The two were arrested on the order of Emperor John VIII, but managed to flee and were temporarily sheltered by the Genoese in Galata.
[1] In 1452, he scored a victory over an Ottoman army under Turahanoğlu Ahmed Bey at Leontari, by luring it into a narrow defile.
According to Sphrantzes, admittedly a hostile source, that was because Matthew, who was in charge of the salt monopoly, allowed his subordinates to cheat the Sultan's tax officials.
[1] After that the Sultan took pity on Demetrios and his wife, allowing them to settle in Adrianople, close to their daughter Helena, and provided them with a small stipend until their death in 1470.
[1][7] Bozhilov theorizes that Thomas Asen Palaiologos, a Byzantine exile in the Kingdom of Naples and a "lord of Corinth" himself, was his grandson.