A Severed Head (film)

A Severed Head is a 1970 British drama film starring Claire Bloom, Lee Remick, Richard Attenborough and Ian Holm, based on a novel of the same name by Iris Murdoch.

Meanwhile, Martin tries to keep his mistress, Georgie Hands, a secret. However, Palmers sister, Honor Klein, who once taught Georgie at Oxford University, tells Palmer and Antonia about their affair. Honor then introduces Georgie to Martins womanizing brother, Alexander. This is just the start of the various liaisons.

Source: Wikipedia