[That gets him to raise an eyebrow, and his own smile to widen just a little.]

That is true enough, but you can still be there if he needs you.

[It reminds him of his own life, the ironies of it and how over time, he began to see the truth rather than the cloudy haze he had when he was younger. There is a pause as he lets out a breath, thinks for a moment, then begins again.]

Did I ever tell you how I came to be an Assassin, Natasha?