I remained unmoving on the ground, as the door opened, my heart skipping a few beats. If Dad came in to see me like this... or Mom came in to punish me more...
Luckily my heart relaxed on me, and I almost cried with relief, as my sister Dawn came in. She was a short, pimple faced girl, cute freckles dotting her cheeks. She had pale skin and B Cup breasts, her short brown hair reaching down to just above her shoulders.
However, she was shocked to see me in my new form. "Hey, what are you doing in my brother's room?!" She said, a look of fury on her face.
I held up my hands however, getting up despite my new, extremely heavy sense of gravity. "Hold up, Dawn, it's me, Edwin!" I said, although with my new voice and body, I couldn't blame her.
"Liar." Dawn said in that scary low voice of hers. "You'd [I]better not have messed with anything in here, or I'll make sure you stay in jail for a long time...."
I gulped, this wasn't going too well. "Come on, Dawn, it's me! I used this Chronivac to turn myself into a girl!"
Her interest piqued at that, realization creeping into her face. "Chronivac? You mean the number one, highly advanced transformation software? But why would you give yourself the body of a pornstar?"
"The Chronivac told me this would be my gender bent self, so I wanted to try it." I said, glad she had realized the truth.
"Wow..." She said, touching my huge breasts with her pinky, giggling. "Your breasts are a real knock out, I'll give you that!"
"No, wait!" I cried out, but it was too late. My breasts expanded yet again, expanding to a solid G Cup now, ripping right through my shirt, now fully exposed. I poked at them tentatively, shivering at the pleasure it gave me, my vagina getting wet.
"Whoa, what happened?!" Dawn said. "Your breasts just ballooned!"
"You didn't let me finish explaining..." I said. "Mom caught me transforming, took the Chronivac, and made it so that every time someone would compliment my breasts, they'd expand."
Dawn had a look of fury on her face. My mom was never her biological mom, she was the child of some fling Dad had when he was drunk. Dawn's real mother left as soon as she was born, though, so Dad took her in. She always had some sort of resentment towards Mom, though, especially when Dawn came out as being bisexual.
"That bitch!" She said, helping me up. "That's it, as soon as I get you a stretchy shirt, we're gonna get that Chronivac back!"