“Morning Brenda,” Mark said while turning around to see his sister, still groggy from just waking up.
Brenda was 15 years old, slightly younger than Mark who was 18. Brenda was 5'1" (155cm), a decent bit shorter than Mark who stood at 5’9” (175cm). She was shy, had few friends, preferred to read or play games, and spent a lot of time in her room.
"Mmh, hey, Morning Mark," Brenda replied, her weariness seeping through her words.
She was quite pretty in a cute way. Her body was slender, with small hips and moderate breasts (B cup). She was brilliant, one of the top students in her class. She took the hardest classes available and always managed to get perfect scores. She was always very humble about it, though. She never tried to flaunt this around her siblings, still preferring to stay in her room.
“Uhm, say, have you ever thought of being taller?” he asked.
Although it was rare, she did occasionally talk about wanting to be taller. She was pretty small and was curious how it felt to tower over people.
Still half asleep she replied “Yeah, I guess? I mean, it could be fun, I think. What brought about this question, hm?"
"Oh, nothing really, it's nothing, just a dumb question, forget that I asked." He said.
Well then. This was it, the moment of truth. She said it could be fun right, she wouldn't mind then, it was perfectly okay. Mark concentrated, thinking about a bigger Brenda. Would it work? Probably not but what if it did? He needed to make sure, it was not like it would hurt anyone. Mark used all his willpower to imagine Brenda growing...