Sister settings

Emma had been digging through the documentation for hours, to no avail. While there very well could exist a solution for what she wanted (she suspected she had gone over less than 20% of the man pages), she wasn't having much luck finding it. All she wanted was something that would make her sister less uncomfortable from her obvious attraction towards her, without modifying Sarah or giving her the ability to go too far and-

Emma stopped that train of thought. She was already a bit horny from breakfast, and she did not need that sort of temptation.

While she knew that she would probably find something further in the documentation, the fruitless hours up to that point had turned the small, niggling thought of "the only way to fix this was to modify Sarah" into the only thing that was going through her head.

This fix Emma had envisioned would be to make the feelings of attraction mutual. It still wouldn't turn into anything more; she knew Sarah well enough to know that she would not actually commit ****, no matter how she felt. But the mutual attraction would get rid of that awkwardness that seemed to surround so many of their interactions these days.

It was a shitty solution, and Emma knew it, but she reasoned that the nature of their relationship didn't really change; they would still be sisters, who weren't in any way in an incestuous relationship. It would just be stronger, since Sarah would be into her displays of lustful affection, rather than put off by it.

Additionally, while she did want to fuck her sister (overwhelmingly so), she knew that it was wrong to modify her, without her consent, just to fulfill Emma's own desires. Since this change didn't lead to her and her sister having hot, passionate, incestuous sex (her dick was pumping precum aggressively by this point), it must be the right choice.

Right? Well, no. Emma knew her rationalizations were shit, too. But she'd argued and rationalized and debated against herself for so long that it was starting to seem reasonable.

In the back of her mind, she worried that all this was getting to her head. That the ability to bend reality to satiate her most carnal, base desires with just a few keystrokes was testing her limits more than any human could realistically withstand. But at the same time, she couldn't just get rid of Master PC. She couldn't.

With some trepidation, she typed:

--

$ masterpc target:"Sarah Rodgers"

Sarah Rodgers, age 20.

Relation to user: Sister

Occupation: College Student

Height: 170 cm

Weight: 68 kg

Cup size: D

Sexual Experience: None

Genitals: Female (x1)

Orientation: Straight

Fetishes: Free Use

...

Confirm target? [Y/n]: y

--

Emma tried to ignore the pit in her stomach as she made a plan. Okay, set her orientation to bisexual, and add the appropriate fetishes. That should be good enough, right?

She exhaled slowly. You're doing this for your relationship, she reminded herself unconvincingly. This is the right thing to do.

Doing her best to ignore her gnawing conscience and her throbbing, drooling cock, she entered the commands.

--

mpc> set orientation bi

--

The world pulsed.

--

mpc> add fetish --**** --futanari

--

That would be enough, right? Right?

She knew what she was doing was wrong. It went against every moral fiber in her body. But it was too late. Her giga-girldick was throbbing uncontrollably, spraying precum in her bag with such **** that Emma was convinced it was going to slide off. Despair and arousal grew in her stomach as she continued:

--

mpc> add fetish --**** --futanari --big_penis -big_breasts

--

The world pulsed.

Immediately, Emma ripped the bag off of her dick. Lacking the patience to even take her top and bra off, she instead **** as much of her cockhead into her mouth as she could and started furiously jacking it off with both hands.

She had never felt this horny in her life. All she could focus on was her sister, her sister's tits, her sister's pussy. She imagined her trying to wrap her dick between her tits, struggling to take the head into her mouth. Covering her tits, her face, her entire body, head to toe, with her thick, virile girlcum, marking her sister as hers.

Forcing all 20 inches inside her tight, wet pussy slowly and steadily until she bottomed out, her massive girldick bulging obscenely within her sister, its outline clear within her stretched out pussy and womb and pumping until she was cumming, cumming-

Her dick erupted in a geyser of cum. She greedily swallowed as much as humanly possible, still jerking off her cock as fast as she could. She couldn't keep up though, and eventually her cockhead burst free, spraying and covering her in a flood of girlcream.

She kept pumping her shaft as she coated herself. In her mind's eye, it was not herself she was covering in cum, but her sister. She pumped and pumped and pumped until her balls ran dry and her dick finally stopped leaking.

Emma's hands fell down to her sides, exhausted and burning with exertion. She breathed heavily, blissfully relaxed in her post-orgasm haze.

She was still covered in cum, though, even more than last night. She even soaked through her shirt and bra! She sighed, wishing that she could stay like this, soaked in her girly, liquid pleasure.

She focused on the Master PC terminal again. Perhaps she could. There was a toggle she remembered reading earlier today, while . . . while . . . what had she been doing, again? It was something that made her feel terribly guilty, but simultaneously extremely horny. Even the half-remembered feelings were strong enough to make her spent dick twitch, though no more precum came out of her emptied balls.

The more she tried to focus on it, the fainter it became, until Emma decided to switch gears to her cum issue. Licking her hands clean and savoring the taste, she navigated back at the appropriate man page. The command made it so that any sexual body fluids would always stay as warm as it was when it was freshly released, wouldn't ruin electronics, paper or anything else, would eventually evaporate away without leaving any residue behind, and a bunch of other things that would be nice for someone who came as much as her. It was a global switch, sure, but she doubted many other people would be affected at all.

Man, whoever came up with this program sure is a pervert, Emma thought, as she licked the cum off of her lips. It was an acquired taste, but it was a taste she had learned to love over many, many nights of blowing herself.

--

mpc> global set physical --sex_liquids --worryfree

--

The world pulsed.

Emma sighed. If she had lived alone, she could probably get away with being soaked in cum from time to time. It's not like it would hurt anything. But she would definitely get some weird looks and uncomfortable talks from her family. Though, if she did live alone, she probably wouldn't have much reason to masturbate.

Wait. She vaguely remembered something like this from yesterday night. Diving through the manual again, she found it. Part of Social Norms, it altered reactions to sexual fluids, in a similar way to Gaze and the others. Though, unlike the others, it was once again global only.

--

mpc> global set norm --sexual --sex_liquids --positive

--

Briefly, she recognized that she was being a bit too liberal with the global switches, but couldn't bring herself to care.

She hit enter, and the world pulsed.

Man, she was thirsty. Grabbing her bottle, she realized that she hadn't filled it. She'd have to go downstairs to refill it.

But before that, stumbling back onto sexual social norms had reminded her of something. During breakfast, she oh so wished that she could grab her dick and relieve herself while staring at her sister's perfect boobs or her mother's luscious ass. Before she could forget, she typed:

--

mpc> set norm --sexual --masturbation --positive

--

The world pulsed.

Since she'd be back quickly after refilling her bottle, she debated exiting the program or not. Erring on the side of caution (for once), she typed:

--

mpc> exit

$ logout

--

She reached over to grab . . . something. A bag? She didn't need a bag. At least, not right now. It was Saturday, hardly like she needed to go to school. Emma paused, mentally facepalmed, then grabbed her bottle.

Still dripping in her own virile girlseed, Emma headed downstairs, her erection leading the way.

Author's Note:

Don't really have time during the week, so this is likely the last chapter from me till the weekend. Depending on how much free time I get, I may post sometime in the middle of the week (though I make no promises).

As usual, any feedback is appreciated.