[She almost thinks he's talking about Itachi, almost blurts a 'what' because OBVIOUSLY she does know since she just told him. But common sense kicks on earlier than usual.]

Would it change anything if I did? You lost your family to something horrible, that's enough for me. I don't need to know what happened to know how painful it must have been, Sasuke. How lost you probably felt...

[How angry. Her hands have stopped shaking.]

And I know I'm not Mikoto, and I know I'm not family but if you need anything you can come to me. I'll be here for as long as I can. Even if it's just a story about your mom when she was young. It's the least I can do for Mikoto and for you.

I'll look out for you for Mikoto's sake.