Missed by many of the students who scrambled out of the way as Jon began to glow and metamorphose, Sarah underwent a similar transformation at the same time, but her was internal rather than external. The only visible sign of it was her eyes shining the same white that engulfed Jon. It didn't massively alter her personality, as that was out of line with Jon's initial wish. Rather it essentially matured her mind in away that it may have done naturally over the next several years. She suddenly was overwhelmed with perspective; being the queen of Lake Valley Academy now felt like putting a lot of effort into being the biggest fish in a very small pond. She still cared about her appearance and being the best, put much of her pettiness left her in that moment.
In a similar shift, she suddenly realized that dating men while being attracted to women wouldn't end well. Best case she never got to experience true love and worse case scenario she'd have a ruinous lavender marriage that ended in a costly divorce. If people couldn't accept her for who she was they could fuck off. She was Sarah Fucking McMillan and their opinions didn't matter; she was destined to go beyond this small town anyways. And perhaps she wouldn't be doing it alone.
Meanwhile, Jon's transformation was much more obvious. His spine arched and shrunk as he lost several inches of height. His bones made a grinding noise as they rearranged themselves, his hips jutted out and his shoulders began to narrow. At the same time his gut sucked in as his waist narrowed; in fact much of his slight chubbiness began to disappear beneath his tightening skin. Said skin also changed, his acne vanished and he suddenly acquired a pale alabaster tone. Jon doubled over as his groin erupted in sensation; he could feel his penis and testicles being sucked up into his body. Then he burned with a mixture of pain and pleasure as the lips of his labia formed and a new vagina assembled itself. Deeper inside, organs rearranged, with a womb growing in. He had become a she. She stumbled backwards as the changes continues, knocking her desk over. By this point many students had fled the classroom to find a teacher or just get away from her, but Sarah remained staring, spellbound. Her bottom flared to match her widened hips and suddenly she had much more padding. This was followed by a complementary change as breasts ballooned from her chest. Jon now had C-Cup breasts and no bra to support them, luckily they were quite perky. Sarah absently realized Jon now had an hourglass figure. A very attractive hourglass figure.
The magic ripped from her torso down her limbs, shrinking them slightly and making her feet and hands more delicate. She stood a little more steadily after that, but was still overwhelmed by the change in her height and center of gravity. Finally the magic focused on her head; her lips grew full, her cheeks grew rosy and she developed adorable dimples. Her eyes acquired naturally thick lashes while her eye brows simultaneously thinned and arched a bit. Her complexion became perfectly clear at the same time she gained a cute button nose and a stronger jawline. Finally, her hair exploded into waves of dark brown down her still tingling back. Her male clothing was now exceedingly ill fitting; her shirt was pulled taut over her breasts and her pants and underwear had fallen to the ground when her waist initially slimmed, leaving her naked from the waist down.
The magic dissipated and Sarah was left staring at a beautiful girl, standing half naked in a massively ruined classroom, with desks and papers littering the floor. A girl who had just been a boy she'd never given a single thought. A girl she knew was her soulmate.
Jon's new body, not correct clothing:
