Stacy hesitated for a few seconds before deciding on a course of action. The sight of Amanda parading around with no shirt, visibly larger breasts and a physique like an amateur bodybuilder filled Stacy with conflicting emotions. If getting a powerful body like that was as easy as shooting yourself with this gun then she wanted one like it, if not bigger. She could imagine herself large and powerful and sexy like Amanda. She could imagine something going horribly wrong, she wasn't sure how this thing worked.

She looked at the dials again. The dials were numbered from -10 to +10 with 0 being in the middle. Currently height was set to +1 and muscle was set to +3. She looked at Amanda and noted she did apppear slightly taller, Amanda struck another double bicep pose and Stacy felt another pang of jealousy and lust. But uncertainty regarding the guns function kept her from wanting to try it on herself.

Stacy set the height dial to 0. Amanda said she wanted to be more muscular, not taller. Her fingers hesitated over the muscle dial. 3 seemed pretty big to Stacy already. How much bigger should she make her daugher? And how did it work? If she shot her again at the same setting would it even have an effect? Or would she have to increase the power to make her any bigger?

Stacy finally twisted the dial to 5. There was only one way to find out whether this was going to give Amanda a body what was +5 muscle or whether it would be +3 muscle body with an additional +5.

"C'mon mom, just one more shot."

"Alright, keep your pants on." Stacy aimed the gun and fired.