While this may be impossible to imagine, but as it turns out writer George R.R Martin actually planned to hook Arya Stark up with none other than the other Targaryen, Jon Snow. In an original outline for his book 'A Song of Ice and Fire' that the show 'Game of Thrones' is based on, Martin had originally planned to get Arya and Jon together.

Posted on Reddit by TheNextRobin, it told the fate he had thought of for two of the most beloved characters of the franchise. The post was first picked up by Variety back in 2015. Martin reportedly wrote, "Wounded by Lannister riders, they will seek refuge at the Wall, but the men of the Night's Watch give up their families when they take the black, and Jon and Benjen will not be able to help, to Jon's anguish. It will lead to a bitter estrangement between Jon and Bran," he said.  "Arya will be more forgiving ... until she realizes, with terror, that she has fallen in love with Jon, who is not only her half-brother but a man of the Night's Watch, sworn to celibacy. Their passion will continue to torment Jon and Arya throughout the trilogy, until the secret of Jon's true parentage is finally revealed in the last book," he had written. 

If this isn't enough to horrify you a little bit, he had also planned for a love triangle between Jon, Arya, and Tyrion. "Exiled, Tyrion will change sides, making common cause with the surviving Starks to bring his brother down, and falling helplessly in love with Arya Stark while he's at it. His passion is, alas, un-reciprocated, but no less intense for that, and it will lead to a deadly rivalry between Tyrion and Jon Snow," the outline revealed. 

The outline had also talked about a very different relationship arc between Khaleesi and Drogo - that she would kill him and then invade Westeros. 

Incest really isn't a shocker on the show, but thankfully, he changed his mind.