Yahoo Web Search

At an exclusive prep school for boys, headmistress Claire Elliott (Joan Hackett) is at her wit's end. Her husband, Michael (Sam Waterston), regularly mistreats her, refuses a divorce and is rather openly conducting an affair with an attractive teacher named Vicky (Tuesday Weld). When Michael starts abusing Vicky, however, the women team up and resolve to avenge themselves. They kill Michael and make it look like an accident, but when the body disappears they fear that they've been found out. Wikipedia