Jen left her house that next morning feeling great, her new muscles gave her a boost in her already big ego. She got to the gym and a sense of deja vu hit her, memories of the place filled her head and she entered ready to do her now regular workout.
"Hey Jen, good to see you!" Eric, the front desk clerk said to her. She smiled and answered back, they weren't familiar with each other according to her new reality. Jen scoped out the place, a few people were here, she saw a bunch of guys working with the weights at the far end, she decided to start with cardio first. The three guys were hanging out for a while afterwords, she sighed and waited, not wanting to deal with a bunch of douche bags. While she waited she observed them, and felt a little envious of them, they were slightly more muscular, she wanted to be that big, her mind made up she decided to go for it.
"I wonder what it's like to be that big." Jen said, unfortunately she didn't aim it at one guy, so all three were targeted, the curse could have taken it for their cocks, but it knew what she wanted, and oh boy would she get it. Jen felt the heat she felt the night before, and watched as her muscles swelled, they sized up nicely and the heat dissipated, Jen flexed her new muscle mass and chuckled.
"Not bad, not bad at all." Jen said, then another wave of heat hit her, "What the?" Jen's muscles expanded further, adding more meat upon her already beefy body, the wave stopped, and Jen groaned, "Now I'm too big." Her workout gear, yoga pants and a leotard, were now strained to their breaking point. "Well at least that's over." Jen said, and was hit with another wave of heat. "Shit, what did I do?" She groaned as her now beefy body expanded to even more extremes, her pants ripped apart and fell to the floor, her leotard tore at the back and stretched even further, the wave ended and the three guys walked off, leaving Jen with a mountain of muscle.
"Well at least I don't have to work out now." Jen said, and was hit with a final wave of heat, she looked up and saw that the wall of mirrors reflected one last man, a picture of a pro bodybuilder, Jen gulped as her body packed on one last and huge surge of muscle, her body shuddered trying to hold her up as it expanded to an extreme, the growth stopped and she stared at herself in the mirror.
Her new muscle dwarfed her old body, memories filled her head about her finding out she had a rare genetic condition where she would gain but never lose muscle. She remembered being defiant and trying to prove it didn't happen, and how she exploded with muscle over the course of a week, with every little workout she gained more and more, she was addicted though. But she seemed to have plateaued last year, leaving her a massive and freakish woman. But she didn't care, she just called herself "Amazon Jen."
People thought the name suited her and she ran with it. She made good money going to weightlifting competitions and no one could stop her, because she technically was cheating. Jen looked at herself and sighed, "I guess this is my life now." She walked out of the gym, her footsteps somewhat audible, and went home, somewhat regretting having gone to the gym.