Winter Soldier: Idiots.
Natasha: Some of them are, agreed. But not all of us.
Winter Soldier: You think I can’t disarm you?
Natasha: If you take the gun, I drop the grenade. You take the grenade, well, you know what happens…
Winter Soldier: This isn’t supposed to be a live ammunition exercise.
Natasha: Rules were meant to be broken, “капитан”.

From Captain America & Bucky #624, by Ed Brubaker, Marc Andreyko, and Chris Samnee.

Natasha: Barnes? We need to talk. I’ll start. First, thank you for the assist. Clearly, Recluse has been training since we last met.
Bucky: We make a good team. You must remember that much.
Natasha: Now, lets move on to the parts that insult me. Have you really been keeping an eye on me for a while?
Bucky: I—
Natasha: I don’t need you to be my keeper, Barnes. Please tell me there’s more to your presence than that.

From Black Widow #9 by Chris Samnee and Mark Waid.