Robert looked down at his sister, still a little bit confused. Amanda was picking herself up off the ground groggily, shocked by her brother's new strength. He began examining the gun closely, nearly oblivious to the changes that had happened to his new and improved body.

"Oh baby, you look incredible!" Jess said cooingly, who had walked up behind him. She began caressing his huge arms and 8 pack abs, astounded by their hardness.

"I can't believe how big you are, honey!" This is so amazing" Jess continued to seductively caress his chest and shoulders. Robert turned away from the gun for a second to lean over and kiss his now much smaller girlfriend.

Enjoying a deep, passionate kiss, he smiled. "Yes, wonder how big I am now?"
Jess looked up at him lecherously, her heart beating quickly. "I don't know baby, but you're huge and hard. Looks like that gun is what made you that way. How does it work?

Robert looked back at the gun, noticing the different settings of grow and shrink. As he studied it, Amanda remained on the floor, still afraid of her now much bigger and stronger younger brother. How could she have been so careless with the gun's settings? Instead of a smaller, weaker brother, she now faced a far bigger and stronger one, and he had the potential to make himself even bigger.

Robert stuck the gun in his waistband and quickly walked over and grabbed Amanda by both wrists with one arm, hoisting her up easily with his vast strength. Amanda winced in pain, as Robert sneered at her.
"So, you thought you could shrink me? Is that what you were doing?" he demanded.
Amanda didn't say anything, but let out a cry of pain as Robert increased thr pressure on her wrists. Eventually she relented, screaming "Yes, yes, I did. I wanted to make you smaller!"

Robert let go of her and she fell hard to the ground. He laughed and said, "Jess, maybe we shrink Amanda instead, what.."
Robert abruptly stopped talking. Jess had walked up behind him and quickly reached her right hand into his jeans and had started rubbing his enlarging dick. He became so enraptured with the moment that he failed to notice Jess pulling the gun out of his waistband until it was too late. Robert quickly spun around, but by then Jess had the gun pointed at him with an evil smile on her face.
"Maybe, honey. Maybe not. Maybe we should use it on myself first?" She smiled wickedly.