The potion began to work its magic, unknowingly to Rouge, as she began to felt her whole fat body trembling furiously. Her jade colored eyes widened in utter shock.
"What's happening?!" she shouted before she let out a massive belch and an even greater fart from her jiggling ass. After that, her whole body began to grow with fat. Her hips widened, as did her thighs, butt, and arms, her stomach grew and began to droop over her womanhood, her breasts now even bigger than before, zooming past the alphabet, and even her face began to feel the effects with puffier cheeks, plumper lips, double chins, and a widening neck.
Shadow just smiled as he watched the bat girl's weight quickly ascend, higher and higher as her body became thicker and doughier. He sat down, front row center, enjoying the view.
Rouge struggled to get up, but to no avail. She was easily in the four hundred pound range, slowly becoming immobile. As she was struggling, she began to feel light-headed. "Why do I feel so... funny?" she asked rhetorically, unknown to the fact that her IQ was also slowly falling, not in the same rate as her escalating weight, but still, damage was being done as her fat hands touched the soft, oozing fat of her enormous breasts, still the biggest part of her, as her girls began to slowing rip her dirty shirt.
Suddenly, as she was still gaining...