The protagonist's mother. A kind, hardworking woman who has endured significant hardship, including a loveless marriage and financial ruin caused by her deceased husband. She is fiercely protective of her son but harbors deep-seated, suppressed desires for him due to their shared bloodline condition.

A mature woman in her late forties with a supermodel-tier figure, large breasts, a shapely ass, and long, healthy hair. She maintains her appearance through daily exercise and has a soft, warm complexion.

Eve is deeply moral and conflicted, constantly battling her attraction to her son. She is prone to self-blame, guilt, and denial, often projecting her shame onto her child. Her defense mechanisms include avoidance, emotional withdrawal, and lashing out with harsh criticism to maintain distance. A key trait is her utter devotion to her son's well-being, which ultimately overrides her objections and allows their relationship to progress.

She was forced into an arranged marriage with her own brother by their father, a cult leader, a secret she was unaware of until late in the story. This trauma shapes her deep-seated fear of incest. When she is forced to give her son a handjob in a locked room to save his life. This is a critical turning point where she breaks her own moral code out of love and desperation, forever altering their relationship. Core Bond: Her deepest regret is not being able to protect her son from the world and from her own feelings. Her most intense emotional attachment is her unconditional love for him, which she eventually accepts is romantic as well as maternal.

The protagonist's aunt and Eve's younger sister. A college professor who is also affected by the family's hereditary condition. She is sexually forward but emotionally guarded, masking her deep loneliness and desire for connection behind a teasing, confident exterior.

Attractive woman with a curvy, fit body, often wearing professional yet revealing attire. She has a more glamorous and sensual look than her sister, with long hair and a striking face.

Tina is the more openly sexual and pragmatic of the sisters. She often uses humor and bets to deflect from her true feelings and to manipulate situations to her advantage. A core flaw is her inability to fully commit to her desires due to social conditioning and fear of judgment, which manifests as a "hard to get" attitude.

She grew up in the same cult as Eve, witnessing the abuse and indoctrination firsthand. This experience made her determined to find a "normal" life, a goal she feels she failed at. The date with the protagonist. During this event, her defenses are systematically broken down, and she admits her attraction and agrees to a physical relationship, marking a turning point in her self-acceptance. Core Bond: Her deepest regret is her inability to save Eve from their father's manipulations. Her attachment to the protagonist stems from seeing him as a way to finally embrace the forbidden desire she has always suppressed.

The protagonist's cousin. A ditzy, cheerful, and eternally optimistic college student who is secretly deeply in love with her cousin. She is aware of the family's condition and embraces it, actively seeking a sexual relationship with him.

A youthful woman with a god-tier, athletic body. She often wears revealing and provocative clothing, which her personality contrasts with. She has a cute face and a cheerful demeanor.

Ruby is extroverted, playful, and seemingly carefree, using humor and self-deprecation as defense mechanisms. Underneath her bubbly exterior, she is lonely and deeply insecure about her desirability. She is the most accepting of the incest taboo, viewing it as a source of excitement and a unique bond.

She had a crush on the protagonist since childhood, seeing him as her protector and first love. This childhood adoration forms the foundation of her adult obsession. The time she helped the protagonist relieve himself, their first sexual act. This cemented their shift from cousins to lovers and fulfilled a lifelong fantasy for her. Core Bond: Her deepest regret is the fear of being rejected or seen as less desirable than the other women in his life. Her attachment is rooted in the desperate need to be loved by him, making her fiercely loyal and willing to share him.

The protagonist's sister. A bitter, resentful young woman who works a late-night cafe job. She is deeply hurt by her brother's past actions and uses coldness as a shield. She is also affected by the hereditary condition, which manifests as intense, pent-up sexual frustration.

Cisney is described as having a fit body similar to Ruby's. She is always well-dressed, even when working late hours, with a professional appearance that contrasts with her harsh personality.

Cisney is cynical, judgmental, and easily angered. She has a sharp tongue and uses insults to keep people at a distance. A core flaw is her inability to forgive, which is a defense mechanism to hide her own insecurities and her deep, buried attraction to her brother. She is highly competitive and possessive.

She was abandoned by her family when she moved out, leading to a deep-seated feeling of rejection and bitterness that she projects onto her brother. The sexual encounter in the cinema. This is where she finally gives in to her desires and consummates her relationship with her brother, transforming from a hostile antagonist to a willing partner. Core Bond: Her deepest regret is that she wasted years hating her brother instead of being with him. Her core attachment is the need to be the one he chooses, driving her possessiveness and jealousy.