Instead, she used a sleeping potion to subvert the monster's vigilance. Together they made off with the Fleece and escaped to the Argo. Setting sail at once, they eluded pursuit. Thus Jason succeeded in his heroic challenge. And once returned to Greece, he abandoned Medea for another princess. For though Jason had sworn to love and honor Medea for the service she had done him, he proved as fickle in this regard as he'd been unfit for single-handed questing.