Two years later

John sat with his legs spread wide, on the Kim’s couch. His bare ass firmly imprinted in the comfortable and expensive cotton cushion. Mei Kim knelt between his legs, suckling the head of his huge cock. He flicked through the channels on TV casually as his MILF mistress sucked him off.

“Ohh! Mrs. Kim!” John groaned, looking down at her with a smile. Mei had long since given up on insisting that John call her ‘Mei’, truthfully he thought it was hotter if she stayed ‘Mrs. Kim’.

“Hmm.” She laughed subtly, releasing his knob from her mouth, holding and stroking his length softly. “You ready to give me another load?”

John was about to respond when he heard the front door open.

“Yumi, I thought you were having dinner with Justin’s family tonight what are… oh, it’s just you Xing.” Mei called out, before resuming her sucking.

“Hey Mr. Kim.” John said, resting a giant hand on Mei’s head, not looking up at her husband.

Xing Kim walked into the room and nodded his head courteously, “Hello John. Hello Mei.” He smiled politely, watching his wife suck off the young stud.

“How was your day, honey?” Mei asked, only momentarily stopping her guzzling before resuming.

“It was good, and yours?” He returned, in his usual upbeat yet stoic manner.

“Mmm.” She moaned popping off John’s stick, “I had a good day too. What’s for dinner?” She smiled again returning to fellate her lover.

“I will make Pho.” Mr. Kim called back, walking out of the room untying his tie casually.

John smiled to himself as he thought about how awesome his life had become after the Master PC had found its way to him. Shortly after graduation, Mei had offered John a room at the Kim residence; mostly because she wanted more convenient access to have sex with him, but also because she felt sympathy for his living standards. John snapped up the offer and moved in to one of the modern mansions many spare bedrooms. She had also offered him a job in her boutique; again mainly because she wanted to fuck, but also because the store needed a strong hand in the packing room to lift boxes and such.

John’s cock was now fully erect again, and Mei climbed up to straddle him, inserting his massive pole into her hot and hungry cunt. One of the many changes John had made to himself was an increased sexual stamina, he initially gave himself full control over his erections, but found it more enjoyable to let them occur naturally. Another change he had made in the last two years was to the size of Mei’s breasts: it had been a long project, taking nearly fifteen weeks, but Mei now had a beautifully perky pair of D cup breasts. He sucked on her incredibly sensitive nipples (another change he had made was making her erogenous zones far more susceptible to his touch), and listened to her approving moans. Mei ground herself down on him, loving the way his meat always found just the right spot. John had toyed with how much pleasure she could receive from his cock, initially he made it as much as possible, but found that she could barely keep him inside for very long. He eventually found her sweet spot, giving her **** pleasure from sex, but not so much that she would be a twitching and quaking mess.

The dynamic in the household had, of course, become exactly as John wanted. He had increased Mr. Kim’s tendencies towards asexuality, as well as openness to allow his wife sexual freedom so much so that John had essentially become Mei’s living fuck toy. John had no intention to humiliate Mr. Kim, as he had shown him nothing but kindness and respect, so he dulled the shame in him with the help of the Master PC.

Mei had retained the sex drive of an eighteen year old slut, easily keeping up with John and relieving him of several loads a day. John had changed her desire to cheat almost as soon as he moved in, and instead encouraged her to remain faithful to Xing. He changed her perception of him to be more of a necessity for her needs; needs to which her husband could not meet.

John felt her wet pussy clamp down violently on his rod, as she thundered to one of many orgasms for the day. His lips still wrapped around her nipple, he bit down gently, and her cries grew louder. John humped upwards feverishly, and found his way to his own climax. Sending thick ropes of jizz into her womb; taking advantage of another change he made long ago, which was to make her infertile (a change, he was assured by Jane, could be undone).