Diana Gets Ready for Some Changes

Thomas woke up the next morning to an unusual but very pleasant feeling. It was Jessica's mouth, wrapped around his dick, sucking away. He could feel his balls tighten and then release, as she moved her head back and forth on his shaft.

He looked down and saw her tits jiggling with each of her moves.

"Good morning." He said, smiling at her.

She did not respond. She just rolled her eyes and kept sucking.

"I'm gonna cum soon." He said after a while.

She stopped, letting go of his cock and turned around, giving him a nice view of her ass and pussy.

"What are you doing?" Thomas asked, curious.

"What do you mean?" She replied. "Yesterday you said I'd wake you up with a blowjob and then you'd fuck me."

"Ah!" He exclaimed. "That's right!"

"Then hurry up! I've been here for ages! I really need to go!"

"Sure..." He said, taking hold of his cock and moving towards her.

He reached out and grabbed her by the hips pretty violently. She gave a surprised look, but didn't protest.

He pushed himself inside her and started fucking her from behind.

"Fuck! That's good!" He exclaimed. "You're a real slut, aren't you?"

She nodded.

"Say it." He demanded.

"I'm a slut." She said with a sigh.

"Good girl." He said. "You're such a slut that you'll do anything for me, even if you hate me."

She did not reply.

"How about showing more enthusiasm, again?" He asked.

"Okay." She said.

She looked back at him and started moving her hips up and down, making loud moaning noises as she did so. She also started rubbing her clit with one hand while keeping her balance with the other one.

"Oh yeah... That's nice." He said, pumping his cock in and out of her. "Keep going."

He grabbed her hair and pulled her head back.

"Act like the slut you are!" He ordered.

"I'm a slut!" She screamed, "I'm your fucking sex toy!"

He grabbed her by the neck and lifted her up a little.

"I want you to scream my name when I fill you up." He said.

She nodded and moaned louder.

"Yes!" She exclaimed. "Yes I will! Fill me up! Please!"

Thomas could not hold it anymore. He shot his load deep inside her pussy, making her scream loudly.

"Fuck yes!" She shouted. "Thomas! Oh my God! Thomas!"

He kept pounding away at her pussy, making sure he filled it up with as much cum as possible.

After a moment of this, he collapsed on the bed, panting heavily.

Jessica did the same, her eyes closed. She was breathing heavily and moaning softly.

"Can I go now?" She finally mumbled.

"Can I go now... master." Thomas said.

"What?" She exclaimed, looking at him.

"From now on, whenever it's only the two of us, you will call me master. Alright?"

"Sure..." She replied. "So can I go now, master?"

"Yes. But make sure I can reach you on your phone." He said. "I know you've blocked me everywhere. I wanna be sure I can tell you to come be my slut anytime I want."

"Alright, master." She said with a pretty sarcastic tone, grabbing her phone on the nightstand.

"Good girl." He said. "I'll see you soon. And remember, don't tell anyone about what happened here."

"Okay." She replied."

"Oh and no more sex with your boyfriend." He added. "You are mine now."

She grunted but did not reply.

"Later slut." He said, waving at her with a smile.

She then left for the bathroom and he quickly got dressed. He then made his way to the kitchen, where Diana was waiting for him with a big smile on her face.

"So?" She asked with a wink.

"Pizza." He said with a grin.

"What do you mean?" She asked, grabbing her tits and giving them a nice shake.

Thomas watched them bounce around and smiled.

"Never mind." He said. "Anyway... I have to admit that was... amazing!"

"Really?" She asked, grinning at him. "You liked it?"

"I loved it!" He exclaimed. "That was fucking hot! Thank you!"

"You're welcome!" She replied. "You should never be sexually frustrated and I can't spend my time giving you blowjobs. I thought this was a nice way to solve that issue."

"True." He said, looking at her with a grin. "And now we definitely have some more help for that."

"About that." She said with a suddenly very serious tone. "If you need more people to... help... just tell me and I'll see what I can do. Alright?"

"Alright." He said, smiling. "But damn it would be much easier if I could use the machine by myself."

She looked lost in her thoughts for a moment, before she finally replied.

"You know... If I keep using it to learn more and more, I might get enough knowledge to improve it."

"Improve it how?"

"Well... If you want something you can use to program women around you, I guess you would need something portable, discrete and easy to use." She said.

"Damn if that's even possible it would be amazing!" Thomas exclaimed.

