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Chapter 7
by Goken
What's next?
Making a twin sisters.
Sarah is aware inhabiting Jessica's body draws a lot of unwanted attention. Regardless, she decided to go clubbing, and waken up in a hotel without recollection of the previous night due to someone spiking some kind of **** in the drinks. However, getting harassed by Jessica on a daily basis in school made her merciless, and the incident accomplished one part of her devious ****.
"Damn, that was an exhilarating experience," Sarah deliriously laughs while gazing at the cum running down Jessica's thigh, "Taking over your body is freaking amazing."
Sarah lustfully curls her lips thinking of all the mischief she can cause and Jessica's vagina begin to dampen.
"Holy shit, visualizing how to mistreat your body made your needy cunt wet."
Sarah searches for her clothing and says, "Damn, they even stole my thong." Giggles, "Guess, I need to go shopping."
Sarah went to Victoria's Secret. With so many varieties of lingerie to choose from, she decided to grab several pairs just in case last night's activities happen again.
"That'll be two thousand and fifty-six dollars." The cashier said and Sarah read the name tag while saying, "Well...Joe, someone had stolen my thong last night."
Sarah smirks noticing him lingering at Jessica's body and lifts up the skirt to reveal the smoothly shaven cunt.
"Pay for the merchandise, and I'll allow you fuck me without protection."
Joe never had much luck in the dating department due to his unattractive appearance, and the offer to pay for intercourse made his cock instantly throb.
"Two thousand and fifty-six dollars is way too much. I could find someone cheaper in Las Vegas." Joe hastate and Sarah teasingly purrs, "True, but will they allow you to fuck them without protection?" Giggles, "Not to mention, I'm not on birth control."
"Are you serious?!!!" Joe asked with excitement and Sarah inform, "Yep, I might end up pregnant."
Joe had taken a brief moment to contemplate and then asks, "Are you clean?"
Sarah giggles at his question while replying, "I'm healthy last time I checked. The question is, are you?"
Sarah glance at Joe's nervousness and had a distinct feeling he was concealing information. Not that it matters, she prefers using Jessica's body without restraint. Unfortunately, for safety percussion, Tommy made his sister immune from any diseases.
Sarah notices Joe's desperation for intercourse and decided to swindle until he's broke.
"Let's make a deal. Add two more pairs of lingerie and you don't need to take any responsibility afterward."
Joe felt something is unusual about her behavior but asks, "You can seduce any guy to sleep with you. Why me?"
"Because I'm a slut with no shame." Sarah mischievously replied while tracing her fingertips across his chest, "Besides, having your sperm fertilizing the ova might be interesting." Giggles, "If you know what I'm implying."
Joe paid for the lingerie and lead Sarah to the storage room. They spent several minutes indulging themselves with unbridled Intercourse. Of course, using Jessica's body to perform an incident act aroused Sarah, but she wasn't satisfied until Jessica's reputation gets destroyed.
Joe wanted to share this moment with his friends and use the cellphone to record the activities.
"Don't forget to post it online," Sarah winked and Joe erupted in the depth of Jessica's womb while resuming to record.
"Did you have fun ravaging my needy cunt?" Sarah asked and Joe cheerfully reply while catching his breath, "I haven't had sex in years, but you surely satisfied my need. Can we continue?"
"I'm well aware you have std, and continuing intercourse might be a problem." Sarah exclaimed while teasingly caressing his cock, "However, there's something else I need to buy, but I'm low on cash." Giggles, "Give me five hundred dollars and you can keep filling my needy cunt."
"My credit card is max out," Joe informed and Sarah slowly made her way towards the exit while saying, "Guess I'll find someone else."
Joe swiftly opens the register and says, "I'm probably getting fired for this, but here is the money."
"You're such a bad employee," Sarah giggled and then lean against the counter, "You have....ugh...two hours to enjoy yourself."
"You're lucky Tommy made your body immune. If he had forgotten, pregnancy isn't the only thing you need to worry about." Sarah subconsciously laughs.
Once the activities were over Sarah went home and toss the shopping bags on the couch.
"Your sister's body is like an atm machine," Sarah said while grimacing at me, "I can literally get any guy to pay for my shopping spree."
"You promise to help me transfer Master PC to my phone." I reminded and then sighs at her uncooperative demeanor, "Come on, you had your fun using Jessica's body. Now fulfill your end of the deal."
Tommy was afraid increasing intelligence might affect his personality, and Sarah had taken advantage of his weakness.
"I would help, but the offer you give me for permanent activation was rigged." Sarah whined at the outcome and I aruge, "It's not my fault you got unlucky. Besides, you wouldn't be complaining if the activation came out permanent. Considering you made Jessica gain twenty pounds each day."
Sarah smirks at my wary expression and says, "Jessica the fattest slut in school." Giggles, "If you give me one more week her stomach will be bulging out of proportion."
"I know Jessica deserves it, but aren't you overdoing it?" I said with disapproval and Sarah deliriously laughs whiles informing my sister's situation, "Not to mention, I have pretty much ruined Jessica's reputation. Since most of the rumors at school are true."
