In The Playboy of the Western World by J. M. Synge, the reason that Christy Mahon returns home with is father is that he really doesn't have much choice about the matter. When the town realizes that his father is actually alive, he loses the status he gained by claiming to have killed his father. Pegeen helps the townsfolk in restraining him and loses all interest in marrying him. He also loses (one assumes) his employment at the pub. Perhaps more importantly, the confidence he gained when he though he had killed his father, the confidence that allowed him to take on the role of the "playboy of the western world", evaporates, and he returns to his old life of subordination to his father.