Jake glanced back up at the photo of himself and his father. When Jake had made himself older, his father grew older as well, changing along with him. Jake was astonished by the gut on his dad's body and wondered how he would look if he were obese as well. The simple thought of becoming obese gave Jake his first erection since making himself older. He quickly snapped himself out of those thoughts as it was his dad after all. Jake then looked at his scrawny body and realized that his body could use some extra weight. Jake then suddenly remembered his fantasies about weight gaining, and was envious about the countless photos and stories of people gaining weight on purpose, going from skinny and athletic to obese. He even thought about gaining on purpose, but backed out as it would have required him to live on his own.
Examining his current weight of 155, Jake opted to put on 50 pounds to see if he can enjoy the new layer of fat before gaining more. Jake clicked "Go!" while confirming the world alteration option once again. Before his very eyes, Jake's body started filling up, with his matchstick limbs thickening and his torso growing a paunch. He was still able to see his privates and his face remained unchanged. Jake felt his torso with his hand, feeling the slight quake of his new fat. His clothes, while looking the same, grew a few sizes bigger. He then glanced at the photo of him and his father. While his father remained the same from before, the man in his twenties looked like he put on some weight compared to before. Although amazed at being overweight, Jake didn't want to be outdone by his own father. Without his father knowing, Jake scanned him to know how much he weighed. "276, huh dad?" Jake whispered, "Challenge accepted!"
Once again at his keyboard, Jake wanted to be larger than his dad, but was not sure how much he should weigh. He first thought about being a few pounds heavier than his dad, but that was not good enough for him. Having his weight in the 300s sounded nice, but that was somehow sounded too low. He didn't feel ready to weigh so much he would be rendered immobile. He eventually settled on doubling his current weight. He realized that going from overweight to super obese would be a huge jump for him, but his gaining fantasy clouded his judgement as he pressed "Go!" once again.
Jake felt his body tingle, with his limbs and torso expanding further. His chest started growing out a large set of man boobs, and Jake even felt a double chin grow on his face. The scruff and sideburns on his face only added more to his rapid transformation to obesity. As the gains were finishing, Jake found himself struggling to get up from his seat. The boner he had for several minutes was throbbing harder than ever, but not only did Jake have trouble seeing it, but it was starting to take a bit of effort to reach it.
Once the changes finished, Jake headed to the full-size mirror in his room while getting turned on by the waddle he had developed. Even with his much larger clothes on, there was no doubt in Jake's mind; he was not only fat, but morbidly obese. Even the photo from earlier had been affected, with his dad having his arm around his morbidly obese son. He felt his body, taking stock at and jiggling his new 205 pounds of fat. Jake weighed himself to make sure he was legitimately obese, and the scale read back the very numbers that made his cock throb once again: 410.
"Jake!" his dad shouted, "Get your fat ass down here, boy! Your mother's brought you dinner!" Even his dad acknowledged his obesity. "Maybe I could have some fun being large!" Jake whispered as he waddled his way to the table before stuffing himself.