Crown of the Phoenix - C. A. Varian - Bog

Two Human Sisters.
A Magical Fae Realm under siege.
A Vulnerable Portal into the human realm.
And the Barbarians who aim to take it all.
"Each tick brought her closer to her doom. Tick. Aurelia forgot how to breathe. Tick. Panic consumed her. Tick. She needed to get free. Tick. Before it was too late. Tick."
Aurelia Vesta did everything with her sister, Septima... including running away from home. When their father announced their arranged betrothals, her sister vowed to die before following through with the marriage. Aurelia, determined to find a place where Septima would be allowed to be with another woman, led the way into the Howling Forest, but their late night escape landed the pair in a fantasy realm full of death and danger.
Their new world grants her sister equal rights, but that freedom comes with a heavy cost. Aurelia finds herself among the fae as their world teeters on the precipice of a war, and suddenly the blissful future she'd promised Septima doesn't feel so certain. But, even with the promise of violence hanging over their heads, the Vesta girls find love... until dark secrets and hidden betrayals taint their new lives.
When her closest ally deceives her and a blood-thirsty king threatens to conquer both worlds, can Aurelia find the courage to survive? Or will the magical warfare claim her as a victim?