As Rias had gone back to Issei's room, Gorou was feeling the sensation of his penis inside Miki's vaginal opening.
He was slightly surprised because the inside of the former biological milf's vagina was tight.
"This slight resistance… was that the hymen?"
A faint trace of blood on the sheet confirmed Gorou's hypothesis, and he thought of the only logical explanation for it.
The abnormally high power of a reincarnated devil's DNA, like Issei Hyoudou's, must have regenerated old (cellular) elements his wife had lost.
He had literally just taken his wife's virginity for the second time, thanks to his son!
A feeling of conquest set Gorou's heart ablaze, making him forget the suction-like sensation from Miki's vaginal walls.
It didn't take long for him to start moving Gorou Junior with a slow motion before thrusting it back into Miki with a sharp snap.
"Aaaah!" Miki screamed, grabbing Gorou's back and digging her nails into his flesh.
It was more of a shrill cry than a moan.
Her newly regenerated hymen had just torn, but the pain mixed with pleasure in the mind of the experienced woman.
Unconsciously, she started moving her hips slowly to match Gorou's deliberate movements.
"Hmm ~"
Finally, pure moans echoed through the room again.
At some point, Gorou grabbed Miki's hips with both hands and began thrusting his penis more energetically.
Apparently, he had already fully explored his wife's intimacy.
Thanks to his new penis, Gorou realized he had only explored Miki's outer entrance until now.
The old Gorou would've been ashamed of this sad reality.
"M… more… ~"
With each thrust, he plunged deeper into his wife than ever before.
His Gorou Junior was touching previously untouched areas, and this realization gave him even more strength to conquer this part of his wife.
Bite.
Perhaps because she was becoming less shy or hesitant, Miki started getting more proactive.
She caressed Gorou's back during missionary and occasionally nibbled his shoulder between kisses.
"What's that?"
For the first time in his life, Gorou felt something other than vaginal walls.
His penis was blocked by something… the cervix.
Gorou was fully inside.
"Haaaehh!" At the exact moment he reached that area, Miki let out another loud moan, almost like a beastly cry.
Unlike the first time, her vulva secreted an insane amount of fluids.
Miki Hyoudou… had climaxed.
"Tch, selfish little thing," Gorou grumbled inwardly, watching his wife lost in post-orgasmic ecstasy.
Was he going to wait?
The answer was obviously no!
His penis, almost fully inside her cervix, started moving again, expressing its desire to dig even deeper.
His movements brought Miki, still hypersensitive, back to reality, but it was already too late.
She was too weakened to explain her state of extreme sensitivity to Gorou.
He grabbed her calves and put her in a position called "captain," where he planned to pound her like a jackhammer.
Bam! Bam!
"Heuuu… ~" A strange sound came out of Miki's mouth, and her eyes rolled back.
Gorou Junior had reached the cervix's limit; going further would be… scientifically dangerous.
"Damn, I'm gonna…"
Gorou decided to trust his wife's new genetics and pounded her like his life depended on it.
The obscene sounds of flesh and bodily fluids echoed louder than ever.
Finally…
"Miki… I'm cumming!!!"
"Heu ~"
He said it out of courtesy, because Miki hadn't been lucid for a while.
She responded to Gorou's movements and kisses, but the overwhelming pleasure had wrecked her mind.
Despite Miki's state, her husband wasn't satisfied.
Despite the intense ejaculation, his penis stayed erect and ready for battle.
"Hold on just a bit longer, Miki."
Despite this terrifying thought from Miki's perspective, Gorou kissed her deeply without pulling his penis out of her.
After noticing a slight return of lucidity in Miki, Gorou started thrusting at a moderate pace before picking up an energetic rhythm again in missionary.
The sensation of ejaculation took longer to arrive this time, and Miki climaxed twice.
Of course, Gorou never pulled his penis out of Miki's vulva and never held back from ejaculating inside.
He was determined to keep his promise to Issei Hyoudou.
"Haaang. Hngh…! Ah! Gorou… Ahhng."
At some point, Miki seemed to get used to Gorou's relentless pace and called out to him in a lascivious voice.
Her delicate hands gripped his back.
That's when she became fully proactive, no longer just reciprocating certain gestures.
"You feeling good?"
"Haa… Yeah… It's the first time… I've felt this good."
"Hngh. I didn't know sex could be *this* good… Ang!"
"Sorry for being a lousy performer before."
Maybe she noticed his clumsiness; Miki's blissful and depraved expression seemed to regain a bit of clarity.
She had literally just admitted that the original Gorou was less skilled than the current one.
But Gorou didn't take it to heart.
He simply decided to punish her lightly.
So, he suddenly stopped his pistoning motion.
Miki tried to speak up quickly, thinking Gorou was angry.
The truth wasn't far off.
"Oh?!"
Miki was put into doggy style.
Gorou had to use a bit of his new strength to move her without pulling his penis out.
"She seems embarrassed by this position, but that's part of the punishment."
Boom! Boom!
Miki's buttocks swayed and rippled with each thrust of her husband's hips.
"T… too deep," Miki thought, literally crying from pleasure.
Her bare back was stretched out before Gorou, and her C-cup breasts jiggled with every thrust.
From Gorou's perspective, her white, round buttocks were hypnotic.
Finally, he couldn't hold back that primal instinct within him.
Clap! Clap!
Gorou Hyoudou had just spanked the mother of the Red Dragon Emperor of this era.
"Haaak! G-Gorou! Spank me again!"
This purely impulsive act seemed to awaken something in Miki, a side of her unknown to her husband.
Of course, Gorou played along.
"You like being spanked?"
"Yes! Yes! I love it! I love being spanked so much!"
Gorou raised his hand and slapped her buttocks again.
"Aang! T-thank you! Hmm… ~"
Her vagina quivered each time.
Gorou could feel he was about to ejaculate any second.
Even so, he kept up his hip thrusts and occasional spanks on her once-white, now slightly red buttocks.
Bam! Bam!
Grit your teeth.
Hold tight.
Gorou couldn't take it anymore; he grabbed his wife's buttocks with both hands and delivered a rapid series of thrusts.
"I… I'm going!!"
"Grhahm!! ~~"
Miki didn't respond this time, but she let out a strange sound before burying her face in the sheets.
For the first time since he'd penetrated Miki's vulva, Gorou pulled his penis out.
Sure, he made sure to properly unload the contents of his bullets into her uterus.
Gloop.
"If she's not pregnant this time, she will be tomorrow," he said, satisfied, looking at the abnormal amount of semen flowing from his clearly unconscious wife.