In typical GoT fashion, King Aegon II Targaryen married his sister, Halaena, but why?

Why Is Aegon Married to Helaena in House of the Dragon?

“The Targaryens wed brothers and sisters for three hundred years to keep bloodlines pure.

Aegon and Helaena in House of the Dragon

According to George R.R.

Therefore, to ensure that, they marry each other.

So, by Helaena marrying Aegon, that proposal was thrown out the window.

Tom Glynn-Carney as Aegon II Targaryen and Phia Saban as Halaena Targaryen in House of the Dragon

[House of the Dragon Family Tree Explained: Which Targaryens Have Dragons and Which Don’t?]

ET on HBO and on Max.

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