Natasha has to wonder how she spent so many years denying the familial bond between them. Because when she sees the tears threatening Yelena's eyes, her immediate knee jerk reaction is to apologize and take it back. Like the older sister that went too far with a teasing joke.

But the truth is always so much more complicated than what anyone carries in their heart. And she knows that's not a promise she can make - not something she has any control over.

So she turns her hands to clasp her sister's, giving them a firm squeeze as she meets her eyes with a sad smile. "I'm not going anywhere if I have a say in it. But I needed to tell you that in case there is something wrong."