Ianto's being very quiet, now, and still, back to his usual watchful stoicism after the loss of control Jack coaxed out of him. The feeling of all that attention focussed on him, however casual Ianto looks about it outwardly, is something Jack very much enjoys, and his heart skips a little bit faster as he scoots backwards a few inches to make sure Ianto will have a good view as he tips a bit of lube out onto his hand and then wraps that hand around his own cock, inhaling sharply at the initial chill of the lube and the first touch his sensitive flesh has got tonight. He starts to jack his cock gently, just to release a bit of the tension of anticipation, really, before he starts on his ass. He lets his free hand wander over his stomach and chest, sucking in another breath as he scrapes a nail over his nipple, his cock jerking in his hand.
His eyes stay tight on Ianto's face, his own open and expressive, letting him see everything the actions of his hands do to him.