The Good Mother (1988)

Newly-single mother Anna Dunlop has lived a healthy move in life with her six-year-old daughter Molly. Then, one day, she falls in love with Leo Cutter, an Irish sculptor and craftsman. Leo helps her find passion and fulfillment but at a tragic cost: Molly is soon exposed to their sexual relationship. Despite Leo teaching the curious child the differences of sex, Anna's overzealous ex-husband accuses him of molesting Molly and sues Anna for violating their custody agreement. It all leads to the downfall of Anna and Leo's relationship and a disastrous attempt by Anna to hang on to her love for Molly.