Ours The Fury ~ Game of thrones

Everyone thought there were only three trueborn members of House Baratheon... They were wrong.
Cassia and Asher Baratheon, the only trueborn children of king Robert Baratheon. When Asher was hidden after his own mother tried to poison him after his own birth. Cassia ended up getting herself exiled from Kingslanding at the age of 13.
Cassia is exiled to Winterfell, in the hands of the Starks. Three years later, the royal family visits Winterfell. To see the once southern Baratheon princess, has become a Northern lady that is tough as nails and has her own Direwolf.
When her father and Ned Stark dies and her younger brother; Joffrey takes the throne, she becomes allies with Robb Stark who became King of the north, she meets up with her uncle Renly who had named her the true queen and everyone started looking up at her.
Was Cassia ready to be the queen?
Asher didn't want the throne, he wanted his sister to take it... And he intended to help her get it.