They never made promises they couldn't keep. Her fatalism was stereotypical Russian, and he had seen enough war to know that combat make liars out of everyone. They knew that any given mission might require that one abandon the other to certain death.

It never bothered them. The trick was to be fast enough, strong enough, and cunning enough to never be put in that situation in the first place. And if they faltered,...Clint would put an arrow through the heart of the Devil, and Natasha would strangle God with her bare hands if that's what it took to avenge one another.