Well think we know the royal Family, right? Celestia, Luna, Princess Cadence, Prince Blueblood, SHining Armour, right? WRONG! Just read to find out.
(A niece is the son or daughter of your brother or sister)
Facts
1. Cadence is the niece of Celestia.
2. Celestia is Cadence's aunt
3. Cadence used to foal sit for Twilight when she was approximately Twilight's current age.
4. Twilight is pretty young.
5. Shining Armour is about the same age as Cadence.
6. Celestia is over 1000 years old.
7. Luna is over 1000 years old.
8. Luna is younger than Celestia.
9. Celestia is older than Luna.
10. Prince Blueblood is only distantly related to Celestia.
11. Princess Luna and Celestia's Mother and Father are 'not in the picture' so to speak.
If Celestia is Cadence's aunt, then Cadence is not the daughter of Celestia.
If Cadence is not the daughter of Celestia, then one of Celestia's siblings is her mother.
If one of Celestia's siblings is her mother, then either Luna or some other pony is her mom.
PROVED TRUE
Next up....
If Cadence used to foal sit for Twilight when she was about Twilights age, then there is not a very large age difference between the two.
If there is not a very large age difference between the two, then Cadence is only somewhat older than Twilight.
If Cadence is only somewhat older then Twilight, then she must be less then 1000 years old.
If she is younger than 1000 years old, then she cannot be the daughter of Luna because Luna was trapped on the moon for 1000 years.
If she cannot be the daughter of Luna because Luna was trapped on the moon for 1000 years, then some other pony must be her mother.
If some other pony is her mother, then Celestia and Luna must have one other brother or sister.
Everything is explained is the Family Tree.
[img width=510 height=310]http://i48.tinypic.com/2ic4i09.png[/img]
Therefore, there are Three of them. Celestia, Luna, and the mystery sibling. The question is, WHO IS HE/SHE????
Feel free to make your own brother or sister of the Royal family here: http://generalzoi.deviantart.c…or-Full-Version-254295904
THEORIES
1. The 'mystery sibling' did something so terrible, they were exiled, and NEVER mentioned.
a. Murder
b. attempted assassination of Luna or Celestia
c. Tried to take over Equestria
2.
Awesome.
My MAJOR THEORY: The mystery sibling was outcasted and not removed from the royal family tree. Being outcasted made him/her angry that they attempted murder and failed. Then they were removed from the royal family tree and their name was never mentioned again. They attempted to captivate Celestia or Luna and failed. Then they were banished and any mention of his/her name or apperance was taken away from the following: Family Photos,Paintings,history books,Glass windows (You know what I mean.) and so on. Then they were never mentioned again and forgotten.