As Masachika presses her right thumb on to Alya's power button, her parts starts emitting a gentle blue light, indicating that she is turned on.
Not a second later, she responds to her activation.
"Huru huru - huhu hu-huru~"
"...What is that hum? It sounds like a game's intro song..." Masachika said while scratching his head.
"I don't know. She never made that noise before." Yuki replies, being as shocked and confused as he is.
Alya starts to open her eyes, and begins to speak with the AI core's assistance.
"The host is an installed brain named Alisa Mikhailovna Kujou, nickname: Alya."
"The installed brain's preferred owner recognized. Masachika Kuze."
"Save data loaded..."
Masachika wonders why is Alya acting like a game console.
"Scent recognition, facial recognition, speech recognition, all indicates it is the genuine Masachika Kuze."
"The host feels joy and happiness after seeing the owner is still in good health and doing well."
"Yuki Suou, a friend, also incestuous homewrecker, is also recognized."
"Oi, who are you calling incestuous homewrecker- Oh right..." Yuki stops mid-sentence as she realizes her pregnant belly.
"I am Aida, Photon-imbued AI core from Oracle fleet."
"I will fill the role of the host's missing brain function to fulfill this body's role as a sexbot."
"I will also help the installed brain to communicate, as it has lost its ability to do so."
"Those aliens really have some crazy advanced technology..." Masachika says with amazed expression.
"...Yeah. No wonder humanity lost." Yuki adds.
Alya... or rather Aida, starts biting on Masachika's zipper and slides it down.
"Oh, looks like Alya wants to help you to cum." Yuki teasingly says to her brother.
"Oh shit... It's really going on now?" Masachika said in disbelief.
Masachika stares at the sexbot with utter disbelief for this situation... and upon himself.
His girlfriend becomes a sexbot involuntarily, and despite the fact that it's only a few moments after he grieved for her...
He can't deny that he has pent-up desires that he needs to let out.
He looks down to the eager Alya... or Aida... that wants nothing more than to service his sexual desires and fulfill her role as his sexbot.
Even though her body is mostly synthetic now, he can't deny how accurate and faithful its design is to Alya's original body.
His past memories of fucking Alya senselessly flood his mind and cloud his judgment.
"Let me help you there, pathetic sexbot..." Yuki said degradingly while taking my pants off.
Somehow it turns Alya even more, symbolized by the heart symbol appearing on her prosthetic eyes.
"It's just like a porn doujin, isn't it, big bro?" Yuki asked her brother smugly.
Masachika knew that Alya was a submissive girl who likes to be dominated.
Now that he can confidently say, that it is Alya who is sucking his dick, not Aida.
With that in mind, he finally grabs her hair while staring at her eyes.
"The host is aroused. Please make use of the sexbot's mouth pussy to relieve yourself." Aida said for Alya.
Alya begins her usual habit whenever sucking his cock, from inhaling the musky scent of his cock, kissing the tip, licking its underside, tracing its veins, and eagerly drinking his pre-cum.
"Shit, It's really Alya... Yuki, you mad brocon, you really preserved Alya..." Masachika said while having his cock sucked for the first time after more than 50 years.
Yuki winks and grins towards her brother.
"Anything for you, my brother. But this is boring..."
"Let me just turn the heat up a little..."
Yuki grabs Alya's synthetic hair and starts controlling the flow of the blowjob.
"I can't really fuck with him now because of my current pregnancy, but I'll make use of Alya's slutty mouth pussy to get you off instead!"
"Don't hold back, big bro. Remember, this is your exclusive sexbot. Make sure its purpose is fulfilled..."
Masachika's dick throbs with excitement hearing Yuki's dirty talk.
He also noticed Alya's nipples has become erect and stiff. It looks like she's really enjoying this.
Pool of sticky liquid quickly forms on the floor as Alya's pussy gapes and drools for a rough fuck session.
Masachika is not the only one who wants to relive the old times in bed.
Yuki then takes Alya's head lower, forcing Alya's lips to touch his scrotum, while her nose are grinding against the base of his cock.
"This ballsack is where the sperm cells that knocked me up comes from..."
