Amy was on the way to her house after leaving Tanya's, she was wondering what she could do now that she had the Chroni-app. She decided that she wanted to have fun with her sister without her parents bothering her, so she changed her life with the app so that she lived alone with her sister while her parents constantly traveled around the world.
When she got home Amy found her sister Sarah playing her favorite dance game.
"I see you're having fun." Amy said
"You can believe so. Do you want to play with me?" Sarah said
"I'm not interested, I'll just be here watching you play." Amy said. She had an idea that would seem cruel to her sister, but she thought it would only make it more fun.
Sarah was only two years older than Amy and had no boyfriend. She was beautiful and had several men who were interested in her but she had a phallophobia, thanks to this phobia she was terrified of male genitals.
Even though she knew that, Amy used the Chroni-app to make a 9 inch cock grow between her legs, all with her being aware of the transformation.
Sarah didn't realize what had happened to her, just feeling a tightening in her yoga pants and not noticing the bulge created by her new hard cock until the song she was dancing was over. As soon as she stopped dancing she decided to check and looked down, she could clearly see her new member who, hard as it was, pushed her pants forward.
"This can not be happening. This is impossible, I can only be having a nightmare." Sarah said completely terrified
"What's the matter Sarah?" Amy asked pretending to be worried
"What happened? A co ... co ... a hideous thing grew between my legs. How could this have happened? I have to get back to normal." Sarah said desperately, showing Amy the bulge that her hard cock formed in her yoga pants.
"This is incredible, you have a dick now." Amy said, being impressed
"Don't talk like this is a good thing. You know I don't get a boyfriend because of the dread I have of this disgusting thing, having one of these between my legs is even worse." Sarah said
"Look on the bright side, this could be your chance to beat your phobia. Take a chance, it's not as bad as you think." Amy said
"I don't know if I can do this. I can't even look at this, I can't think about touching it." Sarah said
"No problem, I'll help you with that." Amy said and lowered her sister's yoga pants, releasing the stick that stood proudly in front of her face.
Amy started sucking her sister's dick, which immediately stopped her saying "What do you think you're doing?"
"I will make you come. Perhaps you will return to normal after you have come." Amy said, hiding the fact that Sarah's transformation was not yet over and would only continue after she came.
"Okay, do that. But please, be quick with it." Sarah said and covered her face to see nothing, all she could do was feel it while her sister gave her a blowjob and played with her balls. It didn't take long for her to feel a totally new sensation for her when she came. Amy purposely let Sarah's cum hit her face and drip.
When Sarah finished coming she felt the same sensation as when her dick grew and looked hopeful to see her member disappear and give way to her vagina, but instead her dick split in two, one on top of the other, and her balls doubled in size.
"This can't be happening to me, it's just getting worse. Now I have two nasty things between my legs." Sarah said
"It even seems like you're thinking this is bad after how much you've came." Amy said
Sarah blushed and said "it's not that I didn't like it, it's disgusting and I don't want to know about it attached to my body."
"Now I’m not sure if you’re going to go back to normal either. All I can do is help you learn to like them." Amy said, turned her back on Sarah and took off her skirt and panties. She doubled over holding her balls so her sister wouldn't see them from behind. "Come on, put your tools inside me." she said
Sarah was reluctant, but Amy insisted so much she agreed to fuck her sister. She came up behind Amy and pushed, with the bottom stick going into her little sister's pussy and the top one in her little sister's ass. She couldn't last long before she came again, depositing her seed in Amy's holes.
An orgasm with two dicks left Sarah gasping. She lay down on Amy, still with her sticks inside her little sister, to catch her breath.
Amy could only feel when the last part of her sister transformation has been activated with another orgasm, when Sarah's balls have doubled in size once again and her dicks have split again.
At this point Sarah had given herself up to lust and didn't seem to be enjoying having four dicks right now. She barely got her breath back and fucked Amy again.
Amy was also enjoying having two dicks in her pussy and two in her ass, so much so that she couldn't resist and took off all the rest of the clothes she was still wearing.
After a few minutes Sarah had the third and most intense of all her orgasms. She realized that Amy came too, but she was surprised when she saw the cum come out from under her.
Finally satisfied, Sarah sat on the couch with all four of her dicks finally going limp. Amy also sat on the other couch, letting her older sister finally see her 11-inch dick.