Calling on, inattentive

(I will refer to my sons on my blog, from here on in, as "D" and "E", although in real life their letters are in an entirely different font)

E, calling from kitchen: "D! Did you know that we're going to see our friends in Cary today?"
D, at computer: "..........."
Me, in kitchen: "E, you should stand by him and get his attention first. He gets very focused on his gaming, and isn't listening to us."
D, calling: "I don't listen to anyone when I'm at the computer!"
Me: "Wow. Maybe he did notice us. That was weirdly relevant to what we were talking about."
D, calling: "I don't have any idea what you two are saying!"