The Sacred Mound(1993)

Original title: Hin helgu vé

A seven-year-old boy is sent to a farm on a remote island, when his mother goes abroad. On the island the boy gets to know a twenty-year-old woman who seems willing to take on a mother's role. But the boy is reaching an age of sexual awareness and instead of regarding her as a mother figure; he falls obsessively in love with her.