Ruby wants a certain addition.

"Mmm, you know what? I said I was going all in, and I mean it," Ruby smiled. "What say we make that more literal?" As she spoke, she undid her skirt, and pulled it down a little along with her leggings and panties on order to expose her womanhood. She then sat back against a tree.

"Oh? Is this going where I think this is, Mistress?" Yang asked, eagerly looking towards Ruby's glistening snatch. "Please say yes..."

"It is indeed!" Ruby nodded, blushing a bit, glancing away. She had already decided to fully embrace the new magical aspect of her life, but this was a big step here... still, she realized just how much Yang was up for this, and was determined to meet her on her level. "I wish for you to turn my clitoris into the length of a cock... But don't give me the testicles, I still want my folds easily accessible... Actually, make the testicles internal. I need to get semen from somewhere after all, right? And as for said semen... The seed should be fully viable, but only capable of impregnating a girl if I want to... And..." She paused, considering whether she wanted to ability to turn her clitoris back and forth between normal and dick form. She decided against that for now, she could always wish for it later if she found the addition too awkward to have permanently. And the idea of navigating daily life with it was hot. "I want people to think it's actually normal for me to have a cock, so I don't have to worry about hiding... boners," she finished with a blush.

"Okay, Mistress, that's all well within my power!" Yang grinned, enthusiastically snapping her fingers. Instead of the change happening immediately, however, Yang's index finger glowed a violet hue. She was taking a few liberties with the wish to make the process more sensual and intimate. She had a natural intuitive sense for Ruby's desires, so could avoid crossing any lines Ruby didn't want her crossing. She knelt towards Ruby, and moved her finger towards Ruby's precious jewel, before pressing her fingertip against it.

Ruby gasped as her clitoris started to glow violet as well, and felt like it was burning intensely. It wasn't painful though, more of a sensual, pleasant heat. She parted her legs a little more, watching as her nub began to spasm rapidly, growing out slowly against Yang's finger, which she drew back minimally to accommodate the growth while maintaining contact. Ruby began to pant and gripped the grass, gritting her teeth as she struggled to handle the intense, unfamiliar, but absolutely delightful sensations. Within her pelvis, she felt flesh shifting, and two more sensations of that heat, no doubt the testicles forming.

Yang smiled as she gazed intently at the process, determined not to miss a moment of her sister and Mistress's body becoming more perverted and suitable for ownership over her. She began tracing the growing member with her finger as it lengthened, transferring more of the magic to help it along. It continued to slowly extend, the tip reshaping somewhat to form the glans, normal skin forming on the length leading up to that. The tip split open near the end, Ruby moaning and squirming at the absolutely unique sensations running through her. Once the cock was fully formed, completely erect, Ruby cried out and threw her head back, bonking it slightly against the tree, but failing to register that amid the throes of pleasure, her hips bucking and squirming as the mere sensation of her cock growing pushed her over the edge. Yang immediately wrapped her lips around the tip, just as Ruby's semen started to erupt out of her newly formed manhood... Or perhaps futahood was the more appropriate word.

Yang gulped the seed down greedily, as if it was pure ambrosia, and Ruby wheezed, her skin glistening with sweat. "Oh... Wow... That was so... Intense," Ruby wheezed as Yang pulled off, grinning mischievously.

"That was the point, Mistress~!" she chuckled, wrapping her fingers gently around the new appendage, which remained fully hard despite the recent ejaculation, kept invigorated by the sheer sensuality of the situation, and stroking slowly, getting Ruby to moan in delight.