I remember a story where a guy takes up the job of being a tutor for his best friend's chubby sister. He finds her attractive but her family wants her to lose some weight but he enables her to eat more. I think there's a part where he goes to her house when his best friend is out. I know it ends with him now being her caretaker. Parts I remember include it opening with him and his best friend playing xbox while the sister reads. Tutoring in her room while she is eating, and it ends with them eating at the table and then the guy takes her up to her room. This had to be from more than 3 years ago so it may have fallen off the face of the earth and I can't for the life of me remember the website.