"Come up here, babe.", Robert said to his now much smaller girlfriend, lifting her up and bringing her to his face for a kiss - applying too much strength to it for Jess she started trying to push out of it.

"Hey, babe, don't fight it - you know you want it. I think I got something downstairs for you too."

"Robert no, that thing would split me open." The phrase used before, but never quite so literally as Jess now said it.

"Listen - I want it - so you'll give it to me, got it?", Robert shouted at her. "But how about another kiss first, hmmm?"

Amanda watched as Robert pulled Jess into another one sided kiss. Damn her brother was a jerk - somebody seriously needed to put him in his place. And then she remembered the gun - she could put him in his place right now. Or, she could have someone else do it. Time to see the guns growth effect on women.

Amanda blasted Jess, holding down the trigger like she had with Robert - and watched as Jess began to grow within Robert's arms. Her muscles were swelling larger, though not as rapidly as Robert's had - but her breasts were also growing and she was getting taller at a rate faster than Robert had.

Robert was so lost in his physical domination of his girflriend that he didn't notice her changes until he could no longer physically dominate her. He opened his eyes and saw that her face was now as big as his and looking him right in the eye.

"Robert it's not stopping.", she said with an excited tone in her voice.

"Shit, Jess, what's happening?"

"I don't know, but I want MORE.", Jess moaned out, parroting Robert's earlier response - her tits, already as big as her head, were creeping into Robert's line of view as she grew taller and they grew bigger. Her muscles were now growing bigger than Robert's but so toned and defined that they had passed his in strength some time ago.

"Please, stop."

"No, I want... NEED MORE!", Jess moaned out - she'd felt nothing so erotic as this growth - her clothing had long since shredded and was piled on the floor - and neither Amanda nor Robert could help but admire the incredible body she now possessed as she had bent forward and was pressing her shoulders against the ceiling.

"Jess, stop, this isn't normal.", Robert said, realizing he was suddenly in the opposite role here."

More..." More she gained. "More!" More she grew. "MORE!" Jess finally had the strength to stand upright, her body bursting through the roof - all that remained visible to Robert and Amanda was the length of her magnificent legs up to her hips - her pussy now at eye level with Robert and large enough to encompass his head if she wanted to. Scared, Amanda stopped.

"Awww.... no more.", came the sexy purr of Amanda from above the roof.