Author's Note: Finally, this Fanfic earns its M rating. Yeah, there is sex in it. If you do not enjoy it, please stop reading now.

Ok, Lesbian sex is hard. No pun intended. I am not quite sure of how it came out, but i do intend to improve.

Thanks for all the kind reviews!

And FanFicNewb, if any behavior of GLaDOS in this chapter reminds you of your dog, I would suggest that you seek professional help.


Chell woke up next morning back in her bedroom. Someone had carried her there. She remained in bed for a while. She didn't feel well, her body still was very weak. She tried to remember what had happened. They had found the birds, run away, then she had protected GLaDOS and then… She had kissed her.

Had she dreamt that part? That seemed surreal even for Aperture standards. The test subject sat on the bed and waited until the world stopped spinning. She got up and slowly made her way to GLaDOS room, which was occupying the chassis that day.

"Hi." She said, weakly.

The lights blinked.

"[Transference Complete]"

"Hey, are you all right?" Said the android, putting an arm around her, helping her walk.

"Better than yesterday, I guess. What happened by the way? The last thing I remember was me bleeding to death."

"You don't remember anything in between?"

"No."

"Good."

"What?"

"Nothing. Huh, after your stupid attempt to protect me, I carried you here, a mighty effort, since your weight almost destroyed my metal muscles, and closed you up."

"And that's it?"

"That's it."

Liar.

"Do we have anything to eat? I'm starving!"

"Sure" she said as she helped her test subject limp her way to the kitchen.

There was something weird about GLaDOS. Helping her? She had never been like that. Chell decided that she would have to check if the AI was lying or not.


What was the human trying to do?

Why was she trying to access the video feed? Did she remember what happened? She had said otherwise. Perhaps she was lying. Perhaps she thought it was just a dream. It didn't matter. She would never let her see it. GLaDOS quickly cut the piece of the video where THAT happened and saved it. She could watch it how many times she wanted and she wouldn't find a thing.

Why had she done that? Why had she kissed her? She didn't know. She couldn't know. She ran several scans searching for errors or viruses but she found nothing. What was happening to her?

She felt something that she had no idea of how to categorize. That had only happened in her beginnings, when she was just learning emotions. She had taken weeks to understand the concept of "sadness". Interestingly enough, the concept of "anger" she had understood immediately.

What was this new thing she was feeling?


A few days had passed since the incident and GLaDOS had made no mention to the kiss. Had it really happened? She had to know.

It was not easy to access the recordings from the cameras that watched the facility but she managed to do it and finally watched the moments where GLaDOS had cried and waited by her bedside. She saw herself waking up and the android hugging her. And then… the android left. No kiss. She just left.

Well damn.

She was almost closing the video when she noticed something. The time marked in the video. The android hugged her and suddenly the time skipped to ten seconds later. There was ten seconds of footage where anything could have happened. That sneaky bastard. Good for her that she remembered everything that happened during those seconds.


What should she do? Should she just go and kiss her? Seemed a good enough idea, even though she feared the robot's response. Screw it. Her back had been destroyed because of her, she deserved at least a kiss.

Chell strode out of her room and headed for GLaDOS room, who was in android form. She looked like she was admiring her other form. She caressed her chassis until she noticed the human at the door. She stopped what she was doing and pretended she was doing something else.

"How is your back?"

"Good. I almost feel no pain." She said as she approached her.

"Good. You should be fully functional in no time."

"GLaDOS, I have a confession to make."

"What is it?" The android looked at her seriously. What had she been hiding?

The human got closer. Uncomfortably, or perhaps extremely comfortably, close. A shadow of doubt crossed her mind. Could she really do it? What would it mean, having sex with a robot? What kind of twisted and sick person she would be if she humped a machine?

.

.

.

Ah screw it all. GLaDOS was a woman as far as she was concerned and while that might have been a problem back when everyone was alive… well, that "alive" thing had been taken care of. She knew she wanted it and she would do it no matter what.

"I lied." She said, approaching the AI's face. "I remember everything." She whispered.

"What do you me-" Her phase was cut short by the fact that a human mouth now blocked her robotic one. Chell kissed the robot and the robot… the robot kissed back.

Chell finally broke the kiss as she gasped for air. She met a stern look on GLaDOS face.

"What? Angry because I fooled you?" the human said, grinning.

"Yes, very." She said before kissing her again.

She felt the AI's hands run through her body, never stopping in a single place for too long. For the first time in her life, the AI did not know what to do. Where did she put her hands? What did she grab? What did she leave alone?

Chell, however, did not have such concerns, and her hands went straight for her partner's ass.

"What do you say, time for some testing?"

"It is always time for testing."