Sarah glance at my angry expression and says, "Fine, I'll help you install the software to your phone. But I can't do it unless you give me access to Master PC." She senses my hesitations and attempts to persuade me, "Tommy, I know you're paranoid. But if you don't trust me, how can you transfer the files without increasing your intelligence?"
"Promise me you won't do anything stupid?" I asked and Sarah replies with her fingers crossed, "I promise not to do anything crazy without your consent."
Sarah retrieves some unusual devices from her backpack and I ask, "What's that?"
"You thought I was only using your sister's body and forgot about the deal?" Sarah said while grinning and then explain, "Since this prehistoric machine doesn't have a micro SD slot, I had to search for an adapter." Giggles, "Of course, I used Jessica's body to pay for it."
"Oh crap, I forgot about the extension cord." Sarah pretends some of the components are missing and asks, "Can you get one from Best Buy?"
"Sure," I said and grab the car keys.
While I'm away from home Sarah installed the software onto an sd card for personal use, and inserted it into her own phone. Suddenly, Rom and Ram appear in front of her.
"Where did you guys come from?" Sarah asked and Ram explain, "Normally, other people can't see us unless they're a user of the software."
"What's your propose?" Sarah asked with fascination and Rom giggled while saying, "Ummm....consider us an instruction interface for Master PC."
Sarah examines the software on the floppy disk and asks, "How can advanced technology to shift realities contains only ten kilobytes?"
"Ummm...that information is classified." Ram nervously replied.
Sarah assumed their unwillingness to comply only mean the software wasn't originated from Earth and was determined to prove the theories are correct.
"I have no record of Sarah obtaining the software. This could be a problem." Ram softly whispers to Rom and she says, "Yeah, we can predict how Tommy going to use the software, but can't do it with Sarah for some unknown reason."
I return an hour later and say, "Is this the correct cord?"
"You're not so useless after all," Sarah giggles while extending her hand, "Give me your phone."
Sarah removes the sd card and inserts it into the adapter. Within a minute Master PC installation was completed.
Sarah reinserts the card into the phone and says, "Congratulations Tommy, now you can use the software anywhere."
"I had a lot of fun with you around, but I kind of miss my actual sister." I said and Sarah place her hand on my forehead while asking, "Do you have a fever?"
I softly laugh at her sarcastic humor and say, "Well....you can't stay in her body forever. Besides, you agreed it was only temporary."
"I guess you can swap back our soul," Sarah said but then mischievously grin while asking, "But before that, can I adjust your sister's body one last time?"
"Oh no, we're not going through that again," I protested and Sarah reassure me, "Don't worry, I won't make your sister obese." Giggles, "Trust me, you might like it. Now turn around for a minute and don't peek."
Sarah went through Jessica's profile and adjust the body like an avatar in a video game.
Once everything is properly adjusted Sarah says, "You can turn around."
My eyes widen with disbelief as Jessica's curvature morph in front of me. I must admit, the proportion came out seductively, and my cock begin to pustulate.
"Do you like my going away gift?" Sarah asked and then grin at my speechlessness, "I'll take that as a yes."
Sarah made her way toward a large mirror hanging against the wall and says, "Shit, I made the slut too damn sexy. Even I'm starting to get jealous." Giggles, "Time to make her overweight again."
I fold my arms to express defiance and she says, "I'm only kidding, Tommy."
"I love having you for a sister. Too bad we need to part ways." I said and Sarah grinned at a particular idea, "Hmmm....how about using Master PC to replicate an exact copy of your sister's body to mine?" Giggles, "And then manipulate everyone to believe you have twin sisters?"
"Hey, that's pretty clever," I gleefully smile at her suggestion but then explain a particular problem, "Jessica still going to be a complete bitch. Wish there a way to shut her up without messing with the personality aspect."
"Have you ever thought of partitioning Jessica's mind like a computer?" Sarah asked and I say with confusion, "A what now?"
"Like two separate operating systems. You know, the main one using windows and another using Linux." Sarah explained while sneering deviously, "This way if you ever get tired of your sister's nagging. You can switch to a different operating system. Of course, we can make that system have any type of personality."
"In other words, my sister's soul will be in the main operating system. The other system will have fabricated personalities to run her body?" I asked with uncertainty and Sarah laughs as she replies, "That's the general idea of how it works, but we need a key phrase to prevent someone from accidentally swapping the system."
"How about Galaga?" I suggested and Sarah raise an eyebrow while saying, "Seriously, you're going to set a key phrase after a video game?"
"Well, it's an old game, and I doubt anyone talks about it much." I give a reason why this phrase is a good choice.
Sarah sighs at my ignorance and says, "If that's a phrase easy for you to remember. I suppose it's alright, but don't blame me if someone's accidentally using it on your sister."
