TJ understands the concept - demonstrations of good faith, anyway. She's not sure how well they work and, given John's reaction, her opinion isn't much changed. She doesn't have a chance to ask him if he's okay before Ianto is picking up the story, but her gaze lingers there to ensure that he's not going to have some other reaction before she shifts her gaze to the other man.

As subtle as Ianto wants to be, she catches the glance at John and doesn't follow it, much as she wants to. Something more happened there, but now isn't the time to satiate that curiosity and she focuses on what he's saying.

"So, how do people dispose of an undead dragon?" The question is posed to Ianto for several reasons; he's answered her questions so far and she's not entirely sure the Colonel is capable of answering.