Not at all. You probably missed why she is smiling. actually, it is not a smile. Rather, she is mocking. See, Naruto countered her blow, or we could say that Naruto thought he has countered her blow, but she had a second blow coming that naruto did not know. therefore, she start mockingly smiling because she is seeing how inexperienced naruto is. Then, afterward, she found out that Naruto actually tricked her by distracting her so that Sasuke can cut her into pieces.
Well, see the next panel for yourself. She had a very ugly anger face showing that she is pissed off by being tricked by some teenagers. This is why she show off her power next to blow Sasuke's PS away.
Besides, she cannot solo Naruto as she wants. In case you don't know, Naruto is pretty much invincible right now.