Finn has brewed a new potion to make him big and strong. However, experiment doesn't go as planned, and he ends up with a growing goo in his belly~ :3

Transcript, done by the audio artist:
"Finn tests a new potion he has made. His goal is to make a growth potion that would make him big and strong. Instead, the potion causes his belly to inflate. He could be in a shocked/worried state at the beginning, trying to quickly find an antidote, but then he starts to enjoy the feeling of being bloated more and more. After being fully inflated, he would just relax while rubbing and petting his belly."

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Thumbnail art:
Original art: https://www.furaffinity.net/view/38444003/ (nsfw)