Suddenly there was a loud moan from my sister (actually the deepest and most sexually charged moan I had ever heard).
Simultaneously, a dazzling, eye-blinding flash of poison-green energy engulfed my sister's body and an ear-deafening hissing was swelling up,
soon reaching a level, at which point we had to cover our eyes and ears in helpless agony.
And then there was silence... and darkness.
I opened my eyes and all I could see was my sister standing before me, her voluptuous body glowing in a pale light... her gigantic breasts,
her sexy hips, her knockout ass, her perfect legs... but most strikingly her godlike face, her hot, kissable lips, her narrowed eyes, which were still burning of poison-green energy, and her flowing curls of full, golden hair.
"Hello, little brother", my sister moaned, breathing every word on me like a deep kiss. Then she walked up at me, and it was only then that I
realized that she had grown taller than me. Before her head had only reached up to my nose, but now my head was just at the level of her immense breasts.
"Say hello to the Ladies!" I heard my sister's taunting voice from high above.
Then I could feel her hands at the back of my head as she shoved my face deep into the endless cleavage of her huge breasts, which felt invitingly soft, invincibly strong and ignitingly hot at the same time.
Until there was darkness again... and silence.
When I finally came to my senses again, I was back in my sister's room. Looking around, I found my girlfriend Susan, who was just waking from a similar state of bedazzling. I took her hand, then looked for my father, who was returning from some dreamlike vision, as well.
There was, however, no sign of my sister.
Her bed was empty, the cuffs and numerous ties were opened, and all the infusion-needles unplugged.
"Strange...", my girlfriend named all I could think of this moment.
My father, however, seemed to know more about what had happened, as his eyes were full of overjoyed satisfaction. So I asked him:
"Dad, what has just happened?"
"She made it!" he just answered, while examining the infusion-needles, which, paradoxically, were without any remains of my sister's blood. "And my super-formula worked even better on your sister than I ever would have expected..."
"But where on earth is she now?"
I looked at my girlfriend and saw pure horror written all over her face. Then I noticed my mother standing in mute disbelief at the room door. I decided to call emergency to help my Mom (and my Dad). Then I took Susan's hand and got her out of there.