Jack hummed in response to Ianto's scolding, pleased at the reaction he was getting out of the other man, at the reaction of what Ianto was doing to himself. Alright, yes, so he was putting on a bit of a show and Jack recognized that, but he sure as hell wasn't complaining.

Jack lightly traced his finger around the skin right above the base of Ianto's arousal, using his fingernail to scratch lightly as he did as well. "Still going in the right direction?" he asked, slyly.