Pearl held the key to that what her oldest daughter had become and it had ruined her image for her. Where Magnum had seen her in the final moments of her life, Pearl did held the evidence of the last year in her hooves. It was just like somepony added salt to an already open wound for her. Yet the facts were as they were and she knew she couldn't change them. What she could do though, was making sure that the secret she carried actually remained a secret so that neither her husband nor her youngest daughter knew that truly happened to Rarity herself.