Ava’s discovery that Cade is her biological father turns a long-established guardian-and-child bond into a newly acknowledged father-daughter relationship. The revelation does not create their closeness: it gives a hidden explanation to a family life already built from shelter, shared memories, and years of care, while making plain that Lilia’s protection came at the cost of a truth both Ava and Cade had been denied.

The family that existed before the revelation

Before anyone names Cade as her father, Ava already understands him as home. She and Lilia had spent Ava’s childhood on the run, but sometimes Lilia returned with her daughter to Currant, unable to stay away from Cade. During one winter visit, when five-year-old Ava and her mother were snowed in for a week, Cade gave Ava new pajamas and helped her string popcorn and cranberries for a Christmas tree. With no ornaments, they decorated it with popcorn chains and paper snowflakes. Duncan visited, bringing carved wooden animals that he animated into a tiny procession for Ava. The remembered scene gives the later revelation a long emotional prehistory: Cade was already one of the people who made a home possible.

Cade’s care also appears in the circumstances under which he first took Ava in. About five years before the present events, she arrived on his doorstep drenched from rain, shivering, and grieving her dead mother. He called her a half-drowned rat, then ushered her inside and wrapped her in a blanket. The nickname endured as a form of affection, replacing the earlier Mouse he had used when she was little. Ava’s memories make their intimacy concrete well before either of them knows it rests on a biological connection.

That closeness had developed under the pressure of Lilia’s secrecy. Lilia had fled the Coterie after becoming pregnant, fearing that the organization would claim a child who might inherit Firebug abilities or exploit a human child as leverage. Ava knew that her mother had left to protect her from a life of service and from the Coterie’s control over her family. She did not know that the protection also depended on keeping Cade ignorant of his paternity. Lilia’s care therefore shaped both the family Ava possessed and the facts she could not safely know.

Angela challenges Ava’s account

The disclosure happens during the group’s recovery at Grandma Rose’s, after Angela has warned Ava that her family is not to be endangered again. Ava argues that Venus would eventually have killed Lock, and Angela’s anger softens as she recognizes that Ava, too, had been trying to save family. Angela compares Ava’s attempt to protect Cade with her own determination to protect her son, then refers to Cade as Ava’s father.

Ava immediately corrects her: Cade is her guardian, family but not a blood relative. Angela’s surprise makes clear that she has assumed Ava already knows. When Ava insists that Cade cannot be her father, she relies on the timeline she was given: according to what Lilia and Cade had told her, Lilia had not been near Cade for at least a year before Ava’s birth. Angela asks where that timeline came from and then points out that Ava has no birth certificate. Without that document, she says, Ava has only her mother’s account.

The exchange does not produce a document or a confession from Lilia; instead, Angela offers her own judgment. She says Cade’s chin and nose resemble Ava’s, and that years of experience have made her good at recognizing such things. She is certain enough to swear she is right. The force of the scene comes from the abrupt gap between certainty and proof: Angela sees a family resemblance and challenges the story Ava has trusted, while Ava has no independent record with which to settle the question.

Lilia’s secrecy and the cost of protection

Ava’s first response is disbelief. She has wanted Cade to be her father, but believed that, as she grew older, Lilia would have told her if it were true. Angela’s questions turn that assumption around. Ava realizes that Lilia may have hidden the truth for the same reason she left Cade: to keep him safe. If the Coterie captured them, a child who knew Cade’s identity could reveal it under torture. Ignorance, in Lilia’s calculation, could protect both father and daughter.

The reason fits the danger surrounding Ava’s birth. Lilia had escaped the Coterie because it treated Firebugs as potential weapons and valued the possibility of producing them. Later, Owen tells Ava that her defiance has made her useless as a field operative and that the organization intends to keep her under lock and key for a breeding program. The threat confirms that Lilia’s fear was not abstract: the Coterie sees Ava’s reproductive future as something it can control. But understanding the protective purpose does not spare Ava the hurt of learning that her mother lied, or the shock of discovering that the man she has called her guardian is her father.

Angela, who had been angry enough to threaten Ava, responds to the realization with gentleness. She rests a hand over Ava’s and holds her while Ava sobs. The physical comfort marks a change in their immediate encounter: Angela’s maternal concern now extends to the grief of a young woman confronting a family truth, even though only moments earlier she had been Ava’s adversary.

Becoming father and daughter

The revelation reaches Cade before he and Ava have had time to discuss it. Angela tells him that he is Ava’s father before they leave her forest. On the drive to the Inferno, Ava reflects that she had spent years hoping to meet her father, only to find that she already knows him. The discovery does not instantly supply a new way for them to behave. Their existing relationship is comfortable and familiar, and that familiarity makes the change awkward: they must add the word father to a bond that already has its own history.

A later conversation brings that awkwardness into the open. Ava admits that she had once hoped Cade and Lilia would end up together, though that childhood hope had died; the new reality feels surreal rather than simply bad. Cade, meanwhile, is stunned that Lilia lied to him. He had understood her as someone who might hide things but would not directly deceive him. He also realizes that they do not know Ava’s birthday and that she may already be eighteen. The absent birth certificate, first raised by Angela, now has a second consequence: Cade cannot even be certain of his daughter’s age.

Their shared past gives them a language for this uncertain beginning. Cade calls Ava Rat, the name attached to the night he took her in. When he says he used to hope for a life with Lilia and a family with Ava, she calls him Dad. Only after she has gone to her loft does she recognize that she has used the new name instead of Cade. The small slip matters because it is not a declaration that their old relationship has disappeared; it is the first spontaneous sign that the new one can fit inside it.

An inheritance beyond blood

Alone beneath her covers, Ava summons a blue flame to her fingertip and traces the equation Cade + Lilia = Ava repeatedly in the air. The image joins biological parentage to the family she already remembers: Lilia’s protection, Cade’s care, and a childhood assembled in fragments of safety whenever they could return to Currant. The flame makes the recognition distinctly Ava’s, but the equation’s simplicity also contrasts with the painful complications behind it—flight, secrecy, and the danger posed by the Coterie.

The event therefore resolves a question of identity without erasing the uncertainty and damage that produced it. Ava now knows that Cade is her father, but the knowledge arrives through Angela’s inference rather than a birth record, after Lilia’s deliberate concealment and long after the relationship itself has taken shape. The closing image offers emotional acceptance, not an instant repair: Ava can call Cade Dad and imagine their shared parentage, while both still have to absorb what Lilia’s silence meant and learn how to live with the family they had already become.