Why does Gustave scream when his mother tell's him the Phantom is really his father in Love Never Dies?
BEWARE -- THIS CONTAINS SPOILERS!Gustave's real father is the Phantom. On the night before her wedding to Raoul, Christine found the Phantom, unsure of who she should be with. She had one night of passion with the Phantom which resulted in Gustave. Christine was willing to be with the Phantom, forgetting Raoul but he knew that she had to marry him and left her early the next morning. Christine married Raoul and they raised Gustave as theirs.