just completed his helmet check, and all we had to do now was await the shuttle to the Gagarin launch complex.
“Potoropis’, prishlo Vremya,” the voice came over the comms, telling us to hurry. The technician pointed to the door; the shuttle was waiting. The journey to the launch complex was surprisingly bumpy, but then funds were low, and none were wasted on infrastructure maintenance, at least not infrastructure that was not directly involved in the launch.
We got in the small lift that took us up the launch tower, and then we walked across the crew access arm to the open hatch. Dimitri went in first; as the co-pilot, he sat on the far side of the capsule. I went in next, and once secured in my seat, a technician tapped my helmet, and “khoroshaya skorost” came over the helmet, wishing us good speed.
There were a lot of checks to do before launch; most of Dimitri’s checks were a cross-check of mine, but he had some of his own. Not many, but some, and I did not have to cross-check his. Time passed, almost without noticing, and then it was time. The launch was always tense. Would we die, unknowingly, in a huge explosion? Would we be launched to relative safety by the capsule eject, only to land in what was deemed to be a safe zone, although somewhat painfully, or would all go well and we would launch?
There was a shudder, a loud noise, a lurch, and an even louder noise, and then someone seemed to punch me in my chest, and I was thrust hard back onto the seat. A lot of vibration, and a huge weight on my chest. We had launched; no explosion, no escape capsule, we had launched. A wave of relief passed through me, and I guessed Dimitri too.
The noise stopped, and I guessed we had gone supersonic, but the vibrations and the pressures remained. Eventually there was a lurch, and the pressure stopped pushing. The first stage separated, and then after a moment the pressure on our back returned; the engines on the second stage had ignited. That was the last potential disaster point on the mission to orbit.
A few nudges from thrusters, and we were in transpolar orbit. I opened my visor and breathed in the cabin air. It tasted less chemical than the suit air, and out of the corner of my eye I saw Dimitri open his visor and heard him sniff and then sigh.
“Smells better,” he said. “In fact, I think I can smell you; yup, definitely.”
Well, I didn’t know what to make of that. Did I smell?
“I had never noticed before,” he said, “you do have a good smell.”
Crumbs, well, I didn’t know how to respond to that.
“We have two days in this transpolar orbit and then...” I changed the subject; Dimitri had put ideas into my head that absolutely should not be there.
“Yes, Mica, and then we are off to Mars.”
After about twenty hours, I had a chat with Dimitri about life in the capsule. We had stayed in the launch capsule for the first few transpolar orbits, and then we had gone down to the living module. This was much bigger; we had room to move around, and there were plenty of handholds to get around, useful in zero gravity.
“I am finding the spacesuit a pain,” I said to Dimitri.
“In what way Mica,” he asked.
“Oh, it just restricts movement; I am feeling stiff in my joints. We are in the living area; why don’t we take off these suits and just, well, move a bit?”
“Well, we could, but we don’t really have much choice in the way of clothing, not until we land and the supply ship can give us our Mars wardrobe.”
And he was right; it had been pretty much assumed that we would live in our spacesuits, and that was proving increasingly uncomfortable. Definitely feedback we needed to send to mission control. All we had available here in the living module were a few T-shirts and basic underwear.
“I can live with that, Dimitri; I would rather live in knickers than this bloody spacesuit. We will need the suit for when we land; I don’t think that we need them before.”
“Da, da, khorosho,” he said, agreeing with me.
It took quite a while to get our suits off. I know that it crossed my mind that I could probably get it back in far quicker if we had an emergency, but eventually we were both just wearing a T-shirt and knickers.
I did some callisthenics, stretching my muscles, bending over and backwards, and reaching my arms out. Dimitri was doing something similar, but I didn’t watch him; I was simply enjoying the freedom of movement.
In the living module there was a proper space toilet, and that meant that we were able to remove the catheters. Oh, that was a relief. I am sure it must have been for Dimitri too; although we didn’t watch each other do the removing, it did cross my mind that it would be interesting to watch him. The used catheters were stored in a dedicated medical waste box and stowed in the storage area.
We spent a few hours just luxuriating in the freedom of movement. Eventually it became time to de-orbit and fly to Mars. We made our way up to the command module and started the preparations. Mission control had already sent the various coordinates and programme adjustments to our flight computer; all we had to do was monitor and make sure nothing went wrong.
As before, Dimitri climbed into his seat first, and then I followed, having to bend over, my bum facing him, and then I was finally able to sit. We put our headsets on, which allowed us to communicate with each other and mission control. As I was putting mine on, I happened to look across at Dimitri. I don’t know why I did, but I found myself staring at a rather large bulge.
“Bozhe moy, Dimiri, tvoy chlen,” I exclaimed and pointed at his lap.
“Well, if you will wave your fanny in my face, what do you expect? He said and laughed.
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