I used Master PC to partition my sister's mind and made everyone believe I have twin sisters. Afterward, I teleport Jessica to our location and swap the soul with their original body, and then say the key phrase before she gets the chance to scream. Soon, Jessica promptly stared motionlessly at us.
"Now, what kind of emotions do you want on this partition?" Sarah asked while grimacing and I reply, "Hmmmm...give her a positive attitude and enjoy sex more often. Also, she is more open to suggestions."
"Alright, Tommy. I'll input it to Master PC." Sarah said but didn't tell me the request might cause some problems.
Before morphing her body into an exact copy of Jessica, Sarah's eyes are drawn to a portrait hanging on the wall.
"Ummm....she's adorable. Is that Jessica?" Sarah asked and I reply, "Yep, that's Jessica at her sixteen birthday party."
"Wouldn't you like a younger twin sister?" Sarah grinned and I cautiously say, "I don't think that's a good idea."
"I'm not asking to change the age, silly. I'm just going to make your sister appear younger." Sarah reassured while laughing, "Besides, I need to stay twenty-one. Otherwise, I can't go clubbing anymore."
I must admit, having younger siblings is an enticing prospect and agreed with her suggestion. Once the setting is complete they plop on the bed while smiling at me.
"Oops, I forgot to add the body modification. Will you do the honor?" Sarah asked and I gleefully give an affirmative nod while pressing the enter keys on the save preset.
"Ready to have your cock suck by two sexy twin sisters?"
I'm having difficulties figuring out who made that statement and Jessica says, "Seriously, you can't tell us apart?"
Sarah giggles at my confusion and says, "Just take out your cock, Tommy. Maybe you can tell by our performance."
As I lay comfortably on the bed and Sarah engulf my testicle while Jessica suck on the main base. Sadly, I never had a double blowjob before, and the experience overwhelmed my senses.
"Ugh...I don't think my cock is capable of withstanding this kind of sensation." I said while struggling to hold on from releasing the load.
"Having twin sisters must turn you on, huh?" Sarah asked and Jessica firmly gripped my member as her hand pumped steadily up and down, "Don't cum too soon, bro. We need it in our needy cunt."
"Sorry but...." I whimper while ejaculating the creamy seed directly towards their face without warning, "Damn...that felt good but I'm exhausted."
"Why don't you go rest in your room, Tommy," Sarah suggested while wickedly glaring at Jessica.
"I'll be back in an hour," I said while plopping off the bed.
"We're going to have so much fun together, slut." Sarah sadistically sneers and then asks, "Do still want a cock in your needy cunt?"
"Yeah, I love getting my tight little cunt ravaged by a cock. But sadly, I need to find some random strangers to fuck me." Jessica replied and Sarah retrieve the cell phone from the purse, "There's no need for you to search."
Sarah use the software to create a large cock above the slit and then explain, "Since I'm an exact copy of you down to the very last DNA. You're going to be the mother and father of your children. Isn't that nice slut?"
"That's kind of weird, but awesome at the same time." Jessica giggled and Sarah swiftly insert the entire member with one sweep, "God, no wonder guys constantly thinking of sex. This sensation is freaking amazing."
Sarah grin at Jessica whimpering blissfully and asks, "Your brother already give you triplets, but do you want to make another set of triplets for yourself?"
"That sound like fun," Jessica agreed due to the personality setting, and Sarah says, "Don't tell Tommy about this. Otherwise...we wouldn't be able to keep the pregnancies."
"My lips are sealed," Jessica giggles, and Sarah hides the pregnancy's setting in a secluded location deep within the software to ensure it can never be discovered.
The next day Jessica attended school and everyone was strangely glaring at her while whispering rumors. With no other choice, she pretends to be Sarah to avoid unnecessary attention.
I was playing Super Smash Brothers with Sarah in the living room when suddenly Jessica enter the building while slamming the front door behind her.
"If I ever find out who spread those rumors. I'm going to fucking **** them!!!!" Jessica frantically screamed and I say, "Galaga."
Jessica's personality swiftly shifts and then says, "Bro, I had a bad day at school. Can you help me release some stress?"
"Sorry, mom drains me dry earlier," I informed.
Sarah approached Jessica and then lean in to whisper, "Do you want to continue where we left off yesterday?"
"Yes, sis," Jessica softly murmurs and Sarah asks, "Before we start, has anyone used the secret phrase?"
"Several nerds from school activate the phrase," Jessica replied and Sarah chuckles while resuming to ask questions, "Besides intercourse, did they make any requests?"
"There's some unusual request, but I'm not unable to grant any." Jessica honestly replied.
Sarah grabs Jessica's wrist while dragging her toward the bedroom, "I'm going to do a few modifications to your personality, and body." Giggles, "When completed, you'll be able to grant any request regardless if it's impractical."
"That sound fun but I don't think it's a good idea," Jessica said with a wary tone and Sarah laughs, "You're going to be on free-use mode when I'm through with you."
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Master PC Adventures
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Updated on May 16, 2025
by ucakeordeath
Created on Oct 6, 2022
by IronLacedCarbon
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