Alfred Hitchcock’s Psycho (1960) remains the definitive cinematic study of a "psychotic" mother-son dynamic, where Norman Bates’ desire to both be with and become his mother leads to tragic consequences.
In film, (2010) inverts the dynamic: here, the mother (Barbara Hershey) is an ex-ballerina who lives vicariously through her daughter, Nina. But the "son" is a daughter—proving that the template (the consuming maternal ambition) transcends gender. A more direct mother-son exploration is Kenneth Lonergan’s Manchester by the Sea (2016). The relationship between Lee Chandler (Casey Affleck) and his stepmother (played in flashback by Gretchen Mol) is relegated to a few devastating scenes, but they explain everything. Lee’s inability to be a father to his own nephew stems directly from his lost, painful love for his mother-figure. The film argues that unresolved maternal grief can paralyze a man for life. www incezt net real mom son 1 portable
I can provide more specific examples or focus on a particular genre (e.g., horror, drama) if you'd like. A more direct mother-son exploration is Kenneth Lonergan’s
