Sunday Bloody Sunday (1971)

Divorced working woman Alex and well-to-do Jewish family doctor Daniel Hirsh share not only the same answering service but also the favours of young Bob Elkin who bed-hops between them as the mood takes him. Both Alex and Dr Hirsh are aware of the other's existence but prefer to live with the situation rather than risk losing Elkin completely. But a wet winter weekend in London can be difficult.