 Seeing that Heracles was being overwhelmed by the multi-headed monster (the Lernaean Hydra), who grew two heads in place of each one cut off, Iolaus helped by cauterizing each neck as Heracles beheaded it.Heracles gave his wife, Megara, age thirty three, to Iolaus, then only sixteen years old – ostensibly because the sight of her reminded him of his murder of their three children.They had a daughter, Leipephilene.