Sulu heard the change in Ianto's tone and knew that he'd said the wrong thing, or used the wrong tone, or something, but he couldn't even begin to unravel it and fix it. Not out here in the cold and the dark, with Ianto looking terrible and his anxiety making his heart pound in his chest. He needed to focus on this as logically as possible and do things in order of importance. Normally, talking would be on the top of the list, but right now...

"We should go inside," he said, quietly and sadly but firmly, because there was no way they were going to be able to talk like this. Not now. He couldn't help but look past Ianto, into the kitchen, remembering how they'd been a little awkward but relatively upbeat, forcing strange teas on a sick Jack, and it made him ache. He hadn't even seen Ianto smile, not more than a little, since... "I can make something to eat, or help you upstairs." Those were the only options Sulu could even see, and he wondered for just a second if those were going to be the only options from now on. He swiped the thought away, but he knew it'd come back. One thing at a time, though.