Test Subject

More of the phallus pierced in and she screamed again. This was definitely the biggest cock she had fucked in her entire life. When it was half way in, the creature pulled back, and then in again, a couple of centimeters deeper. He did this a few times until the tip was banging against her uterus.

He is so freaking big!

The yautja was trying with all his might to fight against the controlling device on his back. He was angry and frustrated. He could see that the intruder had a similar contraption on her back, which meant that she was here against her will.

But then he realized something else. The human's pussy was clenching his cock in the most pleasant way. He had only mated with females of his own species and this experience was new to him. This female was warmer and softer.

After a moment, the odd couple was getting a rhythm. They fucked with stiff, perfect motions that made them look like machines. Aylin was almost standing, with her knees and torso slightly bent forward. She moved her hips backward in perfect synchrony with the cock that moved in the opposite direction.

The yautja had his feet steady on the ground while he swayed his hips back and forth, penetrating the tight pussy in front of him all the way to the bottom. He wasn't so angry anymore. If he wasn't under control of the device, this female would be dead right now and he wouldn't be enjoying the strange mating session.

Every time his cock reached the bottom of the Aylin's pussy, the yautja groaned with pleasure.

He had been so stupid for letting himself get captured, but at least something good was coming out of this nightmare. He had learned that human females were great for fucking.

Both Aylin and the yautja felt their excitement rising to a boiling point. As he got randier, he wanted to fuck her faster and deeper, but the device wouldn't allow it. He kept moving with the same pace. Only his grunts got louder.

If we keep this up for a little longer, I am going to cum again! Aylin thought.

Aylin was on the verge of climax and she wanted that cock to pump her as fast as possible. The same way it happened with the ovipositors, she didn't care anymore that it was an alien cock lodged in her pussy. All she wanted was release...

The both reached climax at the same time. Aylin felt the first gush of hot sperm ejaculating within her loins and she exploded in mind-blowing bliss. Apparently, the device controlling the yautja had the same flaw, because she felt his hands grabbing her waist, pulling her closer to his body and lifting her off the ground.

Aylin didn't think it was possible, but when he pulled her back, his cock went even deeper. Her eyes rolled until they were mostly white, her legs shivered violently and her pussy twitched over and over, milking the creature's balls to the last drop.

This orgasm was stronger than any of the ones she enjoyed in the other chamber. Aylin could feel the device losing control of her body for longer periods of time, but all she could do was shiver in utter pleasure.

It was obvious that the yautja was experiencing the same thing, because he kept his tight grip around her waist. The device wasn't controlling him at this moment. But it didn't seem to matter. The creature was acting by instinct and his only desire was to push his cock as deep as possible into Aylin's body and ejaculate inside of her.

Aylin could imagine the multiple eggs in her womb getting bathed with sperm, being fertilize one by one. Her orgasm was fading away but she could feel her partner's cock still pulsating, spewing cum within her body. It felt so good. No human male could ejaculate this much.

When his orgasm was over, the yautja let go of Aylin and she fell to ground. The device took over again.

Aylin thought about the experiment in which she was an unwilling participant. Now some of the eggs in her body were inundated with cum, but evidently these eggs came from a different species than the yautja's. It was unlikely that the his sperm would be able to fertilize them. Maybe the stupid robot had it wrong and nothing was going to happen after all.

I hope these eggs die inside of me and then I'll just push them out.

In any case, she could feel her body moving on its own again and she knew that the ordeal was not over. The robot made her lay on her stomach and she saw the creature looming on top of her. After a few seconds, his cock was poking at her anal entrance. Aylin didn't know how to feel about this.

He is going to fuck my ass!! I wonder if this will make me cum too.

The aroused woman felt the fat cock penetrating her ass and moaned loudly. The previous sex session had felt so good. There was no reason to believe that this would be different.

After a moment, they got into rhythm. Mechanical movements with perfect synchronization. Now Aylin was certain that she was going to climax again soon enough and she couldn't wait for it.

For the gods! This feels awesome! I wonder why I had never tried it before.

