Fallen (Book Four: Supernatural fanfic)

Octavia the Angel is the wife of Sam Winchester. They have two Nephilim daughters, on the good side of things, Ariel and Faith Winchester. Last book, Ava had been taken by Angels and the British Men of Letters who brainwashed her to try to control Ariel and Faith, and to kill Lucifer's sons, who are named Jack and Kai. Ava doesn't want to hurt or kill anyone, but when the spell forces her to lash out, she can barely control herself. Ariel and Faith could heal her little at a time, but if they went too far, they would potentially make the damage on her mind permanent and worse than it is. And if they went too long without healing Ava, then Ava would completely lose it. While Octavia knows that she doesn't want to kill Jack and Kai, the effects of the spell want her to, and there is a huge conflict inside her mind and body that Sam, Ariel and Faith have to help her control. Jack and Kai know for sure that Ava doesn't want to kill them, and want to find a way to help Ariel and Faith heal her. But what happens if Ariel, Faith, Jack and Kai are all trapped in the Apocalypse World when they're trying to save Mary, leaving Ava without someone to heal her the right way for months, making her worse until she gets her daughters and two boys she cares about, and her mother in law back, especially when her ex-boyfriend Gabriel is revealed alive and complicates matters?