Same as Sharon, Tanya selected the weight gain option, at first at a low setting.
Meanwhile Sharon couldn't be seen in the booth as the bright orange light blocked their vision.
Inside, she began to feel her whole body reacting to the wanted changes. After just a few seconds, she felt softer, and she was. Her belly stood out a bit, making her look a little overweight.
Just as Tanya wanted to increase the intensity, Jim actively tried to pull her away from the controls, but failed at it. She was just too heavy overall.
Tanya on the other hand was getting annoyed by Jim's miserable attempts. She turned around and performed yet another belly-tackle to send Jim aback.
She turned back towards the controls and started bumping up the intensity rapidly, hoping for Sharon to far exceed her own weight.
Unbeknownst to her, her overflowing ass managed to push a button as she was getting Jim off of herself. So soon Tanya would be in for a big surprise!
The bright light of the booth changed from a fattening orange to a strengthening red.
Fortiunately for Sharon, her newly acquired access fat quickly receeded to make room for another form of mass, a much harder one.
This time the reaction in her body felt much more pleasant as she steadily piled on more and more mass. Tanya only amplified the speed of her growth by her neverending increase of the intensity dial.
After a couple moments, Sharon already felt small ridges starting to appear on her abdomen while her shoulders widened.
After a full minute of growth, Tanya thought it was enough due to the intensity.
As the door of the booth opened, the light slowly faded away, starting to reveal Sharon's new body.
Sharon took her first step out of the booth, presenting a sight to behold. Her thighs were bigger than any Tanya ever saw. They rested on top of her comparably thin knees, leading to yet another extreme. Her calves were the size of soccer balls with her skin covering it tight.
Then Sharon fully stepped out of the booth to reveal the rest of her body.
A tiny waist with 8 tightly packed, rock-hard abs immediately greeted her followed by several inches thick pecs on which rested no boobs to speak of.
Sharon's arms however were the complete opposite of nonexistent. Attached to wide shoulders, she sported arms containing biceps the size of cantaloupes and triceps not much smaller than that.
Sharon's height did not change like the rest of her, making her muscles look even larger on her small frame.
"Oh shit..." Tanya exclaimed. She rushed back to the controls to see what was up, but was stopped by Sharon just as she got there.
"So you wanted to make me what? Fat? Like you?"
"N-No, of course not. I thought you could use some muscles to feel better about yourself." Tanya lied.
"No need for you to lie to me, Tanya, I know what your original intentions were. Don't even dare thinking that I haven't noticed my belly getting larger at first." Sharon replied, sounding kind of angry.
"Please, forgive me. I just wanted you to experience the same changes like I did."
"You know what? I would have forgiven you if it wasn't for that lie. But trust me, I just happen to know how you'll pay for that!"
Sharon grabbed Tanya by her floppy arms and lifted her up quite easily. Tanya figured she had to be even stronger than she looked!
Then Sharon threw Tanya back into the booth and manually closed the door behind her, then made her way back to the controls.
As she fiddled around with them, Jim didn't even DARE try to hold her back, knowing he couldn't stop that massive mountain of muscle anyway.
After double-checking the selected changes as well as the dial for intensity, Sharon activated the booth and Tanya slowly felt herself changing.
Tue Oct 12 22:14:17 2021