That was precisely what frightened her - there could be no illusions about who they were to One another if their every Vulnerability was exposed by the mirrors. Flirting and teasing was fun while she had anonymity to hide behind. Once that was gone though...
Valencia had half a mind to reveal herself then - drunk or not - but then he was challenging her and all thoughts of a reveal fled. "I am afraid of much and yet somehow my reflection has never made that list. A maze is simply not enjoyable by oneself." That Don Juan wasn't afraid of his reflection wasn't at all surprising, but Valencia would've been lying to herself if his ability to remain unphased didn't sting.
Valencia had half a mind to reveal herself then - drunk or not - but then he was challenging her and all thoughts of a reveal fled. "I am afraid of much and yet somehow my reflection has never made that list. A maze is simply not enjoyable by oneself." That Don Juan wasn't afraid of his reflection wasn't at all surprising, but Valencia would've been lying to herself if his ability to remain unphased didn't sting.