No. Importantly, this is NOT a rejection romance. Caine never formally rejects Grace. Instead, it's a reluctant mates dynamic where both parties resist the bond for different reasons—Caine because she's human, Grace because he killed her pack.
The chapter describes Grace as "oblivious" with the fan blowing hair across her nose while she sleeps. This suggests she doesn't know about Caine's nocturnal visits, though she may suspect given his behavior changes.
Extremely. Chapter 37 ("Caine: You Touched Her") shows his violent reaction when anyone touches Grace. He also tracks her when she runs (Chapter 41), sneaks into her room (Chapter 221), and maintains constant surveillance.
Caine uses his Lycan senses to track Grace's scent trail. In Chapter 41, he pauses at her door to inhale the fading scent, then follows it. His supernatural tracking abilities make it extremely difficult for a human to hide.
Caine doesn't believe Grace belongs in his world. He considers her too fragile as a human and doesn't want to put her in danger. His cold, powerful demeanor masks the internal battle between his sense of duty and the mate bond pulling him toward her.
Separation causes distress—Caine's head pounds when Grace leaves (Ch. 214), and he immediately sends someone after her. Grace likely experiences similar discomfort, though her human awareness may process it differently.
Grace's ex failing to greet the Lycan King at his territory border is a grave insult in wolf society. It may indicate defiance, ignorance, or cowardice—all of which would provoke Caine's wrath.
There's a massive power imbalance. Caine is the most powerful wolf shifter alive; Grace is a regular human. Yet Grace refuses to be cowed by Caine's authority, standing up to him repeatedly and maintaining her moral principles even when outmatched.
Caine murmurs against Grace's ear: "Are you in control?" Grace flinches and buries her face in his neck, responding "Of course I—oh." before being interrupted by a strange sensation, suggesting her arcana or the mate bond is acting unpredictably.
Grace describes Caine's scent as similar to a "cologne ad"—meaning he smells incredibly appealing to her. This supernatural attraction through scent is a hallmark of the mate bond, making it difficult for Grace to maintain distance.