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1. Bigmouth Strikes Again by trixindenial

   Fandoms: Harry Potter - J. K. Rowling  

   • Mature
   • Underage Sex
   • M/M
   • Complete Work

   07 Sep 2026

   Tags

   • Underage Sex
   • Remus Lupin/Sirius Black
   • Remus Lupin
   • Sirius Black
   • James Potter
   • Peter Pettigrew
   • Minor James Potter/Lily Evans Potter
   • Minor Gilderoy Lockhart/Peter Pettigrew
   • First Kiss
   • Mutual Pining
   • Best Friends to Lovers
   • Idiots in Love
   • Flirting
   • Pansexual Sirius Black
   • Sirius Black Has Internalized Homophobia
   • Sirius Black is a Little Shit
   • Remus Lupin is So Done with Sirius Black
   • Hurt/Comfort
   • Angst with a Happy Ending
   • Pre-Full Moon
   • Remus Lupin feels shit
   • References to past trauma
   • References to The Prank
   • Orion and walburga's A+ parenting
   • Coming Out
   • Somewhat
   • There's a bit of smut towards the end
   • But it's really nothing
   • No Beta we die like everyone in this fandom

   Summary

   Three days before the full moon, Remus Lupin discovers that Sirius Black likes boys (And everyone).

   Two days before the full moon, Sirius starts acting even more insufferable than usual.

   One day before the full moon, Remus finally finds out why.

   Or: Sirius Black is riling Remus up, and the upcoming full moon isn't helping either of their emotional stability.

   Series

   • Part 1 of HP - Marauders era one-shots
   • Part 1 of Kinktober 2026 (I'm not sane and I won't pretend I am)

   Language:

   English

   Words:

   4,517

   Chapters:

   1/1

   Collections:

   1

   Comments:

   8

   Kudos:

   46

   Bookmarks:

   6

   Hits:

   713