A sequel of sorts to device heretic's Just Words, because I was dissatisfied with the ending, even if it was sort of poetic justice.

To Summarize:
Twilight finds out that she's adopted, from her brother, while he's drunk. Hurt, she goes to her parents; when they admit the truth of the matter she runs off to see Celestia. After a long talk, Celestia emphasizes the value of one's chosen family (or those that chose to be their family), placing that head of the value of biological relations.
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A week later, Celestia struggles with herself; For the first time in years, she really wants to tell Twilight and thinks she deserves to know. Nevertheless, the situation weighs heavily on her. Her past, the possibility of political fallout and disgrace, and Twilight's potential reaction to her callous dismissal of the value of biological relations weigh heavily on her. Still, if Twilight dies, never having known, it would be a crushing blow and an undeserved slight to her former lover.

Rainbow Dash usually had her head in the clouds, but she always thought she knew up from down. When an incredible revelation sends her life into a tailspin, she finds herself at the mercy of emotions she never thought she had, faced with hard questions and impossible choices.

Life is full of changes, but none of them are quite as disturbing as having a horn pop out of your skull…

Original Lauren Faust canon; non-alicorn Twilight, non-alicorn Cadance, no ascension. Diverges from the cartoon after season 3, with nods to later continuity wherever possible. Contains mature themes.

The past always comes back to haunt the present, there is no escaping the inevitable. For decades, Celestia has kept a secret from her student. A secret she made out of pain, and through pain will be revealed for all to see; for Twilight Sparkle is the secret daughter of the Sun.

Now, there will be consequences.

Consequences, they come in all shapes and sizes for every decision. For every action there is an equal and opposite reaction. These words are lessons that Princess Celestia should know, bits of wisdom she practices in her rule of Equestria. How is it then, that when faced with a decision, she chooses the one that would inevitably bring the most pain? How is it that she couldn’t bear being recognized as the mother of her child? And why? Twilight Sparkle is about to find out.

Disclaimer: (I do not own the picture; Title Picture owned and designed by KitsuneHino; Source: http://mel-rosey.deviantart.com/art/By-my-side-364777307) (I do not own any of the characters, places, events, etc. outlined in this fanfiction, MLP FiM does under Hasbro, give them the credit.)