I'd probably go all out on the feeding aspects. Diet control to promote subcutaneous fat over visceral fat, minimal exercise, pleasuring while eating to get some happy associations with food, and the occasional crash diet to break through plateaus and try to get a nice saggy deflated look. This of course assuming consent and taking health considerations. But yeah...I'd pull out all the stops to get her as big, jiggly, and saggy as possible.
1 year