Hi, I kinda had some idea and if you would be interested in one?
I'll play as a 10 year old boy, who has the admire of huge obese women. You'll be play as both his mother and younger sister, who are slim-sized at the start, but they want to surprise him and have them grow up fatter to 1,000lbs.
If you want to, let me know either down below or message me and I'll see what I can do.