After finishing his homework in record time, Robert's mind wanders to his first training session with Cassie again. He had always dismissed working out and the physical body as unimportant, even banal, but he's actually finding it to be a pleasant memory.
He starts off by thinking about Cassie herself. Robert had never been all that sexually-minded - after all, sex is just part of the physical body, and Robert only cared about his mind. But somehow, Cassie had awakened something within him. His mind is filled for a moment with Cassie's body, and when his moment of distraction ends, he finds himself erect - the first time he had ever experienced a true erection in response to another person. Oh, he'd had morning wood a few times, and those random erections that happen for no reason, but this is different. Whereas those other times were like his body just going through the motions, this is motivated, insistent.
This then leads to thoughts of the workout itself. Robert finds himself going back over all of the exercises he had done. He' pathetically ill-informed about it all, so, being the nerd he is, he immediately seeks to educate himself on them. What he was figuring would be a 10 minute skim of the exercises rapidly becomes a 4 hour binge session of Youtube videos, articles, and even a 13 minute tutorial video of some guy called Johnnie Jackson posing, which he watches twice, even trying to imitate the body positions on the second run-through.
Throughout all of this, his erection wasn't fading - not even slightly. If anything, it was getting him even more aroused. But he hadn't any experience with dealing with an erection, so he continued to ignore it as best he could.
His mind still stuck on the posing, Robert heads into the bathroom to pose in front of a mirror. As he does so, he notices all of the little changes in his body. His shoulders are wider by a good 10%, maybe more, with a slight roundness that wasn't there before. His posture, once quite poor with a noticeable hunch, has become exemplary, giving the illusion of increased height. His once-flat, featureless gut has just the slightest hint of a ripple, suggesting some muscle underneath. His chest, similarly flat before, has actual shape, creating a slight delineation between his chest and gut. And there is the slightest powdering of hair growing from his crotch to his chest.
Looking down at his crotch, Robert's attention is brought back to his raging hardon. Dropping his underwear, he grabs hold of the shaft, which rewards him with a jolt of pleasure, a new sensation for him that almost dropped him to his knees. His gasp is loud enough to draw his mother's attention, and even as he begins to move his hands to continue the sensation, she knocks on the bathroom door.
"Are you alright in there?" she asks.
"I... I'm fine, mum," he replies unsteadily, in part due to the discomfort of his mother being there, and in part from the pleasure his ministrations are producing.
He hears her footsteps receding, and breathes a sigh of relief, which becomes another, this time stifled, gasp. Even as the new flash of pleasure rebounds through his mind, he feels some pressure on his hands, and realises that his penis is surging outwards in all directions - his 6 cm tool is now 10 cm long, and significantly thicker as well.
The sensation feeds upon itself, and with the help of a sudden, unbidden, image of Victoria, drives him quickly over the edge - he climaxes, his semen jettisoning itself from his dick and splattering against the mirror even as his legs buckle and he drops to the ground. The ejaculation empties him in just one spurt, but his body continues to try to pump out his seed, his body writhing even as he pumps the throbbing tool.
It's a full three minutes before the climax ends, and Robert struggles to his feet, wipes his cum from the mirror, and staggers back to his bedroom, where he collapses on his bed and falls asleep naked for the first time since he was a baby.
------
Victoria's night is similarly alien to her. After completing her homework, she finds herself unusually full of energy. The night is still early, and thinking on the workout Steve put her through, she switches back into her workout clothes. As she approaches the front door, her father interrupts her, asking where she's going.
"Oh, I just wanted to take a walk to clear my head," Victoria replies, a half-truth that she hopes would satisfy her father, as she suspects he would be skeptical of her exercising, let alone doing so on an evening. She rarely even went for walks.
"Is your homework done?" he asks pointedly. She nods, and he says "OK, be home no later than 9!", thinking it a joke as he expects she'll be back within half an hour at the most, more than two hours before the stated curfew.
As Victoria steps out of the house, she feels a rush of energy, and immediately breaks into a jog. As she reaches the road, she realises that she had already run further than she had ever run, before her training session with Steve, without getting out of breath. And the energy isn't fading. She finds herself running towards the local park, which is frequented by a cadre of fitness freaks - in the past, she would have avoided the park, as she felt incredibly judged by those slender, almost amazonian women and the few buff guys that trained with them. But tonight, she's feeling driven.
Without so much as an invitation, she begins training alongside them, managing to match the newest and least fit of them. What she first thought were disapproving glances she quickly realises are actually glances of fascination, as she's showing a level of fitness that is well beyond their expectations. The pleasure of this realisation makes her feel bolder, and she finds herself flirting with the youngest of the guys in the group.
His praise of her performance in the workout only further emboldens her. This, in combination with flashes of Steve's body through her mind, causes her to flush with arousal, and when she realises that she's on the cusp of kissing the guy, she suddenly pulls herself back. Thoughts of Robert flood her mind for a moment, and she immediately says goodbye to the fitness crew, with an extra wink for the young beau.
It's only as she jogs back home that she realises that she didn't even ask his name. But then, she didn't really need it - her true interest was Robert, she was quickly realising, with his winning smile.
As she approaches the house, she sees her father looking expectantly out of the window, a look of relief clear on his face when he spots her. On entering, he immediately asks her if she's OK. She glances at the clock, and sees that it's 8:30 - before curfew, but she'd been out much longer than any previous night, and she's sweaty and puffing slightly. After reassuring her father, she heads for her bedroom.
There, she spends a little time on the computer, learning more about fitness. But her extended park training session, following on from her gym session with Steve, meant she was exhausted, and she climbs into bed, not even bothering to take off her workout clothes or wash off the sweat. Her dreams are filled with Robert and Steve, both naked and engaging in various acts with her - her first ever sexual dream.