This session lasted longer, but the end result was the same. Both Aylin and the yautja exploded in orgasm simultaneously. The eggs lodged in Aylin's ass were flooded with sperm too, but the woman wasn't worried anymore. She didn't know for sure that her incompatibility theory was accurate, however, the pleasure she felt at this moment was too great to care about little details.

One thing Aylin couldn't understand was how the yautja could store so much sperm in his balls. She could feel his phallus pulsating over and over, ejaculating buckets of cum into her loins. This sensation pushed her orgasm beyond the limits of comprehension. Aylin thought she was going insane.

The robot knew that he only had control of Aylin from the neck down, so he needed to figure out a way to make her suck the male's phallus and swallow his cum, in order to fertilize the eggs in her belly. He had an idea to accomplish this.

He made the couple fuck again. The yautja was kneeling with his torso tilted backwards and Aylin was sitting on his lap, with his cock buried deeply in her pussy. He moved his crotch forward and backward while she waved her hips the same way. The sensation was delightful for both of them.

The odd couple was now fucking while facing each other. Aylin still thought that he was ugly as hell, but his cock was a gift from heaven. She swayed her hips sensually while looking at his yellowish eyes. It was so pleasurable that, maybe if she wasn't under the control of the device, she would be doing the same thing by her own accord.

The yautja stared at the woman's face with curiosity. She looked back at him, but from time to time, her eyes rolled up her head. He suspected that this was a primal reaction to the sensations of the mating session. She was enjoying this as much as he was.

While she looked at his monstrous face, Aylin realized that there wasn't hate in his eyes anymore. He despised being controlled by the robot the same way she did, but he didn't hate her. They both were part of this experiment against their will, and despite the circumstances, their sexual compatibility was more than evident.

Aylin kept looking at his eyes, avoiding the rest of his face, getting some comfort in the knowledge that she was not alone in this odyssey.

The couple went through the motions for a while until they climaxed yet again. Aylin threw her head back and screamed in bliss while he squirted his cum inside of her pussy. She couldn't understand why the robot was flooding the eggs in her womb one more time, but she didn't care.

Despite her orgasm, the controlling contraption kept her moving her hips as fast as possible, only interrupted for brief moments. The yautja kept swaying his crotch as well, stabbing her pussy while filling it with sperm.

This quickly became Aylin's strongest orgasm so far. The stimulation was so overwhelming that she started to lose consciousness. Aylin tried very hard to enjoy this bliss for as long as possible, but at the end, she lost the battle. When the orgasm was over, Aylin was unconscious. She had her back resting on the floor and her hips on her partner's thighs. Her eyes were partially open, showing only white.

The yautja's phallus slipped out of her pussy and amazingly it was still erect. He looked down at the female, wondering if she was dead. He noticed that she was breathing and he felt some kind of relief. He was hoping that he could fuck her again later on.

The yautja soon found himself moving, following the robot's commands. He lifted Aylin's unconscious body and placed her on top of a crate. Her legs hung from one end and her head and arms from the other. Then the yautja pressed his erect cock against the woman's lips and this brought her back to consciousness. Aylin was confused. She could see the creature's long phallus upside down, right in front of her face.

"What... is going on?" She asked groggily, but quickly understood what was happening. Her partner wanted a blowjob.

Aylin willingly opened her mouth and let him in. The phallus immediately reached the back of her throat and penetrated further down her esophagus. The woman's pussy twitched hard as she felt the thick cock stretching her lips, then her neck. She was staring at her partner's balls, hanging a few centimeters from her face and getting closer. This meant that most of his phallus was already buried down her throat and more was coming! Aylin's pussy twitched again.

The yautja was amazed that he could fuck this woman's face so deeply. He could never do that with a female of his own species since their mouths were not able to stretch that much. This slim human was full of pleasant surprises.

He started fucking the woman's throat with a rhythmic pattern, moving his crotch back and forth, allowing her to breathe a couple of times every minute. Aylin was so aroused, that a small puddle of her own lubricating fluids was growing between her thighs.

