You return home after a long adventure, you knew it was right to leave your friend behind, as much of a fighter as she was she could never really hurt anyone. Leaving her behind to manage a new restaurant/bar was the right decision.
You open the door to find a massive girl wearing a ill fitting cow apron, you start to ask her where Tifa is until you notice although massive some of her features were unmistakable. Your childhood friend now weights 500 pounds and doesn't seem to be slowing down at all.