Ianto coughed into his whiskey, face a little red. Well if Tony was willing to make a joke like that, he couldn't have been too bothered. Or he had the same coping mechanism as Ianto, and he was covering up his reactions with a sense of humour. Either way, he was glad he hadn't had to bolt from the room to avoid arrest, although he never really thought Tony would go that far.
He never planned on bringing it up again. It had been said once, and that was enough. If he saw them together he'd know, but then there was also Gwen. More complications, and ones he doubted he'd ever explain.
"I shall keep that in mind sir, and if I ever plan on making a pass, I'll be sure to hack into the system and disable it." He might not have been a genius, but he was from another decade. He could likely do some damage if he really wanted to. Jack could probably turn New York upside down with his wealth of knowledge.