Random shower thought I had today:
Mr. and Mrs. Cake unexpectedly recieve a visit from Mr. Cake's brother. Initially, they're excited, until they realize that he's here on business. See, Cake-bro married one of their childhood friends, a little runt they called "Debbie." With her budding business sense and her husband's skill in baking, she developed their mom-and-pop shop into a major commercial bakery, with sales all over Equestria.