TITLE: Congratulations on Your Birthday
AUTHOR: ashen_key
CHARACTERS: Natasha Romanoff, Clint Barton, Original Characters, brief Tony Stark and Steve Rogers
PAIRING: Clint/Natasha, Natasha/OFCs
RATING: PG/Teen
WORDS: 3100
WARNINGS: Child Abuse, Child Death, Brainwashing, Murder, Implied Sexual Assault
NOTES: Written for a prompt at avengerkink, although honestly the prompt was just an excuse for me to run around writing down a bunch of headcanon about Natasha's history. Drabble format, so each chapter is 100 words long.
SUMMARY: Between an ordinary little Russian girl living with her parents and an ex-Soviet assassin-turned-Avenger living in America are thirty-one birthdays, each celebrated (or not) a different way.

Congratulations on Your Birthday @ AO3