 He is in fact engaged to his cousin, Fleur-de-Lys de Gondelaurier, who is a spiteful socialite and jealous of Esmeralda's beauty.Not only that, he has agreed to let Archdeacon Claude Frollo spy on his meeting with Esmeralda.This decision proves his undoing, since as the couple prepare to have sex, the jealous Frollo attacks Phoebus by stabbing him in the back.