DO you think the ending in chapter 8 was effective? Why or why not?

When he finally reaches the address, David is so tired he can barely walk. Narration describes how he felt that "if his happiest dreams came true, he could go on living: if not, this was the end." He picks up his bundle and rings the doorbell. A woman answers, and David knows immediately that it is the woman from Sophie's photograph. He begins to introduce himself, but the woman interrupts him. "The woman looked into his face," narration states, "and said clearly and distinctly 'David ... my son David.'" I think it is a happy ending and agrees with the theme and tone of the book.