She fiddled with the dials quickly, and aimed at herself as Ralph tackled her to the mat - he knocked her over effortlessly, but the trigger was pushed, and a wave of energy washed
over her from the gun as Ralph topped her... it took a few seconds for her to recover, and she felt Ralph begin tearing away at her already somewhat shreaded Lycra top and madly kissing at her neck, felt panic as his hardness pushed into the soft material of her tights, knowing she was too weak to resist him as his hands found her waistband and pulled them down, he fumbled desperately trying to penetrate her for a few moments, and she was powerless to resist him.

...and then it happened.

She first felt it as an infusion of energy as her torn muscle fibers were replaced with fresh ones, the stiffness of her limbs and fatigue washed away in an instant - then the change grew more dramatic as her body expanded - muscles, already defined and shapely, simply grew - glutes, thighs and pecs pushing against Ralph's own exposed body, her height increasing till she matched his own stupendous height - her thighs ripped the already abused tights to pieces, and she felt a wave of delight flow into her neitherregions as the beauty portion of the gun tweaked her sex - or perhaps it was just the orgasmic rush of power as she grew into a nearly 8 foot tall muscular amazon - her top, already nearly torn to bits, finally gave way as pectorals pushed expanding breasts and hardened enlarged nipples into Ralph's chest - and then dragged up his torso and to either side of his head as she grew to her full height - and the fear she'd felt just moments ago was replaced by intense pleasure and a burning heat deep inside of her.

As the final barrier to his target was shreded, Ralph pulled her immaculate legs apart and positioned himself, trying to push inside Jess as she clenched her internal muscles, feeling the pleasure at his frustration as he thrust himself at her, unable to quite enter her and growing pain and confusion as he began to bruise himself against her... and Jess smiled, in control and feeling hornier then she'd ever felt in her life...