Editor's note: this work contains scenes of fictional incest or incest content.
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Staryear 2267: Major and Maria Mars had just left the planet Octoforomina in their ship, the Bajingo, a starship that looked suspiciously like a vagina. An alert on the Bajingo sounded, alerting the crew of two that there was an intruder aboard. Major Mars' captain and step-mother, Maria was in her quarters. Major told his step-mom over the comm-link that he was going to check it out.
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Maria Mars ran her soapy hands over her enormous breasts as she showered when she heard the ship's intruder alert blare. With the alarm sounding and no further communication from her step-son, Major, she began to worry.
Maria pressed the comm-link in her shower and spoke, "Major, this is mom. Have you located the intruder. Come in."
The 18-year-old space explorer who was trying to maintain a position of stealth as he searched the ship with his phaser out gritted his teeth as Maria's voice sounded off. Major's father had married Maria when Major was barely learning to walk. Then when his father went missing, Maria raised him all in her own. She was the only mother Major had ever known.
"Nothing yet, mom. You don't need to worry, I can handle it." Major said.
"I know, honey, but--"
"Mom! You trained me yourself. How many hours in the simulator have we logged practicing for this very scenario. I got this."
Maria relaxed and took a breath. He was right. She had confidence that Major would be able to take care of anything--if there was anything--stowing away on the ship.
"Ok, honey. You're right. I will just finish up my shower. But if anything happens, comm me at the first sign of trouble." Maria said before releasing the comm-link button, and beginning to lather the soap once more into her giant cleavage.
As soon as his step-mother mentioned the shower, Major's filthy mind immediately began to fantasize about Maria naked, with the water cascading down her curves.
"O-oh you're in the shower?" He asked, feeling his body begin to respond in arousal.
Maria was now scrubbing between her big ass cheeks. Her tits were the first thing Major's father noticed about her, but Maria's ass was what caused him to marry her.
Maria pressed her comms-link once more. "Yes, silly, but I'll be out soon, don't worry."
Major couldn't help himself, his dick was straining uncomfortably against his pants. His step-mother's body had been an object of his lust for some time now. Countless nights were spent wanking to the image he had created of his naked step-mom doing some of the most depraved things to him.
Major's hand his pants and he wrapped his hand around his swollen member. "S-so does that mean you are n-naked?"
"You kind of need to be naked too take a shower, Major Mars. You sound strange. Is everything ok?"
"R-right. Right. Yeah, I'm fine, mom." Major confirmed, his pants now pooled on the floor with his engorged cock in his hand, stroking it. "H-how much of yourself have you already--unh--cleaned."
Maria's hands were still between the valley of her ass, soaping and cleaning her rosebud. It felt good, and she could rarely help slipping a bit of her finger inside her tight asshole, so she didn't.
"Ungh--I mean you don't really need to know that, do you, honey?"
Major spit on his cock, adding some natural lubricant to aid his fervent stroking. He kicked off his pants and sank to the floor pumping his dick to the image of Maria's nude body glistening in soapy water, his phaser resting on the floor next to him.
"Mmm. No, of course n-not. Enjoy your--fuuuh--s-shower." He managed.
"Uh, Major?"
"Y-yeah?"
"You sure you're ok? You are sounding even stranger than before. Like you're out of breath." Maria questioned.
"Probably just something weird on our comms. The intruder alert is portably a false--unh--alarm too." Major replied, his eyes squeezed shut, imagining the woman on the other end taking his cock into her mouth. He was close now. He was too sidetracked to even notice the creature that had silently approached him. Until he opened his eyes anyway.
"Ohhh, FUCK!" He yelled when the blue humanoid creature came into his sight line, while Major was still pantsless with a throbbing hard-on in his hand.
"Major! Major? What is it?" Maria cried over the comms-link. But her step-son didn't respond. Maria shut the shower off and took off to find out what happened.
The creature was a female foramine, the native humanoid species on the planet they had just left. It was a primitive species, who had yet to achieve space travel. They wore no clothing and their females had eight orifices not including their mouths--4 for reproduction, and 4 for waste. Given the primitive-ness of the population, the Mars duo collected the artifacts they were searching for hightailed it off of Octoforomina as quickly as they had arrived.
The creature snarled and swiped at Major, but he dodged and rolled them pointed his phaser at the creature. Only there was no phaser. He wasn't holding anything. His trigger finger clicked the open air as he glanced at the phaser he had left behind across the room.
"Oh shit!!" Major cursed.
He dodged another swipe from the Foramine.
"Fuck! I can't get to my gun." He thought out loud. Then out of his peripheral the alien's other arm had swung and struck Major clean in the jaw.
He glanced down as blood from his mouth fell to the ground.
"You bitch!" Major swore, striking the creature back in the head, and then kicking her in the face.
"Think, you bastard." Thought Major. "How do you defeat a Foramine without a gun."
Major Mars thought back to the lessons on alien combat taught to him by his step-mother. "Goddammit!" He swore "I should have paid better attention." It's true. Half the time that Maria Mars was trying to teach her step-son something important, he was fantasizing about her tits, her ass, her pussy--.
"Wait! That's it! The Foramines were practically created for sex. I have to satiate the beast!"
The Foramine had recovered from his earlier round-house, and was slowly backing Major into a corner. Only, it wasn't staring at Major so much, but rather Major's manmeat. Thinking about Maria's body had made him hard once again, and his raging rocket ship was leaking pre-cum and pointed directly into the space above.
The alien stopped in her tracks, appreciating the human's dick, though potentially curious as to why there was only one of them. The males of her species were all equipped with four dicks.
"Well, this is not how I saw my day going," Major muttered to himself. He had just enough time to grab the creature in his arms, and slam her to the ground.