Same Tests, Different Scientist

Chapter 4: Toffee is The Best!

"Glad you enjoyed our time together. I need to go finish documenting this session..."
He picked up his clipboard, already writing more notes, and headed for the door.
"I'll be sure to check on you later, you overgrown hippo. Can't have you rolling into any valuable equipment now."
"Y-your just going to leave me here...?"
Sin whimpered a bit and looked up at the scientist. Obviously Sin has issues being alone, especially when being weighed down by his own tremendous gut. Toffee looked to him, sensing how anxious he was.
"Well, I suppose the paperwork isn't going anywhere." He set his stuff back down and headed over to Sin.
"Besides, I really should be here to at least oversee how large your body gets." Sin began to smile again seeing that Toffee would stay.
"Yayyy! Thank you Mr Toffee sir!"
His eyes were lit with happiness as he continued to rub his gut soothingly. "No need to thank me you cow, I'm just doing my job"
He started inspecting Sin, putting his ear up to Sin's stomach. He heard loud gurgling, as Sin's digestive system was working overtime.
Stepping back to get a good look, it was apparent that Sin's features were all visibly growing with extra weight. Sin's arms and legs began to put on a tremendous amount of fat. He soon found it hard to move them. Even his chest, neck and face was packing it on too!
"S-sir.... I feel really heavy.... c-can't move my arms or anything!" He whined looking up at him. Whenever he did try to move a limb it jiggled about and made him instantly exhausted. Toffee appeared unconcerned.
"I wouldn't worry about it, according to our calculations, along with your metabolism, you really shouldn't get too much larger.
If you were really worried, you shouldn't have eaten so much. Nothing for it now, you big beached whale."
Toffee groped his growing body as he spoke. "Ah-hn~~! P-please... can you play with my body more Mr Toffee sir....?"
Sin was blushing a bright red as his body finally finished filling out with all of the fat. He looked as if he had been gaining all of his life up until now. He was truly a huge fat slob. "Usually I don't do requests, especially not from somebody so helpless they can even lift their arms, but I think I can make an exception"
This was a bold faced lie. In fact, it was Toffee's favorite part of his job.
"I'll just make myself at home, let me know if you can even feel anything under all this extra cushioning"
Toffee jumped up, managing to clamber up on top of Sin's distended belly.  "Ngh~~!" Sin felt the pressure of Toffee on top of his gut. It made him release a squealing moan as his whole body jiggled and wobbled with fat.
"I'm so big.... I feel.... great..!"