The Neighbor (1993)

Myron Hatch (Rod Steiger) had the misfortune of watching his mother die in childbirth. Today, he is an obstetrician approaching retirement. He also owns the house next door in which Mary (Linda Kozlowski) and her husband live. Myron becomes increasingly fixated with Mary because she resembles his long-dead mother. When Mary becomes pregnant, he offers to be her obstetrician. Mary declines his offer, telling him she has chosen a female obstetrician in town. An obsessed Myron kills the competition but his obsession and fixation doesn’t stop there as Mary ends up at his mercy.