Ianto had gotten good at ignoring the looks that Martha could give. If he reacted to everyone, he'd just be a nervous wreck. Wondering if everyone saw them, that they thought it might mean. Ianto didn't like a whole lot of attention on himself, even when it was in his friends circle.
He took a fresh mug down from then cabinet and poured his boss a fresh cup, passing it off to him. "Just remember Jack, a real lady always leaves something on her plate," he smirked. He squeezed Jack's arm, moving to his desk to pick up a few folders to sort and put away.