Squelching sounds bounced against the glass walls of the chamber and made the whole ambiance even more erotic. The yautja wanted to fuck Aylin's mouth faster, but the robot didn't know or cared about what he wanted. They maintained a steady rhythm, getting slowly but certainly closer to orgasm.

Aylin couldn't believe it was possible to reach climax just by having a big cock in her mouth, but her pussy was burning with excitement and it twitched in synchrony with her partner's motions. Her muffled moans and his groans got louder. They were going to cum again very soon...

He shoved his cock one last time and then he discharged a huge load of sperm directly into her belly!

Aylin felt his phallus throbbing between her lips, then she felt the warmth of his sperm flowing within her loins. She exploded in climax too. The first few seconds of orgasmic turmoil only happened in Aylin's mind, preventing her to think about anything but utter bliss while the rest of her body remained motionless.

Then the device lost control of Aylin's neuronal signals and she responded accordingly to the waves of mind-blowing pleasure that radiated from her core. The woman's left leg stretched out and trembled rapidly while her pussy jolted so hard, that a stream of her lubrication fluid gushed forcefully across the air.

When the yautja was done ejaculating, he stepped back, removing his phallus from the woman's oral cavity. The creature would have preferred to remain a little longer with his cock between her lips, enjoying her tightness and her warmth, but he was not the one in control.

Aylin was still climaxing while he pulled away and the powerful orgasmic contractions forced some of the accumulated sperm to erupt from her mouth like a fountain.

She still couldn't believe that it was possible to cum this hard just by giving a blowjob and without touching her body, but here she was, shuddering in bliss and relishing every second of it. At least, the weird experience was showing her something new about herself.

A moment later, all was quiet again. Aylin was catching her breath with remnants of cum gliding down her face, staring into nothing with half opened eyes. She was thinking about the huge amount of sperm churning in her belly at this moment. The eggs that she swallowed earlier should be swimming in it. She better be right about the incompatibility of these two species.

I hope I am right about the eggs... I am stuffed with cum.

As her orgasmic brainwaves faded away, the contraption took over. The robot made Aylin stand up and guided her towards the door. The experiment in this chamber had been completed.

The yautja watched her go with a hint of sadness. He had been in this cell for a long time and he didn't know how much longer he will remain trapped in this place. This human female could help him pass the time while he think on a way to escape.

Aylin turned her head as she walked, looking back at the ugly humanoid. She knew that he was in the exact same situation as hers, and this made her feel less alone in this ordeal. She felt sorry that the robot was taking her away from him.

"I wish I could stay here," she said, not certain that he could understand her.

In the back of her mind, Aylin also felt sorry to leave behind his gorgeous cock, but she pretended she didn't care about it.

****

There was another adjacent room with another chamber inside. Aylin was more curious than scared about what was waiting for her this time, but than changed the instant she passed through the door...

There was a xenomorph inside! These were savage monsters with the single purpose of killing whatever crossed their path to feed their queen. Aylin tried with all her might to run out of there but her body didn't respond and the robot made her walk straight to the creature.

"Gods! Take me out of here!!"

The xenomorph had been curled up in a corner of the chamber. The moment Aylin entered, it started moving and showing its teeth.

When Aylin reached the center of the room, the xenomorph jumped with amazing speed and tackled her to the ground. His face, filled with sharp teeth, was a few centimeters from hers and the terrified woman believed she was going to die for sure. She had never been more scared in her entire life.

But then she noticed some hesitation from the creature. She couldn't see any device attached to his back but maybe the robot was also controlling him somehow. Aylin considered the possibility that she might survive this too, the same way she did with the yautja.

Trembling with fear, she saw the monster's head moving down her body. He stopped a second at her breasts, smelling them, then moved further down, stopping again at her belly. He placed his eyeless face right above her abdomen and examined her carefully.

The eggs!!! It is smelling eggs!

It was then when Aylin remembered that her body was stuffed with alien eggs. The xenomorph had detected them and this was the only reason why she wasn't dead yet. She was carrying his queen's offspring.

