Doug watched his girlfriend carefully after she shook him off, and listened to the two talk. He was pretty sure it would go from a stand-off to something a bit more friendly, as he watched them move and talk. Then his eyes lit up.
"Nightwing was Robin?!" He asked, excited by the revelation. When both glanced at him, he bobbed his head and stepped back, indicating he was pulling out of the conversation. "Cool. I'll just... sit over there."
He sat on the ledge and watched the two of them, folding his arms. Doug had a feeling Batgirl would want to talk after all of this. Well, he hoped - she was still angry.