- "Somebody take this kid to a speech therapist."
- -Aunt Cakey in the online version
Aunt Cakey is the aunt of Greg, Rodrick and Manny.
She appears in Diary of a Wimpy Kid Online, on November 14 and 25 as cameos, and from then on, has only been mentioned by Greg. She later appears in Diary of a Wimpy Kid: Hard Luck as Susan's eldest sister.
She appears to hate kids and whenever Rodrick or Greg would get bored, she would make them do household work. According to Hard Luck, she had never married anyone and she is Susan Heffley's oldest sister. She had a dog named Rudy in the online version. In Hard Luck, the last time she babysat Greg, she made him sit down on the couch for a long time and then made him take a nap, although Greg doesn't do that anymore, even then. However, when she tells him to not touch the iron, Greg did so. Greg ended up getting a second-degree burn from the clothes iron. It was ages before Susan would let her babysit Greg again.
She has an earring, she wears a black dress, and she has a bun. In the book, she has a rounder face and wears slippers or sandals.
- Diary of a Wimpy Kid Online (First appearance)
- Diary of a Wimpy Kid: Hard Luck