I turned off the movie and walked down the hall to my sister's room. "Tiffany?" I raised my voice, knocked on the door, and played dumb. "What's going on?"
There were a couple of seconds of silence, and then she yelled from inside, "Nothing! I'll be back out in a little bit!"
I wondered if I could change her without looking at her, so I thought about her shoulder-length blonde hair turning jet black and growing until it reached her ass. Within seconds, I heard what sounded like a combination of a loud gasp and a whimper.
"Now what's the matter?" I yelled through the door.
"Uh, you can go ahead and watch the rest of the movie without me!" came the reply.
At that point, I wondered if I could change her mentally as well as physically. I thought about her wanting to show me what was going on, and desperate for advice from her little brother --
"Okay, I'm opening the door," she said, slightly derailing my train of thought. "I look different. Don't be shocked."
The door opened slowly. My eyes first went to her tank top, which now looked to have a pair of honeydew melons stuffed into it, but then I saw her hair, which was just as I'd imagined. I was a little surprised at how good it looked -- my first impression was that it suited her better than her natural blonde, actually.
"I think you saw my boobs growing while we were watching the movie," she said. "And then just now, bam, my hair grew this long in about two seconds, and changed to this color."
"That's incredible," I said. "Have you been making any wishes lately?"
"Ha ha," she said. "I'm sure bigger boobs have crossed my mind once or twice, but not this big. Jeez, I look like a stripper."
At that, I had a quick thought of her stripping, which is probably why she grabbed the bottom of her tank top and pulled it up. "And I'm not sure yet about this hair," she continued, struggling to get the tank top off because of the very hair she was complaining about. I have to admit, I wasn't really listening to what she was saying, because I was staring directly at the oversized breasts hanging from her upper chest, with their perfectly round aureolas and nipples the size of the tip of my thumb.
She was still talking about something or other as she bent down to pull off her boxers. They fell to the floor revealing pink cotton panties, which she also pulled off. She stepped out of both items of clothing, then kicked them away. I think she was ranting about how no one would take her seriously with the giant boobs, but I was looking at the fairly thick carpet of blonde pubic hair between her legs. First of all, it should have been black -- a quick thought from me, and the color changed almost instantly. But then I went further and thought about it disappearing. It looked like the hair was receding into her skin, and now her genitals were on full display.
She must have noticed me staring, because she asked, "What are you looking at?" She had to lean back and tilt her head sideways to see what was going on, and when she realized, she went in and felt the area with the palm of her hand. "Whoa, I'd always wondered what this would feel like, but I never wanted to go through a waxing."
"So you have been making wishes!" I joked. Really, the whole situation was absurd -- my sister, with magically enlarged breasts and altered hair, was standing naked in front of me as if it were perfectly natural to do so.
"Fine," she said. She tilted her head back and said, to the ceiling, "Hey, whoever's listening, I wish for a brand-new wardrobe. I need it, 'cause of my boobs!"
I thought about her having a closet full of sexy clothes. But then I realized I wasn't changing her with that thought, so it might not work. I tested it by thinking about her having new clothes suddenly appear on her body, much as I hated to think about that.