"Oh come on, pleeeease, pretty pretty please? I'd tell you if it was you!"
He settles back into his desk chair and thinks. "I can't leave Ianto in the dark on it. There was this time... Well, I can't really tell you about it, that's his private business, but it'd hurt him if he thought either of us was hurt by that. He needs to know that we're just teasing. As far as the Doctor, though, oh I can fake it."