Natasha: Are we still friends? 
Clint: That depends on how hard you hit me.
 
Tony: They're comin' for you. 
Natasha: I'm not the one that needs to watch their back. 

Steve: I'm sorry Nat, I can't sign it 
Natasha: [Gentle and reassuring] I know 
Steve: Then why did you come here? 
Natasha Romanoff: Because I didn't want you to be alone.