During Kate's, Milly's, and Merton's excursions through Venice, Kate gradually becomes jealous of Milly's attraction to Merton, so much so that she lures him away one night to have sex. Milly confronts her the next morning, though Kate denies that Merton is her lover. She realises that, if her scheme is to succeed, she must leave Venice without warning Merton. On their own in Venice, Merton's affection for Milly grows and the two form a strong bond, even as her condition worsens. One day Merton spots Lord Mark at a cafe; alarmed, he goes to visit Milly but is denied entry. Susan visits him and Merton realises that Kate has revealed their secret to Lord Mark to sabotage the whole scheme, knowing that Mark would tell Milly as revenge for her rejecting him. Nonetheless, Milly agrees to see Merton and the two share an intimate moment where she forgives him and says that she still loves both him and Kate, despite their actions. A few days later, Milly dies and Merton and Susan attend her funeral.