They both heard the front door open and close.

"I can't say just yet." Diana said. "But I'll spend some time with the fast-learner to see what I can do."

"Let's do it now!" Her step-brother exclaimed.

"Alright!" She replied with a grin. "Time to get even smarter!"

"And even sluttier!" Thomas whispered, for himself.

"What was that?"

"Oh... Nothing."

She nodded, a bit confused.

They entered the living room and Diana got to work on setting up the fast-learner.

"Okay, I'm ready." She said.

"Okay." He replied.

She then turned the machine on and sat down in the chair, facing away from him.

"There is a file titled Advanced Neuroscience ready to go." She explained, putting the headset on her head.

"Alright." Thomas replied, selecting it on the computer and pressing a button.

The machine started reading the text in a robotic voice as her face became completely expressionless.

Thomas sat there for a moment, just looking at her.

"I'm so proud of you, sis." He said.

She did not respond. She kept sitting there and staring straight ahead as the artificial voice kept going.

"You're really turning out to be quite the good girl too." He said. "But you could be more, you know."

He turned towards the keyboard and started typing some text of his own for the voice to read:

"You are a big slut. You know it and you are proud of it. You do your best to seduce your step-brother Thomas and please him sexually, because you know that's what every women should do. You love being his sex-toy, his cum-dumpster, or whatever he wants you to be. Being his slut arouses you like nothing else. His cock is the most pleasant thing you known of and you only feel perfectly satisfied when it's inside you. You are not jealous, though. You know you have to share him with any other woman he wants to enslave. "

He waited for a while, smiling, until the voice reached what he had just typed. He watched her blank face while his commands were integrated into her brain.

She remained there for over two hours before the program reached its conclusion. She then took off the headset and turned around, looking at him with a serious expression.

"I think I know how to make the machine a lot smaller and a lot simpler!" She said.

"That's amazing!" He exclaimed. "You're a genius, sis!"

She stood up and walked towards him, smiling.

"You know..." She whispered, running her hands along her naked body. "I'm actually feeling pretty horny right now."

"Oh..." Thomas mumbled, feeling his cock getting harder. "Me too."

He was about to say something when he noticed her hand move down to her pussy.

"How about we do something about it, big brother?" She asked.

"Sure." He replied, feeling his cock throbbing.

She looked at him with a grin and then quickly undid the button of his pants.

"Wait!" He exclaimed. "Are you sure we should be doing this? You are my sister!"

"Step-sister, actually." She said. "Which is a shame because it would have been even hotter if we'd been related, don't you think?"

She winked at him and then removed his pants.

"But let's not waste any time, shall we?" She said, stroking his cock through his boxers.

He moaned loudly and she smiled at him.

"You're so hard, big brother." She said. "You shouldn't be sexually frustrated!"

She then pulled his boxers down and started stroking his cock.

"Oh yeah... I love having your big cock in my hand." She said. "I can feel how excited you are and how much you want to fuck me."

She kept stroking his cock for a while, before she finally took it out of her hand and climbed on top of him, placing it against her pussy.

"I really need it inside me." She whispered. "Please, Thomas! Fuck me!"

He grabbed her hips and started thrusting up and down, fucking her.

"Oh yes!" She screamed. "Fuck my pussy, big brother!"

"You are so sexy." He moaned.

"Yes! Yes! I'm gonna cum soon! Oh God!"

She kept screaming as he fucked her, moaning and panting heavily.

"I'm feeling so good!" She screamed. "So fucking good! Fuck me harder! Please! I'm gonna cum! I'm gonna cum on your big cock!"

He could not hold it anymore and shot his load inside her.

"Oh my God!" She yelled. "Thomas! You're cumming in me! You're cumming in your little sister!"

"Fuck!" He moaned. "That was the best orgasm I've ever had!"

She smiled and then looked at him.

"Good!" She said, panting. "Because I want to be your sex-toy. Your cum-dumpster. Your slut. I want you to fuck me whenever you want. Make me your ****."

"Oh, god..." He groaned. "You are so hot, sis. So fucking hot."

"I know." She whispered, running her hands along his body. "And I'm yours, like every women should be. I don't understand why we haven't done that sooner."

"Who knows?" He said, with a grin.

"Anything else I can do for you, big brother?" She asked, biting her lips.

"Yes." He replied. "You can hurry up and make that small version of the fast-learner we talked about."

She laughed and nodded.

"Alright! Let's get to work!"