Careful, He Might Hear You is a 1983 Australian drama film. It is based on the 1963 novel of the same name by Australian- American author Sumner Locke Elliott. Two sisters are locked in a custody battle over their young nephew, PS, who has been raised by his aunt Lila and her husband George since his mother died soon after his birth. When Lila's richer sister Vanessa returns from overseas, she seeks custody of PS, citing the opportunities she can give him.