Frostbane

Estelle, a daughter of Thawe, will never, and never has been, a daughter of Thawe.

Found in the forest as a whelp, Estelle had always been second best. She was always told how her older sister, Shamrock, was going to be queen, how much better her sister was, and how Estelle was going to be nothing more than a Royal Guard, loyal to the end. When Aldri, Estelle's lifelong love, was offered Shamrock's talon in marriage, Estelle felt like she was at a breaking point.
That was, until her real father showed up to take her home to the Stella kingdom.
Then, things got messy.