Twilight is unable to control her powers during the entrance exam to the School for Talented Unicorns, and in order to reduce the damage caused by her power surges, Celestia shrinks her down until she would later learn how to control her powers.
Have you ever gotten so drunk you forgot you offered the princesses' hoof in marriage to whoever brought your sister back? And how many 'es' there are in 'Princess'?
Celestia goes to extra effort to make the sunrise perfect for a very special holiday. Yet once that is done, Celestia herself is left sad and alone, for she has never been a mother... (A short Mother's Day story.)
A simple and common phrase leads to Twilight writing a letter confronting Celestia's misguided fears about her immortality. A counter to Twilight Sadfics
Princess Celestia recounts her dealing with her guilt over ignoring Twilight Sparkle's warnings about the royal wedding, and the role she has let her student play in fighting threats to the kingdom.
Princess Celestia watches over a sleeping Twilight, thinking about her decision to allow one so precious to remain in a village so very far away from home; wondering if it were truly the right choice, and hoping it wasn’t.
Princess Celestia spends time taking care of a familiar sick little filly, and along the way, learns a lesson mothers - blood or not - all one day learn.