Natasha is afraid of the Winter Soldier. So when Bucky comes in from the cold and starts living in the Tower with them, she seeks him out and seduces him. Because once you get a man's pants off, he's just human. And it's good. He's hot, he can go for hours, he's trainable and eager to please. She pretends she doesn't care that it's almost too easy, that she just took advantage of someone vulnerable, who barely understands what happened. She tells herself it's only fair, it doesn't matter that the monster is really just a scared, confused kid, he hurt her first.

But now he thinks she's the greatest thing ever. He thinks he belongs to her. Not *boyfriend* because *boyfriend* is for real people who are loved, he's just happy she finds him useful.

She slowly gets to know him and starts to fall for him too.

Bonus No one wants Steve to find out