(Wanted to try writing a more detailed transformation scene, not sure how well it turned out, but hopefully it was at least interesting.)
"I'm so so sorry, Mrs. McMillan. I wasn't looking where I was going and.." Jon began to finally respond, before trailing off, taken aback at the sound of his own voice. It had come out quite a bit higher than he normally sounded. Maybe it was just cracking from the stress of the situation? He shook it off and continued, "I was just in a hurry to get something from the supply closet;" however, his voice didn't return to normal, if anything getting higher as he spoke. He absently rubbed his neck which was tingling in a strange way.
Susan scoffed, "I don't care about your excuses; I could have been seriously hurt! Do you know who I am? I could have you fired for this." The threat would have come off more intimidating if Jon wasn't distracted by how it sounded; Susan's voice started off high and melodic but dropped and octave and became a bit scratchy as she spoke. Indeed, the blonde beauty coughed and tried to clear her throat, seemingly confused as well.
'Why are voices changing' Jon thought in confusion, before catching sight of Susan's equally confused eyes. The pools of cerulean he'd been drowning in earlier had turned into smaller dull brown, and for some reason, familiar eyes. In that moment his fears of being fired, or worse, somehow getting his mom fired, were pushed from his mind as he realized something very strange was going on.
All at once the tingling sensation in his throat began to migrate down until it settled in his stomach, which began to pulsate; it was like their was a vacuum on the inside, pulling everything in and making him clutch at his midsection. Jon wasn't fat per say, but he was what his PE teacher described as 'doughy', but now his belly was pulling in smooth and thin, before a bit of solid muscle developed within his abs that had never been there before. Of course Jon couldn't see this at the moment due to it being under his shirt, but the sensation alone was bizarre.
While Jon was distracted, Susan was experiencing a similar change in the reverse, her taut midsection suddenly becoming loose as she felt like she suddenly gained ten pounds. Her designer sundress suddenly felt a little tighter at the waist than it had before, and below it the hard won abs she'd sculpted with her personal trainer dissolved into flab. The strange shifting of her body didn't slow down, instead speeding up as the sensation traveled lower. It felt like her ass was literally deflating, shrinking down and becoming flat below the now loose dress, while at the same time her hips shifted in and became narrower making her stumble as her legs realigned.
Jon felt like his ears were burning as they shrunk and holes appeared in the lobes, "What the fuck is happening?" he asked, stunning himself by sounding exactly like Mrs. McMillan.
"Why do you sound like me? Why do I sound like you!?" Susan asked in return, as indeed her voice now sounded like Jon's original. She watched with mounting horror and confusion as the dweebish brat seemed to get taller, his legs shifting, elongating, and developing a feminine shape. Smooth muscle developed first in his calves before rippling up through his thighs. "Are those-AHH!" Susan cut off her question with a yelp as her ears felt a momentary severe pinch. Both of her dangling gold and sapphire earrings had been forced out by her piercing closing, and fell to the ground between her and Jon.
Jon was all to aware of his latest change as it didn't stop at the legs, instead traveling up into his ass, which began to grow into a tight bubble. Susan McMillan had always prided herself on her perfectly rounded rear, and while she had lost it, it seemed Jon was gaining one. He had to hastily unbelt and unbutton his khaki shorts as his expanding butt and widening hips strained against them; they tumbled to his feet and he kicked them away, leaving him in his boxer shorts. Before he could react, two things happened at once, his face began to contort and his scalp exploded with growing hair. Nearly every feature rearranged itself, his jawline strengthened, his teeth turned straight and white, his cheekbones raised, his lips plumped, his eyebrows became more delicate, his nose shrunk, his lashes lengthened and more. Simultaneously his hair grew rapidly, acquiring a wave and bounce and turning to a familiar golden hue.
