How does Eddie react when rodolpho sings paper doll?

When Rodolpho sings "Paper Doll," Eddie reacts with jealousy and anger. He feels threatened by Rodolpho's charm and the affection Catherine shows towards him, leading to a confrontation. Eddie's discomfort escalates as he perceives Rodolpho's performance as a challenge to his authority and a sign of Rodolpho's romantic interest in Catherine. This moment highlights Eddie's protective instincts and foreshadows the growing tension between the characters.