They reached the sleeping quarters leaving a trail of clothing behind. When she pushed GLADOS on her mattress, they were only covering their most interesting parts, a fact that Chell intended to change as soon as possible. She saw that the AI was shaking.

"No need to be scared." She said, getting on top of GLaDOS.

"I am not scared."

"Sure, I will pretend I believe that. So tell me, while you were building this body, where exactly did you place your Testing Euphoria Centers?"

"In order to maintain accuracy, I thought it was logical to place it with sensors in the several spots that corresponded to the erogenous areas in a human body," Chell had thought as much. "but why would you want to know th-" the android was interrupted by a jolt of pleasure that shook her body as the test subject slowly slid her hand in her black panties.

Accuracy indeed. How in the world did an android get wet? She wouldn't question it though. Surprises as these were always welcome.

"How are you- ah! - even doing that!? That is not how it is supposed to work!"

"Magic, now shut up and enjoy." She slowly caressed around GLaDOS' entry and clit. Why was a being that did not breathe panting?

Her finger slowly circling around her pussy. Slowly. Slower. Almost stopping.

"Chell… I have no idea of how this is even working, but I swear to god that if you don't stop teasing me right now, I will cause you pain in every possible way!"

The human approached the android's ear before whispering:

"I'd like to see you try." And she slid a finger in.

The AI gasped as a wave of pleasure passed through her. But Chell did not stop. She still had several areas that she did not yet explore. In one swift movement, she removed the other one's black bra. And she decided she had found her new favorite place in Aperture: right between GLaDOS breasts. With one hand and her mouth she worked on her nipples, whose existence amazed Chell in ways she did not expect, and with the other she worked on the lower areas.

She kissed the woman below her while she slid a second finger in and slowly started to move her hand, while the android thrusted herself against it, giving little cries of pleasure with each move. The couple began moving in an erratic rhythm faster and faster and faster until GLaDOS hugged her close and tight, clawing the recently recovered back of the test subject, and…

"Ahhhhh!"

It had just exploded inside her head. It was like the Euphoria but five times more potent. She had never felt something like that. She felt so light that she felt like she could just fly away. Nonsense, of course. Whatever remains of her that were on the human's hand were not nearly enough to make such drastic difference in her weight. But still…

After spending a few minutes with her eyes closed, just savoring the sensation she had just experimented, she looked down just to find the test subject dark eyes looking at her.

"So, how was it?"

"I have no idea of how the direct stimulation of any of my Euphoria Centers would cause such reaction, but…"

"But…"

A sly smile appeared on GLaDOS mouth.

"Why don't I show you?" She grabbed the girl by the shoulders and rolled until she was on top.

A dominant GLaDOS? That could not be good. Chell felt that she would be screwed, in both senses of the word.


She licked the human's body, despite every single system telling her that what both of them were doing was wrong. Her mechanical tongue traveled from Chell's belly to her nipples to her mouth. She loved the taste of the test subject. She then started repeating what the human had done to her, but improving in every step. She squirmed below her.

As her hand finally reached the test subject's panties, who were soaking wet, her curiousness took the best of her. There were very few things whose taste she did not know in Aperture. Soon there would be one less.

Chell did not expect seeing the seeing the robots placing her head between her legs. Not so soon, anyway. She felt her tongue enter her insides, causing her to twitch and squirm in the bed. GLaDOS, meanwhile, was cataloging every single reaction she would get from the subject to use in "future tests". And she had been right in her decision to taste the other one's pussy. It tasted delicious. She felt that the test subject was getting closer by the moment and when she was almost there…

She stopped. Chell looked at the evil smile that was looking her from below.

"Why did you stop? Keep going!"

She didn't really think GLaDOS would forget what she had done, right? How she had teased the AI that time, when she had entered the facility, so many weeks ago. She had a revenge to take and there was no better moment than this.

She approached the human's ear and whispered:

"Beg."

Son of a bitch. She should have guessed she would do something like that.

"P-please" she said, almost inaudibly.

"What was that? I didn't hear you." Her evil smile widened.

"Please!"

"Please what? Be specific!"

"Please fuck me you blasted machine!"

Good enough… for now.

Her fingers returned to return to take care of the unfinished business below while her mouth ventured again through the body, this time remaining on the breasts before her and not leaving. Her hands moved quickly and precisely, even though this was her first time. Her sensors worked quickly and she soon knew exactly what buttons to press to get the max out of the test subject.

It did not take long for the subject to orgasm, pleasure passing through her like waves, her nails digging in the synthetic skin. It took a few seconds until she managed to speak again.

"So, how was it?" GLaDOS said, imitating her.

"That was… amazing."

"I don't know why the surprise in your voice." She said, snuggling by her side.

"You know what?" she said, caressing one of the android's breasts.

"What?"

"I think I approve this kind of testing."