I wonder what this transformation is about?

Kyoko was weakened, but Makoto was assured that no matter what happened, no one would be seriously hurt. With his promise fulfilled, his focus shifted to the ritual itself. "Sonia." She leaps from her dogeza to wrap Makoto in a liplock. When they break, she speaks.

"It's been every girl's dream since Novoselic's founding to lose her virginity to Xessex, and now I'm living that! Thank you so much!" She lunges, wrapping her arms and legs around Makoto's neck and stomach. Her I-cups push into his chest without her even trying.

"I'm not Xessex yet, Sonia." He deflected even as he lined up to claim the princess and release Xessex fully. As he finished, he thrusts, breaking her hymen and spilling royal virgin blood on the ritual circle. It glows a more rosy color, casting a brighter light. Without moving an inch, Makoto starts to transform. He grew from a modest height of 5'9 to a staggering 8'6. With height came weight, and nearly all of it in muscle. Arguably the most important of the changes, his cock began to grow inside Sonia, what was once a slight, but respectable tummy bulge became very noticeable very quickly. The bulge even reached to her breasts, titfucking him from inside her body. Instead of pain, however, Sonia felt pure pleasure at being stretched by this monster cock.

"YES! BREAK ME, LORD XESSEX! PUT MY DREAMS TO SHAME!" 'You were pretty good with that first girl kid, let's see what you can do with my power. Now, breed that slut!'

"I'm still Makoto, Sonia, just a bit bigger." The new Makoto grabbed Sonia as gently as he could, informed of his new strength. Picking her up off his cock, the idea entered his head to press her face into the head. Surprisingly, this didn't cause Sonia brain damage or the like, with her taking the dick into her throat with an ahegao. This was due to the new rules Kyoko had written after hearing of the possible physical component of the ritual.

New rule: Women's holes can stretch to elastic proportions safely and painlessly during sex, an oversized cock would only make pleasure spread throughout the body.

New rule: Women don't feel pain during sex, any pain they would experience is converted to pleasure.

Apparently, Kyoko was a very good actress.

The dick bulge reappeared through her stomach after Sonia finished **** it down, almost touching her pussy. He continued to plunge, throatfucking the princess like a human onahole. As his climax approached, the silhouette bulged further, and then he came.

"GURGURGLEGLRRFFWFHFGHHURHUH" Sonia was pretty out of it, as the orgasm overran her stomach she was almost vomiting cum. Clearly Makoto's new size translated to virility. Even after Sonia collected herself, she still looked like an overdue octomom. "My lord, thank you..."

"We aren't done, you still haven't cum." 'Oh, yes she has--twice. You did such a number without my power that every girl here'd probably cum to a poke, and now you have my unrestrained power at your side.'

'I still haven't cum in her. Even with her hymen broken, she's still a virgin.'

'That's the spirit! Go get 'em!' Makoto picks Sonia up again as she spreads her legs, ready to be taken again. Makoto rams his now 2 and-a-half foot beast into Sonia's cunt. She cums again and again, the slightest movement of the thick cock in her tight pussy setting her off, every thrust brings a new explosion of sexual passion and a new puddle of arousal. Finally, Makoto cums, seeming not content with creampieing her pussy, his orgasm persists even as thick semen floods out of her. Her entire lower body is covered in off-white spunk. No longer able to feel her legs, she lounged in a pool of their mixed juices, more than ready for her lord to use her again.