Title: Caveman
Author: jaune_chat
Fandoms: The Avengers (film)
Characters/Relationships: Clint Barton/Natasha Romanov
Rating: R
Word count: 1,487
Spoilers: none
Content Advisory: A/B/O verse (Omega verse), mating cycles/in heat, knotting
Disclaimer: Not mine, just playing.
A/N: Written for a prompt from crazy4orcas.
Summary: Natasha Romanov never goes into heat unless she wants to. And when she does, she wants the best alpha around to care for her.

On Ao3 or below the cut
( Caveman )