Sakura looks as stressed as Sasuke had been while she watches Sasuke grab for Naruto. She steps forward and reaches out to try and stop it, expecting a fight, but there's no reason to. Instead she listens, soaking everything in because they're talking about Itachi.

What do you know, Naruto?

Before Sasuke can answer, Sakura interrupts. "Loves Sasuke-kun?" she looks as disbelieving as she sounds while she darts her eyes between the two of them. You didn't kill someone's clan to show someone you loved them! What sort of messed up line of thought was that?

And obviously it's not all that matters because of what he had done to both her teammates. He's the cause of so much strife.

But then, why would he say it? Naruto did know something that's changed his whole perspective on Itachi and Sasuke and he forgave. It's something only a few people knew. Slowly her eyes narrow, but she looks just as disoriented as ever. Kakashi isn't here to stop Naruto now. If she could get him to spit it out...

"How do you know that, Naruto? How could you know such a thing?"