A thicker base

Sam entered the mall more excitedly than he ever had before. His eyes scanned the crowd for a new person to experiment with. That was when he saw her.

Her pink outfit stood out, drawing Sam's eyes to follow. She was already a decently thick woman, something Sam was eager to test on. Raising the phone he smirked before snapping a picture.

Sam was once again surprised as this woman's entire body began to expand. Her walk slowed to a waddle as her thighs grew thick with fat. Much like Dr. Ling, she grew fatter all over, however she grew so much more than Dr. Ling had with her first picture. Sam wasn't sure if her being thicker to begin with had something to do with it. He knew there was only one way to find out though.