The play tells the story of two couples who come together for a friendly after-party drink. Before long they are all desperately trying to destroy one another. By the end of the play, the deep flaws of both marriages have been revealed. The play ultimately shows how tenuous the line between love and hate can be.
With George and Martha hate and love are so closely wound together that it's almost impossible to tell them apart.
By the end of the play, George and Martha's relationship actually seems more promising than Nick and Honey's.