Little backstory to this request: I've been trying to find some old Deviantart story called "Home Alone Stuffed" I used to read all the time as a teen, but it seems like it's been deleted. I do write on my own, but I felt like remaking it myself would sap the fun from it, what with all the dissastisfactions one has with their own writing. Anyway, here's the request:
When their parents leave on vacation for a week in the summer, a teenage girl and her surly older brother are left home alone. The brother fucks off immediately, even though he's been left in charge. The sister doesn't mind though, as she now has the house to herself. Excited at the prospect, she decides to spend her morning watching TV with tons of snacks. A couple of hours later, she realizes she's gone overboard on the snacks, as her stomach feels very full. However, she finds the sensation pleasurable and hey, maybe she should have some more. The rest is kind of fuzzy, she just gets into a bunch of greedy mischief around the house all day, indulging in food she probably wasn't supposed to touch, I think maybe she orders a pizza at one point and hopes the delivery guy gets a good look at her gut? Anyway, she stuffs all day, and then at the end, she's lounging on the couch, pants unbuttoned, massaging her belly. Her older brother gets back, just kinda scoffs and calls her a fatty under his breath or something and then heads to his room.
Specifications: So when it comes to the feel of this story, the appeal came from that adolescent thrill of being home alone and being able to do whatever you want, eat whatever, getting into stuff you weren't supposed to, etc. When I used to read it, that was a feeling I could relate to, but now it'd probably come across as nostalgic. So yeah, that's the feel it captured. Next, reading it as a 14 y/o, I never really questioned the age of the character, but thinking back, she sounds a bit young, so might as well just say she's 18. Obviously since the story centers around her first time with this fetish, it's more about plain stuffing than gaining. But hey, this is fiction, if you want to say she's already putting on a little pudge from eating, go crazy. As for size, she should be average-sized, curvy. I leave the rest in your capable hands.