"It's not mine to talk about in detail," she says, and while there's something a little bit rueful in her voice, it isn't exactly apologetic. She suspects he'll understand that, guarding other people's private lives.

"But - talking with a couple of people got me thinking about how I would feel, losing someone I cared about here and not being able to do anything to stop it. And how I did feel, when I found out Natasha wasn't planning to use a deal to come back home. It isn't the same thing, because I'm not in the position to make any calls there, but I am good at extrapolating."