"You better service it well, you have to make it worthwhile for me! Buying your new body cost a dent in my fortune, you know!" Yuki said sadistically towards Alya, who's enjoying every second of it.
Alya starts licking and kissing Masachika's hanging, wrinkly, and hairy ball sack in her lust, making obscene noises using her mouth.
"Mnnh... Mngh..." Alya whimpers while letting Yuki use her head as an onahole for her beloved man.
"Good girl... You better earn the money I spend on you back..." Yuki said while playing with Alya's nipples and anus.
"Alya... I... You wouldn't believe how much I missed this..."Masachika said while enjoying Alya's cock worship.
A few minutes later, Yuki pulls Alya's face away and pries her mouth open wide with her fingers.
"Open that oral sex hole, Alya. Get ready to have your throat impregnated." Yuki whispers near Alya's ears.
"Yuki, you degenerate bitch... You read too much ero-manga..." Masachika said to Yuki.
"They are called ero-doujinshi and I love them!" Yuki proudly claims, defending her pastime as cultured.
"Now stop talking and just fuck her mouth pussy good!"
Masachika finally let his lust loose, and starts thrusting his hips, fucking Alya's mouth.
Yuki moves and controls Alya's head, using it as an onahole for her brother's dick.
Alya's tongue starts wrapping his cockhead, coating it with her saliva all over.
"It's kinda sad big bro's precious sperm will go on a fruitless journey of egg hunt into your throat."
"Make sure you accommodate them all into your stomach, got it, Alya?"
Alya nods submissively, while the heart icon on her eyes display screen turns bigger and brighter.
Masachika grins sadistically, enjoying the feeling of domination and the sight of his girlfriend who once used her mouth to reprimand him and hide her feelings deliberately from him...
...Reduced to a slutty mess who now uses her mouth to suck his slimy throbbing erect cock because she's horny...
...That he and only he alone exclusively can enjoy.
Yuki joins the fun by licking and kissing Alya's bulging neck, bulged his brother's cock inside Alya's throat.
"Yuki, you little succubus... Mom and dad would have to apologize to our ancestor for giving birth to such a slutty incestuous girl like you!" Masachika said, speaking dirty towards his own sister he impregnated.
"They should apologize for giving birth to a man with such peerless cock and irresistible charms instead, sisterfucker!" Yuki retorts.
"This fuck pole... just need one shot to turn me into your pregnant cum addict... What a cheat item..." Yuki adds.
Three minutes later, Masachika feels his orgasm approaching.
"I'm... I'm about to cum... Alya..." He said while thrusting his hips harder towards Alya's head, facefucking her deep and hard while his balls sways and slap her chin.
"Let it out, my brother! Knock her mouth up!" Yuki said as she grabs and fondles his balls gently.
Alya stares up impatiently, begging for her sticky and smelly reward as soon as possible.
"UGH! ALYA! YUKI! I'M CUMMING!" Masachika screamed as he ejaculates.
Alya orgasms at the same time, squirting all over the floor.
Masachika pants heavily, his breath ragged after such intense blowjob session after a long time.
His cock twitches as hot jets of semen filled with virile sperm shoots out his urethra, filling Alya's mouth with it.
Alya sucks on his spent cock like a vacuum cleaner, trying to get as much semen out as possible.
"Don't you dare swallow all the good stuff alone, Alya!" Yuki said as she chokes her neck and pry open her creampied mouth to present to her brother.
Masachika stares down, carefully enjoying the view of Alya's inseminated oral cavity.
A yellowish and foggy viscous liquid pool on Alya's lower mouth. It's definitely his semen.
Alya is so happy and satisfied, she doesn't even mind that some strands of his pubic hair are inside his mouth and on her lips.
"Ah... 50 years old cum from my brother... fresh from the source, nonetheless!"
"No wine can ever compare to this..." Yuki proclaims, worshipping his cum like a holy liquid gold.
"I want to drink it... No... I need to drink it... I can't say I love you if I don't..." Yuki said with deranged persona, as if she's an addict.
Yuki kisses Alya's cum filled mouth, while Alya gives in to her advances. They eagerly share the precious semen of their beloved man with their mouth.
