Fluttershy uses Seduce! Twilight is trying to Resist!



Resistance is Futile, Surrender and be Assimilated into the Flutter Herd! ...if you want to...



Fluttershy is enjoying watching her resist, because she knows that Twilight will give in unless a third party provides an out. And she's probably ensured that won't happen sans a real emergency. Plus, all she has to do is give a little touch of the hoof and she'll catch Twilight with a very different Stare. The outcome... is inevitable.