In 1109 Nest was abducted, perhaps not entirely reluctantly, by her second-cousin Owain ap Cadwgan, who stormed the castle walls with a company of 14 men and set fire to the wooden buildings.
Ym 1109 cafodd Nest ei herwgydio, heb fod yn gwbl anfodlon efallai, gan ei hail gefnder Owain ap Cadwgan, a ymosododd ar waliau’r castell â chwmni o 14 o ddynion ac a losgodd yr adeiladau pren.