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Chapter 6 by BoobSweat BoobSweat

What Class?

Biology Class

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      My Sister is Bigger (unironically)

      Foreals this time

      This is simply another version of my previous story, but instead of being satire, it's serious. In this world the main character is a male, he has a little sister, and her penis is much bigger than his. All that is typical of this scenario will ensue.

      POV
      1st Person, Male
      Category
      Cheating Spouses
      Language
      English
      Mode
      Public

      Updated on Oct 7, 2025 by BoobSweat
      Created on Jun 5, 2021 by Torcoolguy

      • 677 Likes
      • 315,594 Views
      • 727 Favorites
      • 197 Bookmarks
      • 14 Chapters
      • 14 Chapters Deep

      Comments moved below the chapter.