||The title of this article is a conjecture.|
Though the topic is found within The Simpsons universe, a proper name is not available.
| Lenny Leonard's sister
| Character Information
Lenny Leonard's sister is the unnamed sister of Lenny Leonard.
Every Valentine's Day, Lenny dates Carl Carlson's sister and Carl dates Lenny's sister. They like how they can date someone with their best friend's face.
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