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1. Not All Bad (Keeping it in the Family) by dystopianRebel

   Fandoms: Harry Potter - J. K. Rowling  

   • Explicit
   • Underage Sex
   • F/M, Multi
   • Work in Progress

   26 Jan 2026

   Tags

   • Underage Sex
   • Sirius Black/Bellatrix Black Lestrange
   • Catriona McCormick/James Potter
   • Mary Macdonald/Marlene McKinnon/Dorcas Meadowes
   • Lily Evans Potter/Original Male Character(s)
   • Sirius Black & Remus Lupin & Peter Pettigrew & James Potter
   • Minor or Background Relationship(s)
   • Sirius Black
   • Bellatrix Black Lestrange
   • James Potter
   • Lily Evans Potter
   • Peter Pettigrew
   • Remus Lupin
   • Marlene McKinnon
   • Mary Macdonald (Harry Potter)
   • Dorcas Meadowes
   • Original Nott Family Characters (Harry Potter)
   • Original Greengrass Characters (Harry Potter)
   • Catriona McCormick
   • Minor Characters
   • Alternate Universe - Canon Divergence
   • Alternate Universe
   • Alternate Universe - No Voldemort (Harry Potter)
   • Alternate Universe - Arranged Marriage
   • Black Family Feels (Harry Potter)
   • The Black Family Marries Off Fast
   • Arranged Marriage
   • But Not Married Yet
   • Marauders Era (Harry Potter)
   • Marauders Fourth Year at Hogwarts
   • marauders fifth year at Hogwarts
   • Yule Ball (Harry Potter)
   • yearly yule ball
   • Yule Balls are Hogwarts' Prom
   • Sirius Black Has a Crush
   • Sirius Black Has a Crush on Bellatrix Black
   • Bellatrix Black Has a Crush
   • Bellatrix Black Has a Crush on Sirius Black
   • Bellatrix Black is Sirius Blacks' Fiancee
   • Fluff and Humor
   • Attempt at Humor
   • Andromeda Black is the Eldest Sister
   • Narcissa Black is the Youngest Sister
   • One-Sided James Potter/Lily Evans Potter
   • Slightly Naive Sirius Black
   • POV Sirius Black
   • Sirius Black is So Whipped
   • Sirius Black is a Tease
   • Good Bellatrix Black Lestrange
   • Fond Bellatrix Black Lestrange
   • Incest Fest 2025

   Summary

   Sirius has been arranged to marry his cousin, Bellatrix, since he was born. It’s not even something that he often thinks about, let alone dwells on, but his friends think he should definitely be more concerned by this very simple fact of his life.

   Language:

   English

   Words:

   3,363

   Chapters:

   1/?

   Collections:

   1

   Comments:

   9

   Kudos:

   58

   Bookmarks:

   5

   Hits:

   623