"Holy shit, that's my face," Susan breathed as she saw Jon's head turn into a clone of her own, complete with hair. Every detail was exactly as she was used to seeing in the mirror, apart from her not controlling this reflection. She had a sinking suspicion of what was happening, and before she could start to get a grip on it, her own changes progressed. Her arms lost their toned muscle definition and her hands seemed to pull in, her fingers all shortening slightly as her nails reformed from french tips to the ragged short ones of a habitual nail biter. All over her her skin began to change, losing its tan and gaining instead unsightly body hair that kept sprouting up. The shock of that was quickly over taken though by the pain in her feet as the straps of her heels grew tight and she was forced to unbuckle and kick the white and gold strappy heels away. Her feet had begun growing, shifting several sizes, while all evidence of the pedicure she'd had that weekend evaporated. The pedicure hadn't gone far though, reappearing on Jon's transforming feet, though she couldn't see it through the loafers he wore.
Jon couldn't focus enough to reply to her as he felt like his back was popping, elongating ever so slightly as his shoulder blades pulled in and became more narrow. Jon never had the broad shoulders of say a guy like Biff, but now they weren't masculine at all. Jon grabbed at the strands of golden hair cascading down to shoulders and held them up to his eyes in wonder, looking over to see it was an exact match for the shade and length of Susan's. Though only for a moment, since almost the instant he looked at it, it began to darken to brown and recede into her scalp. He watched with fascination as her incredible hair turned into a copy of his own cheap cut, and like putty her face resculpted itself into a copy of his. After a moment, he was looking at his own head atop Susan McMillan's partially transformed body, and he could only assume he had hers in return.
In bare feet rather than heels, Susan had only been two inches taller than Jon, 5'10 to his 5'8, but now that was quickly reversing. Jon had already gained her legs, but now her legs began to weaken and shift, turning into his. At the same time, Jon felt his arms strengthening, years of tennis playing transferring into them, before he saw his fingers grow longer and gain sharp looking long white tipped nails. As his arms reshaped, his whole body acquired the glow of a healthy tan and he felt thousands of little pinpricks as his body hair retreated, particularly from his chest.
Susan was beginning to grow hysterical, frantically whispering "no," as she felt her chest pulling in. The perky D-Cups that had helped her win beauty pageants, prom queen, and Richard's ring shrunk away to nothingness and her chest lost sensation. It flattened entirely into a masculine chest, complete with sprouting hairs; so distracted by the loss of her prized assets, she didn't even register the broadening of her shoulders that accompanied it.
Across from her, and leaning against some shelving to steady himself, the pinprick sensation Jon felt on his chest as his chest hair disappeared, turned into an intense almost electric feeling. Suddenly his chest was rapidly pushing outwards and growing more sensitive; it was both parts pleasurable and painful as his work polo quickly constricted his growing mammaries and the rough fabric irritated his nipples. Abandoning propriety at this point, he pulled the shirt over his head, before it got too tight, struggling momentarily with his longer hair, and then took a deep breath as his new natural melons finished taking shape, rising and falling with a little bounce as he did so.
The two transformees had a moment to breath and catch there breath before the last major shift hit them below the belt. Jon nearly fell to the ground, overwhelmed by the new sensations hitting him as the folds of his new organ formed. The slight bulge in his boxers vanished from sight as his previous sex organ retracted and her new vagina formed. He had become a she. The tingling continued up into her insides and on some level she was aware a womb, ovaries and more must be forming, while her mound finalized it's shape.
At the same time Jon was gaining a woman's genitalia, Susan had lost his. The woman had become a man complete with penis and testicles that were quite uncomfortable against the thong he'd been wearing. He took a few ragged breaths as quite a few other minor little shifts occurred to both of them and looked across to see his old body, standing nude apart from a pair of men's boxers.
Of course Susan, now with Jon's body, looked even odder. The beautiful dress Susan had worn so well an hour ago, now looked all wrong on his changed body, loose where it should be tight and tight where it should be loose. Without his breasts and fabulous butt, the top hung off and the lower part didn't sit right, while his new slightly wider shoulders and less trim waist pulled against the fabric in an ill fitting manner. His hourglass had turned into a boxy rectangle.
Jon on the other hand now had a smashing hourglass shape, even if she looked a little odd standing there in her old body's underwear, white socks and work shoes. From her toned legs, to her new glorious breasts, Jon had definitively become a beautiful woman.
In short, Jon had transformed entirely into Susan McMillan, while the reverse had occurred to her, leaving both of them staring at one another in the supply closet, wondering what the hell just happened, and what they were going to do.
