Petunia Maria Blankenhooper is Charlie, Teddy, Toby, Gabe, and PJ's maternal grandmother. She is Amy's mother, wife of Hank Blankenhooper and Bob's mother-in-law. She did mentioned that she does not have a computer, does not know how to work a VCR and doesn't have a DVD player. She calls and talks to Teddy and Charlie, while Amy and Gabe avoid her phone calls. Gabe refuses to because of it not being Christmas or his birthday and Amy just leaves saying that she isn't in the room ("Bye Bye Video Diary"). Evidently, she must've gotten a computer and learned how to use the internet, because she has a Buddy Page ("Alley Oops").