John immediately felt a surge of magic and the stone grow red hot. He crumpled off his bed, holding his stomach in pain as Zoe jumped off the bed with the stone. "Oh my god Jon, did I do something, I'll go get help!" as she darted out of the room. It was no normal stomach ache.
It was his new womb growing in, the in this reality birthed Zoe. The changes would not stop there as his face began to reshape becoming softer, rounder, with cute little nose, big sentimental eyes, and plump lips. Further down his testes had receded into him, becoming his new ovaries, as his penis shrank more and more until it tucked itself into two plump labia as his new clitoris. Biologically to the world, now a woman. He was hardly done though as his pelvis bent underneath him and widened, giving him a new female bone structure as he shrunk down til he was a paltry 5'2.
His shoulders shrank, his hands became dainty, nails grew and coated themselves in a mature scarlet red. All muscle tone on him vanished, leaving his arms even a little jiggly. His nipples and areola exploded in size, being perfect for a baby to suckle on. His breasts were growing all the while and the reached the point where he couldn't see past his 32F cups. His stomach swelled with fat, giving him a muffin top that a woman who never lost the baby weight and grew older would have, lining itself with stretchmarks.
His thighs were plump and jiggly, touching together for that dreaded chub rub women always loathed. His hips and ass, wow, they were piling on with fat, growing wider and wider and could only be described as childbearing. His but spotted itself with cellulite and become so round and jiggly it would always bounce and bound with his swaying hips, drawing anyone's attention who saw it from behind. A total mom butt.
Jon looked at his naked reflection in horror. He looked like a plump soccer mom. But it didn't stop there. Soon he felt a jingle on his ears as two hoop earrings appeared, a pearl necklace, and a charm bracelet around his wrist. Clothes too, as the biggest bra he'd ever seen strapped itself to his chest and pink waist control panties cupped his vulva. The process only completing itself when a flowery sundress slipped itself on.
Zoe ran back in, "Jon I can't find anyone! .... Wait, who the fuck are you?!"
"Zoe wait, it's me Jon... Oh my god, is that my voice?" as he heard his high pitched, sing-songy voice for the first time.
But it was already too late, Jon heard the door to Zoe's room slam and the lock turn. With the stone. There would be a lot of explaining to do.
"Fuck"