Maurice, of course, assumes she has moved on to richer pastures, to another more novel lover, who can satisfy her demands in new, less committed ways. He hires a private detective to check on her. He talks to her husband and others with whom she has been acquainted. What he discovers is a surprising change of direction in her life and her priorities, a change that neither he nor Sarah's husband can either explain or accept.

Ultimately The End Of The Affair is about the space between people. Relationships are always limited, no matter how intimately they are shared. The Common, the geographical space between Maurice and Sarah, becomes a symbol of the no man's land that must be crossed when people interact. We enter into this territory when it is our intention to go part-way to meet the psyche of another, but perhaps we never really leave home. The territory can only be entered, but probably not crossed, when there is mutuality — at least a partially shared desire to meet in the unsafe space. But it remains a position that can be retracted, a space that can be abandoned at will.

What emerges in The End Of The Affair is that this space is specific to particular relationships. Scratch the surface of a different association of that same person, and it will reveal a different territory, perhaps not even sharing recognisable landmarks with the first. Perhaps, therefore, we project onto others what we want them to be. Perhaps relationships are never really shared, and remain at best pragmatic and, more likely, ultimately selfish. In the end, The End Of The Affair suggests that they are not, but it is only a suggestion.