Due to her husband's deforming disease, she soon grew estranged from him, and when he renounced his claim to the throne, she took their son and went to Io, where she stayed with her family. Erasmus threatened to raise an army and tear the city apart to get his son back, but his nephew King John Flynn intervened, ordering Felicity to return to her husband. She instead committed suicide via poison. She had also given Elric poison, but he was saved by his nurse, who forced the boy to vomit it up.
She is often mentioned in folk songs and is also known as "the madwoman of Io".