This story is a sequel to Apprentice Ship

Princess Celestia's life has been changed many times by Twilight Sparkle, and always for the better. From being Celestia's most successful protege, to returning her sister Luna to her, to saving Equestria from foes even Celestia could not face, Twilight has been a constant source of joy in her life.

So what happens when Twilight tells the very symbol of Equestrian beauty that she's fat?

Celestia panics, of course!

Celestia receives a letter from Twilight, the first in a long time.

A letter about the Cutie Mark Crusaders and how Twilight has changed since her arrival in Ponyville.

It makes a seemingly solitary Celestia think...

Edited by the fantastic GaleSinger

Art belongs Nadnerbd

Celestia is struggling to come to terms with her true feelings for Twilight.

Unwilling to watch her sister suffer under apathy and indecision, Luna takes it upon herself to help Celestia confront her newfound feelings.

First contact. Not just with a new world, but with a world in a whole new universe. Initial negotiations go well, so Princess Celestia makes a visit to this 'Earth' to cement peaceful relations. Unfortunately, even when you are as experienced as the goddess of the sun, it's the little things that can trip you up.

Preread and edited by Noe Carrier. SPOILERS IN COMMENTS!
Russian translation: Все это скоро закончится, принцесса by Smikey

Princess Celestia tires of constantly being surrounded by decorum, deference, and formality, and decides to take a day off from being Princess. But visiting Ponyville incognito is harder than she expects. Will she be able to fit in and make friends without blowing her cover?

"...we could be stuck doing this for all eternity!" Twilight said.
"That's fine with me!" Starlight responded.
Starlight never thought that Twilight was actually being serious.

What would have happened if Starlight hadn't turned herself over to Twilight? If she rejected friendship, even after being given a chance to come back?

Starlight Glimmer is strong. She always has been. She always will be.
But Twilight wants that to change.

Orphaned from birth, with only the memories of a soft touch and gentle voice to remember her by, Twilight yearns for her mother. What pony wouldn't want to know why they were abandoned, why they were left to be found by the Princess of the Sun herself.

That was nearly two decades ago though. Twilight was older now, and hopefully wiser. She is happy with her two best friends, Cadance and Shining Armor. They are like family to her, the brother and sister she never could have. Though dreams still haunt the young mare, dreams of lullabies and tender kisses, she has moved on.

The personal servant to the Princess of Helios, the land of the Sun, Twilight enjoyed both rank, and knowledge. But it also means that when Princess Luna comes to visit her old friend, Twilight is given the task of tending her. The Princess has come in search of marriage, at the behest of her ruling Council. They demand an heir to ward off the potentially catastrophic attacks of the neighboring dragons.

Soon, Twilight will be tested and tried. She will be given the a choice between the life she has known, and the duty she is sworn to. But never, not once, will she forget.

For who can stop loving their mother.

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

Sequel to Let the Silence Sing!
Big Macintosh is dating Princess Celestia, and now all of Equestria knows thanks to a certain foal photographer. Dating a Princess is hard, thanks to her demanding schedule and his work at Sweet Apple Acres. The two rarely speak to one another during their get-togethers, but the silence sings between them.

Princess Twilight Sparkle has been losing her mind. She lives plagued by nightmares and hallucinations.

Discovering she's not alone, Twilight realizes Equestria may be in great danger. She seeks counsel with Princess Luna to discover the truth about her nightmares. However, Luna warns Twilight the knowledge she seeks will come at great personal cost.

Twilight Sparkle would give up anything to save Equestria, but how much will she sacrifice just to learn the truth?

Special thanks to Bradel for his editing advice.