Father - dauhter incest film - Angel de Fuego (1992) - https://www.imdb.com/title/tt0105915/
Plot - Ángel de Fuego is a 1992 Mexican drama directed by Dana Rotberg in which 13-year-old Alma, a fire-breathing trapeze artist in a miserable traveling circus, is in a sexual incestuous relationship with her dying father Renato — a broken, decaying clown consumed by the memory of the wife who abandoned them both. When Alma becomes pregnant by her father and he dies, she is shunned and thrown out of the circus, left to wander the streets alone and carrying his child. She falls in with Refugio, a fanatical religious woman who leads a puppet troupe performing biblical stories in Mexico City's slums — but even there Alma finds no salvation, only more manipulation and cruelty, until she finally snaps and burns everything to the ground in one last act of desperate fury.
Note - Evangelina Sosa and Roberto Sosa, who are real-life brother and sister, were cast together in this film. In one scene, Evangelina's character appears nude while her real-life brother Roberto is also on screen, and their characters share a deeply unsettling sexual dynamic.
Link to watch - https://lustycinema.li/watch/ngel-de-fuego
Mother-Son Incest, Rare short film - Non Castus - https://www.imdb.com/title/tt5687484/
Plot - Non Castus is a 2016 Chilean short film directed by Andrea Castillo, in which Trinidad, a 42-year-old mother, and her 21-year-old son Camilo are forced to rent a single room together in a house in southern Chile after their father abandons the family. Isolated in that small space, surrounded by loneliness and nature, their relationship slowly transforms — what begins as the closeness of a mother and son united by shared guilt and grief crosses into something far more disturbing, as Trinidad realizes her feelings for Camilo are no longer purely maternal and the two are consumed by an incestuous desire that neither of them can resist.
https://lustycinema.li/watch/non-castus
Brother-Sister incest short film - Winter Sea (2004) - https://www.imdb.com/title/tt0436974/
Plot - Winter Sea is a 2004 American short film directed by Erika Tasini, in which a secretive young woman is involved in an intimate incestuous relationship with her brother — a bond they have carefully kept hidden from everyone around them. When an unexpected dinner guest arrives at their mother's house one evening, their carefully guarded secret is suddenly threatened, forcing both siblings to navigate the dangerous tension between keeping their forbidden relationship alive and the exposure that now looms over them.
Link to watch -
https://lustycinema.li/watch/winter-sea
Brother-Sister incest - León y Olvido (2004) - https://www.imdb.com/title/tt0414225/
Plot - León y Olvido is a 2004 Spanish drama directed by Xavier Bermúdez in which Olvido, a 21-year-old woman whose love life is in shambles, is left as the sole caretaker of her twin brother León — a young man with Down syndrome who clings to her completely and refuses to let anyone else into their world. Their relationship swings wildly between fierce tenderness and explosive conflict, with Spanish critics explicitly noting an incestuous undertone that Olvido herself seems to unconsciously encourage through her behavior — a dynamic that is challenged when Damián, a new man, enters both their lives and forces the siblings to confront the suffocating intensity of the bond they have built around each other.
Link to watch - https://lustycinema.li/watch/len-y-olvido