Careful, He Might Hear You (1983)

Director: Carl Schultz
Cast: Colleen Clifford, Geraldine Turner, Isabelle Anderson, John Hargreaves, Nicholas Gledhill, Peter Whitford, Robyn Nevin, Wendy Hughes

Synopsis:

Abandoned by his father after his mother dies, young PS lives in suburban Sydney with his aunt Lila and her husband George. While they lead a modest existence, PS is happy with them. However, his contentment is derailed when Lila’s wealthy sister, Vanessa, returns from England and takes an interest in PS.