"I'm gonna head to the gym, boss!"
Okay, Steph is gonna take as much time of as she wants, thought Tom.
"Alright, Steph, see you tomorrow!" replied her supervisor.
"Eh, don't hold your breath." Steph got up and sashayed out of the office, the combined force of her swinging hips and enormous ass jostling tables as she left.
The campus gym building was a state-of-the-art complex a mere two-minute walk from the administration offices. At least, it was after Tom rearranged reality to make it so. Steph flashed her ID badge and walked in. Tom followed closely, her hand accidentally brushing her ass as he did. Tom recoiled as Steph whirled around. She looked through him as she looked for the culprit. Upon finding nobody to lambaste, she shrugged and walked over to the locker room.
The campus locker room was shockingly empty, but it hardly mattered. Watching Steph change out of her jeans and into a pair of basketball shorts was a borderline-religious experience. Her globular ass was straining the the nylon as it hugged her every curve. Its sheer size forced her pant legs to ride up, revealing an indecent expanse of buttocks. Her perfectly-smooth thighs had grown along with her ass, forcing her tree-trunk legs to rub together as she walked out into the gym again. Tom took a deep breath. He had no idea what he was doing, but losing control wouldn't be a good idea right now. Steph consulted a notebook that Tom had completely missed prior to now.
"So, let's see here. Today I'll be working on glutes, more glutes, chest and tris, and glutes," she muttered to herself. She laughed and snapped it shut. "So squats it is then!"
Steph strode over to the squat rack and loaded her weights. Tom did a double-take at the plates she had loaded. He hadn't done that many squats in his life, but that was definitely more weight than he had ever lifted. Steph didn't seem to care. She strode under the bar and hoisted it up. She grunted as she settled herself towards the ground. Her ass squished against the ground at the bottom of her trajectory, and Tom gaped in amazement.
As she stood back up, however, Tom noticed a problem. Her form was beginning to slip, and she was visibly quaking. She froze in place as she struggled against the weight. Tom knew this wasn't good. Something in Steph's body was going to give out if he didn't step up.
"Steph is strong enough to lift that weight."
As soon as the words left Tom's mouth, Steph stopped shaking as she corrected her form. With a mighty push, Steph slowly forced herself upwards. Tom watched in amazement as a woman a full head shorter than him lifted more weight than he had in his life.
Unfortunately for Steph, her pants were not as strong as their owner. With a loud ripping noise, her basketball shorts tore as she stood up. Tom could see why. Her butt, which had already been freakishly large before, had grown thicker and perkier. Steph racked the barbell and stepped back, her new endowments bumping into a weight machine behind her in the two steps that it took. She turned around, ready to apologize, but found nobody there.
"Okay, Steph, focus. Your form's off, you aren't watching where you're going, and you brought the wrong pants today." She stretched her hands behind her and fondled her ass. Tom noticed that her underwear was now overwhelmed by their wearer. Steph's must have noticed it too as her hands made contact with bare skin. "And the wrong panties." She sighed, and Tom repressed the urge to laugh pityingly.
Instead, he decided he would...