Alice looks at you, eyes wide. You're still looking at her breasts, which must be about the size of soccer balls, being constrained by a giant black lace bra.
She grabs your arm and pulls you inside her room, closing the door behind the two of you. You hold the rock tightly, afraid she'll try to grab it from you.
"Okay, I'm interested," she says in a voice not much louder than a whisper. "What else can it do?"
"Anything, as far as I know," you reply. You take a peek into your closed hand and see that the stone isn't currently glowing. "Not right now, though -- it's recharging."
"Recharging?"
"Yeah, more accurately, it's working on creating the new reality of your, um, breasts being larger. Once it's finished, it puts you into the new reality at the moment you made the wish, so you perceive reality as having changed instantaneously. It's probably easier just to think of it as recharging. See, I wished to know everything about this stone."
"I guess so," says Alice. "And you just found it tonight? What else have you done?"
"Uh, right after I found it, I wished I was less tired -- then my car wouldn't start and I wished it would," you reply. "Just some other minor stuff." You can feel your now 10-inch cock in your pants, but you don't want to admit to that or to the sex toy wish that had obviously altered Alice.
"What about world peace or something like that?"
"I guess I could wish for that, but what if it made all humans disappear or something like that?"
"Good point," your sister admits, and then she asks, "How long does it take to recharge?"
"Depends on how widespread the reality changes were," you answer, and look at your hand again to see the stone is glowing once again. "Okay, it's done! I think things that mainly affect one person go pretty fast."
"So, um, would you be willing to make another wish for me? Nothing big like world peace."
"Sure, I guess."
"You know my boyfriend Steve?"
You don't -- in fact, you were thinking she was turned into a slut by your sex toy wish, but maybe the reality change had actually given her a boyfriend. But you just say, "Yeah, okay."
Alice tells you...