What did Kakashi/Sakura mean in this scenario? Naruto Shippuden Ep 484 https://youtu.be/V0zyVCjld9M

Ep 484 of Naruto Shippuden. "Exploding people"

Kakashi says "good observation", but neither of them verbally say it.
What did Sakura say without wording it?


  Kakashi: Whoever did it, the genjutsu is unknown to us. It has to be
  the work of someone with extraordinary skill. So it will require someone
  with extraordinary Visual Jutsu powers.
  
  Sakura: looks at Kakashi, startled
  
  Kakashi : (noticing) Good observation.
  
  Sakura : I didn't say anything. blush
  
  Then she punches Naruto offscreen for asking about it.
  
  Kakashi: We might not see anything, but a person with the Sharingan and
  Rinnegan might.
Ep 484 happens after Naruto the last movie.
Prelude to which Sasuke(Sakura's husband) goes away from the village to gather info on Kaguya and help others on his way.
He's has been distant to his family, so Sakura is excited about him being back.

Because he's diligent about helping the village and he's the one with highest visual jutsu prowess, She knew he'd come to help. She's shy about reveling her excitement.