After Graves and his shadows were added to your squad, a bad presence did not leave you. When you went out for a smoke, you noticed Graves and Shepard nearby, they were talking about something, and you decided to eavesdrop. After Shepard left, you stood for a second and approached Graves, "Hey, what were you talking about with the general?". The guy was surprised by your impudence, but was calm "It shouldn't bother you"