Chapter summary: Natasha screws Clint and begins her journey to slutdom.
Disclaimer: I do not own any Avengers characters, plots, or ideas. I am in no way affiliated with Disney or Marvel comics.
The way Natasha saw it, Clint was her first. By no means was she a virgin when she met him, but he was the first one she screwed just because they both wanted it, not because of any emotions. So he was her first step to slutdom.
The first time they did it they'd known each other for a year and the sexual tension had reached such a high point they just had to give in. It was after a mission that went horribly wrong. They'd lost the other agent working with them and each had two bullet wounds. It was hot, fast, thank-god-we're-alive sex.
It happened after they'd gotten to a hotel. Natasha's top was off and Clint was bandaging her arm and having a hard time keeping his eyes from straying. She wasn't sure how it had happened, or who had made the first move but all of a sudden he was on top of her lavishing attention on her breasts as she struggled to get his pants off.
When all their clothing was on the floor and he'd checked that she was on birth control, he roughly shoved two fingers into her. She gasped, but the pain was nothing compared to digging bullets out of her arm. After giving her a moment to adjust, Clint started moving his fingers back and forth, roughly fucking her with his hand. By the time she was wet enough to add a third finger, his cock was so hard it was painful enough to distract from the bullets in his shoulder and thigh.
She noticed Clint's face tighten in even more pain and jerked off his fingers, easily flipping him on to his back. She straddled his waist, with one knee on ether side of his stomach and in one motion lowered herself onto his very erect cock. They both groaned loudly at the contact.
After waiting a few seconds so she could adjust, Natasha began to bounce up and down on Clint's cock, moaning softly. She leaned forward, pressing her breasts against his sculpted chest. As he got closer and closer to his release, he grasped her long red hair and she arched her back. Just before he came, Natasha reached down between her legs and fondled her clit, pushing her over the edge. Her walls clamped down on him and they came together.
After that first time it became common, before their missions as a sort of pump up, after as a celebration, and sometimes even during when it fit with their cover. Natasha could never be sure if Clint knew that she was having just as must sex with others as she was with him, but since they never talked about any emotions tied in with their relationship she assumed it was fine.