Sulu had realized fairly quickly that he'd said something a little awkward just then, but when Ianto started to blush and stammer, he couldn't help but smile. This was something... normal. He could handle this. And Ianto didn't sound exactly upset about the idea of them sleeping in the same bed, just... surprised, and flustered. Definitely flustered.

He had been about to respond when Ianto's phone rang; he shifted as Ianto stood, nodding slowly at his explanation. "It's fine," he said, even though he had to admit, he was a little surprised that Ianto was so quick to leave him when John called. It was about his health, though, and there was a sort of confidence between patients and their doctors that prompted people to talk privately, but still. He would have liked to know what was going on. But he wouldn't let that get to him. Ianto was his own person, and he was already very private; who knew what the two of them had to talk about, specifically. All he could do was wait; wait, and maybe move the lamp from the kitchen back into the living room. ...Yeah, that would keep him distracted from Ianto's sudden absence.