Bodies.

This is the acting script published by Dramatist's Play Service. It is by British playwright, James Saunders and first performed in London in 1978, "...for two couples who are "middle-class, rate-paying and approaching the evening of their lives. Years before each had had an affair with the other's partner. For nine years they had not met." Now, without consulting his wife, one of the men invites them over for "a meal on Saturday."