Ms. Heather picked up the blue vial and drank it all in one gulp. It tasted bitter and metallic, overall pretty gross. However, that was quickly overshadowed by the warm pleasure that Ms. Heather began to feel throughout her entire body. Her muscles began to expand. Her biceps, which were already toned, grew and expanded until it looked like the seams of her lab coat were about to burst. Her abs began to grow and harden, and soon you could see them clearly even through the fabric of her dress, the outline of a rock hard six pack, like cobblestone. Her thighs became as thick as a small tree trunk, with definition that showed through the black stockings she was wearing. Her calves grew as well, looking like hearts carved out of stone on the back of her legs. Her pectoral muscles grew into slabs and caused her boobs to strain tightly the lace bra that was now barely holding them in. Even her back and shoulders expanded and hardened, further straining her lab coat. She smiled, then giggled a bit. "Oh," she said, "I didn't know how fun this would be!" She gave a big flex of her back and arms, and her lab coat finally gave out, tearing at the seams. "Oops!" she said with a laugh, "Guess I'm not used to my new size!" She decided to tear it the rest of the way off, leaving her ripped arms entirely exposed in all their glory. She stood there in her beige dress and black stockings strained to the max, looking fine as ever but rocking a powerful new body. She then...