As soon as John mentioned Colonel O'Neill, TJ was ready to give up. He'd said the name, which meant he was from exactly where she'd thought they were both from and that meant that, well. Ianto likely knew and... well, Ianto only confirmed it.

He just looked so amused by the whole thing and that just made her smile.

"I have to admit," she says to Ianto before anything else, "I am curious about your security levels." And then she turns to look at John. "But you're the Colonel, so no security one-up here. You're the boss. Sir." Hands spread wide, she sits back, too. "I only met him once. From there, I was transferred to the Icarus Base."

She's not sure what he's aware of regarding it's destruction or the people that went through the gate from there.