It's at this point that I start delving into complete fanfic rationality for the sake of fanfic lemon territory, but hey, when in Rome you know? If the lack of logic in the scenario spoils the lemons for you, then I'm sorry, but perhaps try not to take it so seriously?
"So she's in here?" Mako asked, Satsuki nodding. "To be honest, we weren't really sure she was real at first, but all the tests confirm it. Its Nui."
"But how?" Mako questioned. "I thought Nui died when all the Life Fibers did." "So did we," Satsuki said, "We don't really have a concrete explanation for it, but what we know is this: It's Nui, she's alive, she's got both her arms and even her eye back, but she doesn't seem to have any of her usual abilities; hence her not having escaped her cell yet."
"How is that even possible?" Mako asked, looking inside at Nui, seeing that it was indeed her, only now she had both eyes, and was squirming madly to try and break the bindings holding her to the table she was tied to.
"We aren't one hundred perfect certain, but the working theory is that after Ragyo was killed off and all the Life Fibers began dying, Nui's brain, the human half of it that contained self-preservation instincts, purged whatever was left of Nui from the Life Fibers. The DNA reformed into a human body, and now," Satsuki gestured to the struggling, hissing, raving Nui in the other room.
"At the moment, she's harmless, but if her abilities ever return, she could be a threat to the entire world." Satsuki continued, "That, Mako, is where you come in." "What? Me? How?" Mako questioned in confusion. If Ryuko hadn't even been able to really kill Nui, how was she supposed to?
"After running a few tests on her, we've determined that there is one gap inside Nui's mental barriers that we can exploit," Satsuki said, "Lust. Before it was never a problem for her, as the majority of her lust and love was directed at Ragyo and the Life Fibers as a while; and with her unshakable loyalty, nothing was going to break that connection, especially with her only other sexual interest being Ryuko, who had no interest in her.
"Now, however, with no Life Fibers left on the planet and Ragyo dead, there's an empty space inside her. If we can fill it and get her on our side, then we could prevent her from doing any further harm. Unfortunately, since we can never know for sure if she's truly with us, whatever we used would have to also have some sort of power over her, be it physically or mentally." Satsuki explained, "And there's only one thing we can think of that fits the bill."
"What's that?" Mako asked curiously. "Mako, have you ever heard the term 'mind break'?" Satsuki asked. When Mako shook her head, Satsuki explained, "It's a word for when someone receives so much pleasure that their mind is actually effected by it. It can cause them to black out, and more importantly, it can make them identify themselves as a submissive to their master, the person who mind broke them in the first place. Mako, I believe you are the only person we have that is capable of sending Nui into a mind break state."
"Whaaaaaaat!?" Mako exclaimed, "Me!?"
Satsuki nodded, "We've run the numbers. There aren't any men, women, or even other futas anywhere close that have your endurance, size, and capacity to make others feel pleasure. Even when you were in your two star goku uniform and raping her, Ryuko still came from it. I sincerely doubt she would've had it been anyone else."
Mako nodded, "So, all I need to do is fuck Nui?" "Not just fuck her," Satsuki corrected, "You need to fuck her until any and all aggression she puts up towards you or anyone else has faded, and she begins to beg for more. After that, she'll be completely obedient to you, and you may do with her as you wish."
Mako nodded, smiling. This mission was sounding less scary by the second! "Alright, I'll do it!" Satsuki nodded, and opened the door, "Take as long as you need."
Nui stopped squirming when she saw Mako, and chuckled to herself bitterly, "What, now they're sending weaklings like you to torture me? That's rich."
Nui was actually surprised when Mako shook her head, "No one is going to torture you." Mako said with a smile, walking over and gracefully ripping Nui's clothes off, leaving her naked and strapped on her stomach to the table. Nui was confused for a moment until Mako undressed herself, showing her large member, already hard from the sight of Nui's naked body.
Nui burst out laughing, "Is this some kind of joke? You think, what, you give me a good fuck and we'll just be friends all of a sudden? I'll forget what you did to lady Ragyo!?" Mako moved behind Nui, lining up her tip to Nui's exposed slit, "Yeah, pretty much." Mako said, hilting herself inside Nui in one thrust.
Nui yelped loudly, as she'd never taken anything that large inside her before, though not for lack of trying. After a few moments, Nui started moaning as well. The pain didn't fade as the pleasure set in, but honestly, Nui probably would've been upset if it didn't hurt. "N-not bad for a worthless little-" Nui's insult was cut off by a hard smack to her ass that made her cry out in a mix of pain, surprise, and begrudging pleasure.
"From now on, you aren't going to insult people. Understood?" Mako said, smacking Nui's ass harder and leaving a large red mark on the left side. Nui shivered at the slap, and stayed silent, receiving two more smacks before she was unable to resist moaning when they came. Nui remained silent in the hopes of earning more smacks, but none came.
