Emily blinked twice in shock and then rinsed off the massive glob of toothpaste that she had squeezed onto her brush when Jeff barged in.
"Jeff, you nearly gave me a heart attack! Why'd you come charging in here? Are you so excited about your tits that you just HAVE to show them off?
Jeff was also in shock. Firstly, his sister didn't seem to think anything of his new acquisitions. Secondly, he could see his own reflection in the bathroom mirror behind her and it was a surreal sight. There he was, dressed only in his pajama pants, looking the same as he had always looked... except for the absurdly large breasts, still adorned with adhesive medical bandages. They hung from his chest with a natural weight and curve to them, not like those bolt-on implants you would often see on porn stars. On a woman, this would be an impressively natural looking boob job. Somehow it managed to look almost natural on Jeff's teenage male body.
"Hello? Jeff? If you wanted to stare at them in the mirror you could have at least waited until I was done." Jeff noticed that Emily looked like she was trying not to stare at his chest, but her eyes kept flicking down and there was a hint of frustration on her face. Was she jealous? Emily had always been a bit under endowed in the chest department.
"Oh uh, n-no. I just seriously need to pee!" Jeff stammered.
"Oh! Right." Emily nodded and squeezed past him back into the upstairs hallway.
As she left, Jeff caught her looking back at him and then down to her own A-cup chest.
So this is how the stone "fills in the blanks"? Jeff couldn't help but wonder what kind of story the stone had created in order to make this all seem normal to everyone else.