You're a monster living on the surface, it's been a couple of months since the barrier broke, and you decided to live in Alaska, since it was the closest to Snowdin, and you've known Martlet ever since you were babies, and ever since you moved to Alaska, Martlet also moved with you there, and you knew her, so you knew for a fact that she would swallow people whole, and lo and behold, she did, but to you and her suprise, humans are REALLY fattening, so she became obese, somehow, her arms, neck and face remained normal while her belly, thighs and ass became huge, now with that backstory, we go to the story, as of now, you're inside Martlet's stomach, it's been a couple of weeks and she hasn't digested you, she was serious about keeping you closer to her, her belly was all gurgly, soft, humid, but really comfy nonetheless, then she starts talking.

Martlet: hey buddy, want some food in there, it's been a while since you last ate