With Jess the giantess only a few super-sized steps away, Robert and Amanda didn't have time to inspect their arsenal of size-changing guns. If they'd had some time to think it over, they probably could've located the gun they so desperately sought. Jake, the boy from the other world, had told them that one of the guns could grant its target all the phenomenal powers of Superman--exactly the kind of firepower the two muscle teens would need to battle the rampaging titan currently on approach. Neither Amanda nor Robert remembered what this gun looked like; the only way they'd stand any chance would be to fire on one another with each gun in succession, hoping one of them would transform into a superhuman.

The first such trial found Amanda pointing a green energy gun with a prominent scope at her brother, while he leveled a red and blue patterned energy gun at her in turn. They both fired on the count of three. Robert was the first to react. He dropped his gun and clutched his face with both hands, rubbing frantically at his eyes.

"Are you OK?" Amanda asked. So far, she felt no different herself.

"My eyes!" he screamed. When he withdrew his hands and opened his eyes, a new world greeted him. His vision had been honed to superhuman clarity--colors and textures popped with vibrant detail. He could discern every tiny movement around him. Even the shifting currents of the air seemed to move like a garish pageant across his field of view.

"I can see... better..." he mused, overcome with the rush of new stimuli.

"Great," Amanda sighed. "You're not Superman, and I'm not Supergirl. I don't even think the gun you used did anything to me."

Robert looked at Amanda. His new senses revealed some information Amanda herself had yet to discover:

"Your muscles," he said. "They're twitching."

"What?" Amanda looked down at herself but noticed no change in her swollen physique.

"They're moving. Buzzing?" Robert insisted. As Robert watched, suddenly Amanda seemed to light up with an iridescent glow, a blast of light energy surging from her core to create a shimmering aura around her.

"You're glowing!" Robert cried. Amanda could not see the glow herself, but Robert's eyes picked up every flicker across the spectrum.

Now Amanda had started to shiver. "I feel..." she stammered. "I feel..." Amanda couldn't describe the sensation that now flooded her body--it was simply so powerful that it blocked her thoughts entirely. It began as a gentle humming in her chest, a crescendo building to an ever stronger pitch. Her ribs shook; her pectorals twitched and her newly-bazoomed chest bounced. Her heartbeat raced. Every inch of her skin felt flushed. She closed her eyes to weather the rush of energy that swept out from her core to the tips of her fingers and toes, tracing each peak and valley of her cut figure as it went.

"I feel..." she said again, still at a loss for words. Only Robert perceived the gradual reshaping of Amanda's body. Only his keen eyesight noticed the new vigor flooding Amanada's mighty frame; only his senses could pick up the subtle changes improving the sex appeal of her beautiful face, gorgeous locks, tremendous bosom, impossible curves. As the seconds passed, Robert watched his sister, the seven-foot Amazon bombshell, become his sister, the superhuman sex goddess.

Amanda cried out with joy as a geyser of energy, like an orgasm but millions of times more acute, more focused and refined, shot through her transforming body. Robert saw the glow that still surrounded Amanda swirl around each of her muscle groups, tightening sinew, expanding muscle fibers, reshaping flesh he thought perfect to yet greater levels of definition and mass. Though Amanda didn't get much bigger, it was obvious to Robert's enhanced sight that she was quickly getting stronger--much stronger.

"I..." Amanda's newly-enlarged breasts, now closer to the size of water cooler jugs than melons, rose to attention as though supported by a steel-girded bra. Even to Robert's discerning eyes they showed no signs of sagging.

"FEEL..." Amanda's gigantic biceps inched ever upward, adding new size and definition with each passing second.

With a final scream of joy, Amanda leapt into the air... and stayed hovering two feet from the ground, under her own power.

"SUPER!" she exulted, flinging her arms out into a double-bicep flex. Robert saw an incredible crackle of energy explode from each of the rising peaks, a shower of sparks erupting from Amanda's super-powered body.

"This is incredible!" she sang, as she zoomed around Robert's head. Flying was so easy. EVERYTHING was so easy. The world seemed to be moving in slow motion, like a carousel made of feathers and pillows. Everything she could see for miles--and now she could see for miles, thanks to her quickly-adjusting X-Ray vision--was flimsy, destructible, fragile. SHE was indestructible, unstoppable, perfect. SHE was invulnerable. SHE was strong. The world was just a collection of breakable toys.

"I'm the most powerful girl in the UNIVERSE!" Her whim demanded a costume to suit her new capabilities, and somehow, one materialized. Red and blue spandex flattered every inch of her better-than-perfect curves. A cape billowed from her shoulders; boots, gloves, and a domino mask completed her ensemble. "Isn't it PERFECT? I'm a SUPERHERO!"

But a growl from Jess interrupted her celebrations. She turned in mid-air to face her foe. Her inferior, overgrown, pathetic human foe.

"Time to save the day."

Little did she know that the gun was set incorrectly...