It felt entirely too good, and Ianto could feel his control slipping away with every thrust of Jack's length into him. He kissed him harder, groaning. "Rwy'n dy garu di," he gasped against the Captain's mouth in Welsh. "Beunydd." Part of him hoped the other man was as unskilled with welsh as they all assumed. He wasn't quite ready for Jack to know that yet. It had just come out in the heat of the moment.