Sherri and Terri's sister

Sherri and Terri's sister is the sister of the twins Sherri and Terri. She was mentioned by J. Loren Pyror during his meeting with Bart; during this, he stated that Sherri, Terri, and the unnamed sister were conjoined triplets, and the third triplet is out seeking revenge after being separated from her sisters. 
==Trivia==
*The sister is a callback to Hugo Simpson II, a character featured in the "Treehouse of Horror VII" mini story "The Thing and I". Hugo was Bart's conjoined twin in the story. Like the sister, he was separated from Bart after the two were born.
* In "The Daughter Also Rises", Sherri and Terri move around like in a three card Monte and then there's three of them, possibly meaning the other triplet does exist. However, it could also mean that Marge started hallucinating after watching the twins' little 'dance'.
* Sherri and Terri's last name ("Mackleberry") was finally revealed in the new episode "Yellow Subterfuge", written on Principal Skinner's list of students. If the third sister actually exists, she probably shares her sisters' last name, but she may not (she may have been adopted out to a different family, for example).
* The sister might have appeared in "Lisa the Vegetarian". Sherri and Terri are in Bart's class, but in one scene a girl who looks identical to them is seen in Lisa's class. This could be an error, but it could also mean the sister exists and she was held back in school.
* In "Lisa Gets an "A"" a girl identical to Sherri and Terri has appeared in Ms. Hoover's class when Lisa sighed about the test, slightly obscured behind Lisa's face. Again, this may be the sister, but it may also be an error.
* She is also mentioned in the Tapped Out! Simpsons mobile game when reaching level 236.
== Appearances ==
*
*
*
*
* (mentioned)
pt:Irmã de Sherri e Terri
Category:Sherri and Terri
Category:Children
Category:Minor Characters
Category:Female characters
Category:American Characters
Category:Recurring characters
Category:Purple Haired Characters
Category:Mackleberry family
Category:Doppelgangers
Category:Nameless characters
Category:Possible characters
Category:Christians
Category:Siblings
Category:Characters with unknown first names
Category:Season 7 first appearances
Category:Articles with conjectural titles
Category:Villains
Category:Twins