Yuki trades and mix the cum together with his saliva, using her and Alya's tongue.
Both of them are in trance, trying to make it look as lewd as possible for their beloved.
"This is so fucking hot... Most man in the world can only dream of this to happen..." Masachika said to himself.
He realizes that even though Yuki didn't interact much sexually with him, she's the one leading it all.
"Yuki, if I can't enjoy vanilla love making anymore, I'm blaming you." Masachika said to his sister, turning an accusation into compliment for her sexual creativity.
"Heh, just as planned, then..." Yuki said to him, mimicking a line from an anime she watched long ago.
Masachika then takes a video of their action on his phone, not willing to one day forget the amazing scene happening in front of him now.
"Fuck... I love you both so much... I'm so blessed..." Masachika confessed while being in the afterglow.
"I love you too, brother. And your penis too, as well." Yuki said as she gives her brother's cock an approving kiss on its tip.
Alya follows suit, mimicking Yuki.
"The host also loves the owner and his fuck organ." Aida stated.
Masachika recorded everything with his phone.
"...This is the porn of millennium." He declared. "I'm going to get hooked to this..."
With his sexual needs satisfied, Masachika starts to help Alya and Yuki clean up with a tissue
"I'm sorry that I immediately just went for... fucking your mouth after our reunion, Alya..."
"I should have started with a 'Long time no see', a warm greeting, and hug, shouldn't I?"
Yuki pats Alya's head and kisses her cheek as she explains about Alya's artificial body more like a saleswoman.
"No need to apologize, my brother. Aida adjusts her arousal level to always be equal to yours."
"It even makes her orgasm whenever you reach yours."
"As a bonus point, every last bit of cum you pour into her holes will refill her energy."
"She's the perfect onahole, isn't she?" She said while pinching Alya's cheek.
"...The aliens really have better techs than us." Masachika said in defeat, knowing humanity is not yet ready for developing or utilizing technology like Alya is using now.
"Anyway, do you want to say anything, Alya?" Masachika asked.
Aida immediately replies with cumbersome tone.
"Host will discuss something that may ruin the pleasant feeling from earlier activities."
"Host Alya is filled with regrets. She wants to inform you that her child with owner, which is you, has been killed."
"I already know that." Masachika tells Aida.
"Further procreation is also impossible. Her uterus was too damaged to be salvaged."
"Host apologizes for meeting the owner in incomplete condition."
"Host is worried the owner will find her less attractive due to her defect."
"Host wishes that the owner will at least still see some values in her by being his sex slave."
"Analysis: Detecting the emotion of regret, sadness, anger, and lost."
"Suggestion: provide comfort immediately."
Masachika knows that Alya always wanted to be a mother of his children.
Seeing his girlfriend in her lowest, he hugs her tight in his embrace, as his hands runs through her hair.
He closes his eyes and try his best to let her know what he felt about her misfortune.
"It's not your fault, Alya..."
"I will never hate you for that. It's okay."
"We will avenge our baby, okay?"
"There there... I'm sorry for not being there for you."
"Like Yuki, I have abandoned you... When you needed me the most."
"But don't worry, I'm here now. It's going to be okay."
"Trust me, Alya."
"No matter what, you are my beloved girlfriend."
"It will never change, not then, not now, not for another 50 years or even 10,000 years."
"I will always love you."
Aida starts assisting Alya to convey her feelings to Masachika.
"Host feels grateful towards owner's unconditional love."
"Reciprocating..."
Alya hugs him back tightly, with Aida assisting her to show her expression.
"I will fucking burn A3 down for making you and our child suffer like this. This I promise for you." Masachika promises to himself and Alya.
Yuki, even though she's deadly jealous of Alya, decides to pat her shoulder and give her some encouragement.
"I'm here for you too."
"And... I guess you can consider my baby as yours too, seeing we got knocked up the same time..."
"I know how attached a mother is to her unborn baby, so..."
Yuki tries to cover up her effort to cheer her up as something usual.
But both Masachika and Alya knew she can't help herself but to offer her hand when she knows her friend needs one.