Pietro's marriage with Maria made him her co-ruler in 1377, but he was still young. His father took care of the defense of Argos and Nauplia and sent supplies to the two towns in 1378. Federigo also bought a galley to defend the lordship against pirates in 1381. Heavy taxation during the War of Chioggia and a financial crisis menaced the family's position, but Pietro could keep his lordship after his father died in 1382. Pietro went to Argos to command the defense of Argos and Nauplia against the pirates in 1383. He returned to Venice, but he was planning to again visit his lordship in early 1385. Pietro was one of the lords in Frankish Greece whom King Peter IV of Aragon informed about his appointment of Bernard of Cornella as his vicar-general in the Duchy of Athens on 17 August 1387. Pietro died in 1387 or 1388. His widow sold the lordship to Venice on 12 December 1388.