It's an answer by itself, Tuo's characteristic misdirection and distraction. They both know Dain's answer to that question is not yes, and addressing others' pain is a good way to avoid thinking about your own.

They may both have good reasons for staying circumspect, but -- in the small circle of privacy they have by the door, Dain pulls Tuo into as much of a hug as time, space, and winter layers will allow. "Stay safe," he says, muffled into Tuo's scarf.