At least this time there was comfort. Ianto made himself take it, though he didn't really want to. He didn't really want much of anything. Still, Jack was warm, very warm, and maybe it'd melt some of what was holding Ianto so cold and quiet.
And eventually he'd ask Jack what had happened to him, but for the moment, Ianto was lost in his own pain, trying to drag himself out of it. He just let Jack rock him, moved with it, maybe even clutched a little at Jack's hands.