The theme is frequently used in literature and film as a trope to signal moral decay, elite decline, or psychological trauma. Literary Exploration : Author Christine Angot’s autofiction novel, , uses the theme to explore emotional turmoil and trauma following parental boundary violations. Gothic Tropes : In works like Vampire Knight Game of Thrones , incestuous relationships are often used as critiques of lineage purity and social isolation. Genetics in Fiction A Song of Ice and Fire series, the lack of immediate deformities