Keeping it local(for now)

Jill and I can talk about Master PC in front of anyone and they won't question us or want to know more, unless we want them to.

This was the first thing that Mark thought to enter when when he returned to his room. He hadn't closed the door and neither has Jill, evidenced by the sounds of Rachel gagging on his sister's cock. If it weren't for the fact that he had just cum, he was sure he'd be rock hard right now, but alas, he wasn't. This set Mark thinking about what future changes they should make. They had enable global changes, though after some consideration, Mark decided against it for two reasons: one, he wanted to mess around some more before he started making worldwide changes, and secondly, he didn't really have any good ideas for what to do yet.

Mark was still lost in thought when Jill sauntered into the room, her bulging cock having been satisfied by her bimbo friend, who followed in behind her. Jill parked her plump rear on the seat next to Mark, while Rachel stood in the middle of the room, unsure of where to sit. Jill, realizing her friend's problem, quickly set about rectifying it

Mark's room contains a chair that has a large purple dildo built into it. The chair itself is incredibly durable. The dildo will ejaculate real cum. This cum disappears after 5 minutes.

The chair materialized against the wall of Mark's room, by the door. Rachel looked over at the chair and practically jumped onto the dildo, riding it desperately. Mark's complete lack of reaction to what she had typed caused Jill to remember that she had turned Mark's awareness of earlier. Luckily, Rachel's vigorous masturbation had caught Mark's attention, and she quickly scrambled to turn it back on, hoping that it wouldn't retroactively inform him of her changes. After she clicked the toggle however, there seemed to be no surprise or shock in his expression, and so Jill considered her little experiment a successful; that the awanress toggle wasn't retroactive was useful information to know, and might allow for some... kinky fun down the line.

However, right now Jill had bigger concerns on her mind. She snapped her fingers in Mark's face, getting his attention, and they set about discussing what changes they wanted to make, Jill agreeing with Mark that it should be local changes for now. Soon they had a few changes ready to go:

Jill and Mark have no refractory period. Jill additionally cannot be overstimulated by vaginal sex, and neither can any of their partners.

Jill and Mark can ejaculate anywhere between 1 and 1000ml. They can control the exact amount that they cum. The maximum amount that they can cum will double every hour that they do not cum.

It was Mark's idea to add that last part, though he doubted that they would be going an hour without coming for a long time.

Public indeceny and nudity laws don't apply to Jill or Mark, or any of their current sexual partners. Additionally, if either are fucking in public, they will be treated like street performers, and may even draw a crowd, though Jill or Mark must will this to happen.

Jill and Mark can control neither their cum can get someone pregnant. They default to being sterile, and it takes conscious thought to make their cum non-sterile. Jill can also do the same with her eggs.

Any woman that has a change made to her with Master PC will not have periods anymore, and will instead gain the ability to release eggs at their own discretion.

This change was Jill's idea

No-one that knows them cares about Jill and/or Mark engaging in any form of sexual activity, even with each other.

Finally Mark had one final change

Mark can look at someone and see a quantified arousal level, and a list of their kinks and fetishes. This requires him to both be looking at a person or people, and to to think that "I wonder what you're into"

Mark had seen one too many stories about telepaths that couldn't turn their ability off and went crazy from hearing it all the time, so added in the measures to ensure that he didn't go insane. Jill had declined this power on the grounds that it took all the fun out of it, and she would rather have a unique power of her own.

However, instead of thinking of an ability for herself, Jill had instead pulled down her her shorts and begun stroking her meaty fuck-stick, already feeling close. It seemed that altering reality was a real turn on for both of the depraved siblings.

Soon Jill had reached the edge, and with ejaculation imminent, decided to test her ability to control her volume, quickly choosing 300ml for no real reason. Jill's hips jerked, and a geyser of cum erupted from her cock, shooting up at the young pervert, and she painted her face and shirt with her own girlcum.

Mark observing this, realised that it was going to incredibly difficult to clean up all of the cum that he and his sister were sure to produce, and so turned to Master PC

Jill and Mark can make any cum they produce disappear with just a thought

Having watched Mark type this, Jill thought "Go away cum", and the cum that had adorned her cute face dissapeared. "Good idea." Jill said, slightly missing the feeling of being plastered with cum. She was about to ask what they should do next when a loud "Ahhmmn" came from across the room. Rachel, seemingly, had cum from riding the dildo-chair. Seeing her reminded Jill of another change she wanted to make, and she hurriedly typed into the text box

Anyone that Jill and/or Mark have sex with have elastic holes, meaning that their holes will stretch to accommodate their cocks. This doesn't cause any any pain or discomfort.

Mark was very intrigued by this change, and watched eagerly as Jill got up and shuffled over to where her slutty friend had begun bouncing on the dildo once again. Jill simply said nothing, put one hand on her hip, and tangled her cock a little in Rachel's face. It seemed that Rachel got the idea, as she she licked her lips and opened her mouth, having settled on the dildo for now. Jill then gently pushed her girlcock into her friend's mouth and watched with awe as she felt inch after inch disappear into Rachel's throat.

Jill, filled with confidence, began to thrust thrust into Rachel's throat, feeling the bimbos younger and throat work her cock in tandem. First she went slow, gently pulling in and out, then she began to pick up the pace, sliding her cock in and out of Rachel's mouth, each time recalling in the felling of pushing in farther than she should be able, then eventually turned to full force thrust, each one causing her to bottom out, Rachel's nose touching her pelvis with each thrust. Pretty soon, Jill felt the new familiar feeling of her balls tightening, and deciding to give her friend a reprieve from swallowing, decide to pull out and finish on her face, and decided to use the maximum volume she could.

"I'm-I'm cu-cuMMING!" Jill groaned, as her cock sprayed Rachel with a liter of cum. Though Jill had only meant to give her a facial, the sheer volume caused it to go just about everywhere, and a significant amount pooled down into Rachel's cleavage, becoming almost a lake of cum.

"Wow." Jill exclaimed, her cock already hard again.

"Wow." Agreed Mark, his cock having twitching.

Over the next 45 minutes, the siblings took turns fucking Rachel, using her mouth, ass, and pussy, pumping well over 5L of cum into her, though they do course disappeared it each time. Finally, after one final blowjob for Mark, Rachel announced that she had to go home, and Mark helped her on her way, Rachel's legs a little shaky from all of the fucking. Jill stayed behind in Mark's room and looked around the room, marveling at the power of Master PC. Eventually her eyes landed on the disco chair she had conjured up and she felt a tingle of need in her pussy. She moved over to the computer and entered

There is an exact copy of the dildo chair in my room

Jill thought back on the changes they had made thus far and wondered if now was the time to test some of them out, particularly the public indecency one. The thought of it made her cock throb.