Looking for Weight gain story

Like 2 years ago I read a weight gain story that I liked but I can’t find it anymore. I don’t remember much the details but I think it was about a boy who wanted a big sister and then the next day he suddenly had one, stuff happened and I remember at the end she started to eat a lot of food her brother made until she broke the chair then it ended with her eating ice cream. Like I said I don’t remember a lot of the details. It was on deviant art aswell, if anyone can find this story it will be very appreciated.

Could it be this…?

https://www.deviantart.com/lord-oz/art/My-Transfer-Foster-Sister-Can-t-Be-This-Fat-1-497728887