Who is Aunt Martha?

Aunt Martha, Mister Ed Wiki

Aunt Martha (Sleepaway Camp) Goodness no! That Wouldn't do at all! Poster for Sale by WilliaHarlan

Kittens for Tea Towels #3606 Aunt Martha's Hot Iron Embroidery Transfer Pattern

Martha Thomas, Sleepaway Camp Wiki

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Sometimes Aunt Martha Does Dreadful Things (1971)

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Aunt Martha's Health & Wellness

Great Performances in Horror: Desiree Gould as Aunt Martha in Sleepaway Camp - iHorror