Fulk spent some time governing Jeusalem, but then was again summoned to Antioch to deal with a major Turkish invasion. However he was intercepted en route at Sidon by his half-sister Cecilia, who told him that 'Imad al-Din Zanki was besieging her husband Pons in the castle of Montferrand [it has been regarded as very unlikely that this was Zanki]. She demanded his intervention in a typically feminine way. He moved towards Montferrand to raise the siege, and the attackers withdrew