Selfish Symbiosis

Just a few days back...

Twilight is taking a shower, the hard work of making a fully functional experiment made her forget about things like the meet up she had with Sunset or to take care of her sweat, so now she's taking care of one of the things she had on a to-do list. She used the shower to pee a bit, and no one was going to say to her to not do that; it was refresing, but another thing was on Twilight's mind... Sunset, her and how the skirt she wears makes her thighs look big.

"S-sunset..." She moaned her name as she started to sub her pussy with her middle finger. "Why you have to look that hot?" Twilight's body were heating up imagining that was Sunset who was touching her pussy lips and clit, moaning a bit more and letting lust grow on her. Then her phone started to ring, snapping her out of her erotic fantasy. "Twilight Sparkle, you should stop fantasizing about these things in the shower" She though to herself before stepping out of the shower to answer the phone.

The next day, Twilight is walking on the streets going straight to her brother's house; it's been a few weeks since they last seen each other. On her way she spots Sunset, walking with stange clothing: a leather jakcet, a very short skirt and stockings... lace stockings? Twilight knew Sunset would never wear something like that; but she looked hot and for Twilight's eyes she would love to be dommed by her wearing that outfit. She sprinted a bit closer to Sunset. "Sunset!" Twilight yelled from Sunset's behind. "Good morning! How was your study session" Sunset stopped looking at her phone and looked at Twilight.

"It were great, but felt tired and went to sleep very soon. You know boring studying things" Sunset answered.

"Well, at least you have it under control" Twilight answered before checking Sunset up and down once again. "Wow, Sunset; i didn't knew you liked this kind of clothing. Isn't it a bit too... revealing" Twilight really didn't wanted to ask about Sunset's clothing, but it could be a chance to get her to do something with who she had a crush on.

Sunset cleared her throat. "Listen, Twilight; sometimes a woman just wants to show her true self and this is my way to show my own self to the world" Sunset answered with a convincing tone and a small wave of her hips. Twilight watched those hips wave distracting her for a brief moment, before her phone rang, to make her check who was calling her.

"Oh sorry, i have to go. I have to go see my brother and Cadance; see ya later" Twilight waved and run away answering to her phone. "Fuck, Sunset... you can't dress like that without wanting me to check you out; you sexy bitch just take me to your bed" She thought to herself while going on her way.

Later that night...

Papers flying, drawers being open and a lab full of desperation. "Oh no... Where is it?! I haven't tested it yet" She kept repeating to herself, thinking that saying that will help her to find it quicker. Then she looked to a window with the almost full moon in the sky. "If that is outside... then i'll better hurry and find it before it causes troubles. Dang it, next time i have to test more the stuff i make before losing them". She prepared everything for the research on the next day, there was no time to lose.

Twilight started looking for the experiment, but no clue where to find it; the streets, parks, nearby houses to Twilight's house but no... nowhere to find it. When walking close to Rainbow Dash's house, she heard something comming from inside, when she peeked from the window; she saw Rainbow Dash screaming of pleasure while being taken by... Sunset with a latex bodysuit? No, Twilight recognized the colours from that clothing... it was the experiment taking control over Sunset's body and despite how good and sexy she looked for Twilight's eyes with it on she couldn't let it do of more of that.

"I have to stop it... but it's been a day since i lost it" She though to herself. "If it's been a day, then the probability of it spreading to other individuals may be high... so i can't take care of one of them or it could sense it; i need all of them in one place; but how?" She knew that because of earlier attempts that despite failing she got some notes.

Close to the night, Twilight is still thinking about how she can solve this huge problem; doesn't know how big it could spread if given the chance. Then she got a text from Pinkie Pie, she said that everyone was there and was insisted on not contacting her; but she did as soon as had a moment alone in the bathroom; that's it, that's the right moment to act and to stop it from doing more damage to her friends or worse.

Twilight's car stops outside of Sunset's house, and Twilight brings a big backbag and her most serious face ever. She closed the car and standed in front of the house before taking a deep breath. "Ok, show me what you got... you slimy failed experiment" Twilight walked closer and placed a hand on the door and opened it slowly; this has to end... inside, almost silence; just the sound of moans filling the whole house, Twilight walked cautiously to not call the attention and all the ay up to Sunset's bedroom... as soon as she got vision of the room, she got shocked by the image.

All of her friends were covered by the slimy thing, lust were all over their minds fucking each other like nothing else matters. Sunset was at top of all of them masturbating the fake cock and in some ocassions peeing all over the girls. It spotted Twilight observing the scene completely blushed. "Oh!? It looks like we have an unexpected visitor" It said walking closer to Twilight undoing the cock just to show pussy lips as she would be naked. "Like what you see on us?"

"You took control over my friends, i should have never created you" Twilight confroted it, still her face was bright red as she couldn't take away her eyes from Sunset's pussy lips and breasts. "I'm going to end this"

"Oh really? How do you want to end this?" It used both hands to bounce the Breasts, Twilight's eyes looked at them instantly. She couldn't really concentrate and her body was getting hot and wet every second she stared at it, she had to fight the urge, but her mind had another plan.

"Ok... i won't fight" She said out loud to the thing with her voice slightly shy. "But could you at least let me... dress appropriately for this?"

"Sure... get yourself confortable for us; for all of us" It was really confident, it would have control over the whole group of friends. Twilight changed from clothes, she was wearing purplish stockings and a see through top and no underwear, her pussy was exposed; she was holding her hands on her back and her eyes weren't able to look at Sunset. "Look at you, what a cutie in those clothes" It claimed with everyone behind Sunset.

"I... have a suggestion, would it be possible?" Twilight asked and it answered with a simple nod. Twilight changed her face from shy... to pure anger. "Leave my friends.... ALONE!!!" She activated something with her phone, that was holding with both her hands on her back, the speakers on Sunset's bedroom started to do a very uncomfortable sound it wided it's eyes after hearing that awfull sound and noticing Twilight had ear plugs.

"You... bitch... tricked us?!" They all fell to the grounds as the sound was getting more and more intenset, but it negated to not fight, it standed up as it was slowly falling off Sunset's body and her friends, getting out of their bodies and merging on a pile on a side of the room. It leaved all of their bodies. "T-Twilighit..." Sunset spoke. "What is going... on?" She fainted on the ground.

"Don't worry Sunset, i'll take care of this" Twilight grabbed a device from the backbag she bringed and activated it. "You won't hurt anyone again" She threw it to the pile and it combusted quick leaving nothing behind.

It was finally over...