[He pauses at Kitty's comment, because it's a very valid one from her perspective.] I promise it's not. We're together normally but he's different today. Everything's different today. [He holds her eyes.] If you're not comfortable wtih this, Kitty, I don't mind if you want to go. I can manage him fine on my own. I've done it before and I can do it again.
[And yes, Ianto, he is talking about Lisa. This feels like a good time to remind him how incredibly serious this is, and just how much trouble he's in.]