Melissa realized that she kind of liked seeing her roommate with a big dick between her legs, but she had to at least try to get her back to normal.
"Caroline, I know why you grew a dick. I pulled the trigger of this gun pointing at you. I received it earlier saying that I would turn people into whatever I wanted, but I thought it was just a prank and I didn't believe it would actually work." Melissa said, showing the tf gun.
"So this is your fault. But why did you do it? Why a dick between my legs?" Caroline said
"I don't know exactly how the chosen transformation works, but I think because you're watching porn maybe you wanted a dick and the TF Gun should only be able to affect your body, so the dick grew on you." Melissa said
Caroline blushed, but was forced to admit that what her roommate said was true. "So if you shoot me again with me thinking of myself normal again I can go back to normal, can't I?" she asked
"If I'm not wrong it should work. Worth trying." Melissa said
Caroline then braced herself, mentalized herself as normal and asked Melissa to shoot her again. Her roommate pointed the tf gun at her and pulled the trigger, she saw an almost invisible beam of blue light shoot out towards her and waited a few seconds for the change to occur. When the change took place it took the opposite direction of the one expected, for instead of her dick shrinking until it disappeared, it split and two. Her leggings also got tighter as a new pair of testicles took up her sack.
"That didn't work. I was thinking about myself back to normal and yet now I have two dicks." Caroline said
"Had you completely stopped thinking about your dick? Maybe it didn't work out because of that." Melissa said
"I could not. It's hard to forget such a change in yourself. I'll try one more time and you shoot me one more time." Caroline said
Melissa did as her roommate said, but without realizing that it was her thinking that determined the change, she thought with interest at the scene of her friend's genitals multiplying. Thanks to that the result was her cocks doubling in quantity again.
"Again? I swear I had completely forgotten about them, I was thinking about pizza." Caroline said. She now had four cocks and had to take off her leggings as with a ballsack containing 8 testicles she was now getting sore.
"Let me try one more time." Melissa said and shot one more time. Her thoughts had started to wander and with that two more cocks grew in her friend's breasts, replacing her nipples.
Caroline was startled by how weird she was becoming. She was also surprised because at no time had she thought about dicknipless. Before she knew it, Melissa had shot her again and this time her arms changed into dicks. She realized that it was not the thoughts of the person struck that defined the transformation, but those of the person who fired the TF Gun, which meant that Melissa was choosing, even if unintentionally, her changes. She tried to warn her roommate, but it was too late and she was hit again. Her tongue stiffened and stretched out of her mouth, growing longer and thicker as it changed shape and color until it completely became a hard horse's cock.
Melissa still hadn't realized how the transformations really worked and was about to shoot one more time, but Caroline hit her horse cock-tongue in her hands and made her drop the tf gun.
Caroline couldn't help but come at the touch, shooting a lot of cum all over her dicks. Thanks to that, with her cock-tongue going flaccid, she was able to speak and said "Stop Melissa. It is not my thoughts that define the transformation, but yours."
"Did I choose your transformations? I'm sorry, I thought you were enjoying it and I was getting the next change you would choose." Melissa said