The creature moved back and stood on two legs. The robot made Aylin sat up and the woman's eyes were immediately drawn towards his crotch. A large, shinny cock had emerged from his body and now was dangling between his legs, getting even bigger.

"His cock is out!" Aylin said, realizing what was going to happen next. This monster was going to fuck her!

After all that had happened to her so far, she wasn't sure if this was a bad thing. Getting ravaged meant staying alive. A moment later, Aylin was standing and bending over, offering her ass to the xenomorph.

Oddly enough, the creature knew exactly what to do, as if he had done this before. He grabbed Aylin's hips and aimed his phallus at the woman's vaginal entrance.

I can't believe a xenomorph is going to fuck me. Not in a million years I thought this could ever happen.

Aylin felt his cock touching her pussy lips and gasped. She looked back noticing that his phallus was thicker and longer than the yautja's. She wondered if it was going to hurt this time, but she doubted it.

The astounded woman screamed when she felt the enormous phallus penetrating her as deep as humanly possible. The xenomorph's motions were not slow and robotic like the yautja's. This monster was brutal and started fucking her in a frenetic way. Aylin could feel the malleable eggs within her womb being pushed apart to make room for the large cock that relentlessly invaded her body.

While taking in such a huge appendage, Aylin felt a brief moment of discomfort and then a burst of incredible pleasure. Now she wondered if she was going insane. How could she enjoy so much this brutal ravaging from different ugly monsters?

She had never felt any attraction towards alien's in the past. Nor she had any sexual experience with one. But now she was beginning to understand why there were groups of women that didn't bother to have sex with human males any more. She didn't know if she would be able to have normal sex after this.

The xenomorph had smelled a large amount of eggs inside this warm host and he was desperate to fertilize all of them. It would be a huge triumph to be the father of the queen's offspring. He had been taken away from his queen and kept in this closed space for too long. This compensated all of it.

Despite the fast pace of his motions, the xenomorph took several minutes to reach his peak. During this time, Aylin climaxed two times and she was in the midst of her third orgasm. The sheer size of the monster's cock was enough to send her over the edge with ease, but adding the frantic speed of his thrusts was more than she could take.

This monster was not only a ruthless killer; he was also a sex machine. His objective was clear and he wanted to complete it as quickly as possible to avoid possible interruptions. The creature couldn't know that the robot was making sure if having no interference with the fertilization process. He was allowed to fuck Aylin for as long as he wanted.

Then, after twenty minutes of brutal hammering, the xenomorph ejaculated inside Aylin's womb. As expected, the sensation of warm sperm filling her loins reignited Aylin's climax, transporting her to new heights of pleasure.

****

Aylin's head was spinning. She was lying limply on the floor, her eyes still rolled back into her skull, and shuddering sporadically from her receding orgasm. At this moment, within the haziness of utter bliss, she was in full control of her body but was too overwhelmed to the anything.

Meanwhile, the xenomorph was kneeling beside her with his head very close to her buttocks. He was smelling the eggs inside of her body and realized that not all of them had been bathed with his sperm. Some of the eggs were kept in different cavities. This host was more complex than he thought.

Analyzing her body more closely, the monster discovered that there was another opening on the woman's lower section.

Before the creature figured out what to do, Aylin slowly stood up, walked over to a nearby crate and laid on top, facing upwards. Then she pulled her legs up to her chest, offering a full view of her anus to the watching monster.

The xenomorph couldn't understand why this female was cooperating but the didn't care. He wasn't wasting this opportunity to fuck her in the ass, and consequently, fertilizing the rest of the eggs.

At this moment, Aylin had a frightening thought. She considered the possibility that, unlike the yautja's, this creature's semen would be compatible with the eggs churning in her body.

If this monster's sperm is compatible with the eggs, I am screwed!

It was a dreadful idea, but despite it all, Aylin wanted that cock inside of her again. And her wish was coming true soon enough. The xenomorph moved forward and aimed his cock at the woman's hole. The opening seemed too small compared to the one he just fucked, but there were unfertilized eggs inside of the host and he had to get it in, one way or the other. Aylin was holding her breath; she was ready.