Ianto smiled gently, nodding slightly and brushing his fingers gently across the fabric of Sulu's shirt, rubbing gently against his chest underneath it as well. Because he did. He did know. Just because Sulu hadn't said it, that didn't mean that Ianto didn't know. It didn't mean he'd mind to hear it, of course, but. He was used to reading the signs more than hearing the actual words. It was the same with Jack, who had never said the words either, even after all this time. But that was alright, though. Just because he hadn't heard it, that didn't mean that he didn't know

Granted, Ianto himself hadn't really said it that many times, either. Just the once, in that room, dying in Jack's arms in front of that tank of poison air that housed the 456, he'd said it. He'd felt it long before that, but he said it then because he couldn't not. He couldn't die and leave the pair of them not knowing, in case he hadn't made it clear...

"I know," Ianto said softly, after his own moment of silence. "And I'm glad of it. I mean everything I say to you, after all. It's only fair trade."