Rarity as simply stunned just by who was visiting her and after some stuttering gibberish she regained the ability to at least speak words normally again. "E-Evening S-Sweetie." The mare gulped at the sight of her sister actually being there. Mostly for the very fact that her changes weren't yet discussed with her sister. Nopony even knew about the being she had become. But knowing her little sister's nature, she and her friends would find it out one day sooner or later.