In reality, Twilight was in no suitable condition to be the liaison she had hoped (and officially vowed) to be. Nopony could avoid the curse of succumbing under the pressure of a turbulent emotional state, doubled by a serious lack of sleep. Twilight herself was no exception. For all of her baggage and experience, for all of her drive and resilience, for all of her determination and desire for success, for all of her hard-fought battles and personal victories, at the end of the day, at her very core, she was still a sister. And despite some recent disagreements, she would never allow anypony to strip that label away from her. She was a sister, and she was forever going to be a sister.