Well she won't obviously. Since we pretty much know this series is going to come down to Naruto vs. Sasuke, whatever she tries is going to fail. Because Sasuke has plot armor.
I'm just really hoping she at least had a more complex plan that the one we've seen in the last 5 seconds of this episode. Cause it's just a really stupid plan if it doesn't go past "Pretend to join him, then backstab him later."