[ No sound isn't going to work for him - not even that small change in breathing is enough, satisfying as it is along with being able to tell Sylvain's harder than before he'd somewhat advanced down his shaft. That means it's time to exercise that loophole again to have a little added fun as this time when he gets back to the head of the other's cock he lets it slip out from between his lips as he sits up but not quite fully - just as a reminder of what he could be doing. ]

Don't worry, I know you missed the sound of my voice. [ Said with deep concern while he makes up for the lack of contact by shifting the hand he'd had wrapped around the base of Sylvain's cock to bring it up his length in a much firmer stroke than the lighter ones before. As he pretends to appraise the other man's face - a poor disguise for blatantly checking for any reaction - he lets his thumb trail across the head. ] If you're going to be quiet then one of us has to make noise, don't you think?

[ The question ("question") is hardly out of his mouth before he moves back into a steady pace with his hand along Sylvain's cock. He's helping, after all, even if it's not what was requested just to see what might happen. ]