[The question hits him square in the chest. It still stings- failing his first and oldest friend when he needed him the most. As for Steve's interest in sharing the details? He's already let Tony in on the truth, so telling Natasha isn't a matter of trust.

It's just still difficult to talk about.]

He couldn't shake the feeling that they were going to keep getting in his head. Using him. So he made a call. [There's a pause, Steve's gaze dropping slightly.]

He put himself back under the ice. Until we can find a way to fix this.