Let alone asking Michael to keep his real strength hidden, Jasmine didn't even know he was capable of what she just witnessed, that being said the youngest of the Nethereal sisters perfectly kept a calm front in the face of the enemy queen's accusations.
Which is something to be praised about, one must know that until not too long ago the princess of the Light Palace was too innocent even naïve in part because that is her nature and in part because she had a fierce bloodthirsty guard in the shadows in the form of Sarah.
Since the crazy girl has always been sensible towards lust it wasn't hard for her to notice the intentions of the many youngsters from the Elemental Sea's forces that approached her, and so Sarah beat the living crap out of them.