When Nui looked back and Mako in question, Mako replied, "You won't get any more until you say, 'I will not insult people anymore'." Mako said. Nui scoffed, refusing to say anything. So what if she wouldn't spank her? Sure it felt good but she didn't need it, didn't need to feel the sharp, sudden sting on her ass as pain and so much pleasure shot through her body while she was fucking rougher and rougher like the good little pet lady Ragyo had made her...
Okay, so maybe she did really want it. Still, she wasn't going to give Mako the satisfaction. This plan started to backfire when Mako started to slow down her hips, moving less and less until she was barely moving at all. Nui had been so close, and now it was her who was being denied satisfaction.
They went on like this in silence for several minutes before Nui muttered something under her breath. "What was that?" Mako asked, not speeding up. Nui repeated it, just as quiet, possibly quieter, than before. "Didn't quite catch that." Mako said. Clenching her teeth in frustration and closing her eyes, Nui quietly said, "I will not insult people."
Mako smiled, immediately pulling Nui's hips and thrusting her cock in deep before raising her hand high and bringing it down in a hard smack against Nui's ass that made her cum instantly. Nui was never done after just one climax, far from it, and she was grateful that Mako didn't stop either. "Again." Mako ordered, raising her hand. Nui tried to resist, but the temptation was just too enticing.
"I will not insult people." Nui said again, being rewarded with the painful punishment she desperately wanted. Mako continued to smack Nui's ass, getting harder and harder each time as she had Nui denounce all her rude, mean, evil, cruel, and otherwise unkind behaviors one by one; receiving more pleasurable punishment in return. Whenever Mako saw Nui hesitate, at first she'd start to flow down her movements and wait for the lack of pleasure to get to Nui's head, but then she realized that controlling her with fear was kinda cruel and wrong.
So she changed tactics, and whenever she saw hesitation from Nui when she was asked to denounce one of her former cruel beliefs, she'd pick up the pace, smacking her ass harder, thrusting her cock in deeper until she bottomed out and came inside her. After about an hour Mako switched to Nui's ass, which was kind of a mistake. Nui was tighter than Mako's brother, mother, Ryuko, Gamagori, and pretty much anyone Mako had ever been with or had ever thought of being with.
This extreme tightness, matched with Mako trying to hilt herself in one go, let to Mako cumming after only a few minutes of fucking Nui's ass; which wasn't too bad really, seeing as Mako was still hard and Nui was more out of it than Mako was.
Mako kept up this strategy, getting rougher, pumping her rod into Nui faster, harder, deeper, until Nui wasn't giving in to a request, but indulging in a reward. Mako's system had Nui happy to say what Mako wanted her to, as opposed to doing it out of spite. Even with this method, Nui was still stubborn, and it was four full hours before Mako finally got her to promise never to hurt a single person in any way, save for self-defense in worst case scenarios.
Even then, Mako still wasn't certain she trusted Nui, not after everything she'd seen Nui do to people. So, as a final test, Mako pulled out of Nui, who at this point was so far gone from all the fucking that she whimpered without Mako's dick inside her, and moved in front of her. Mako held her still solid rod (a feat made possible by the energy drinks Satsuki had provided, designed to increase stamina and endurance in both the short and long term) in front of Nui's face.
Nui didn't even hesitate to push her head forward, licking Mako's tip vigorously, as the tip was as far as she could reach. Mako moved closer, letting Nui take more and more of her cock into her mouth and throat inch by inch. Nui began sucking Mako off without even needing to be ordered, as by this point she was so lost in pleasure, that she was getting off on pleasuring Mako. She was officially mind broken; Mako's new personal sex pet.
And to celebrate, Mako grabbed Nui's head with both hands and pushed it down as she thrust forward hard to skull fuck her.
Another half hour had passed. Nui had fainted and woken back up again, Mako never stopping until she finally came; filling Nui's throat and making her gag on it, which she actually seemed to love. Mako rested for a moment before hearing Satsuki over the intercom.
"Mako, how is it going? Is it done yet?" Satsuki asked. "Um..." Mako said, looking down at Nui, who was peacefully licking Mako's tip, looking up at her with big, pleading eyes to ask to be skull-fucked again. "Not yet. I'll probably need another...few hours before she's broken."
And that is the last chapter of Futa-Mako I'm writing this year. I'd try to write the finale now, but frankly, I'm not really certain what to write for the finale. I'm strapped for ideas. I had a general idea of involving Satsuki in some way, but I'm not sure what I should really do.
That said, if I get enough reviews with ideas for the finale, then the problem will be fixed now won't it?