 As a result, Keratsa (along with him and their son) were imprisoned for three years, until they were liberated by the Genoese.On 12 August 1376, Andronikos IV deposed his father and replaced him as Emperor of the Byzantine Empire, with Keratsa as his Empress consort.The new imperial couple remained in control of Constantinople until 1 July 1379, when John V was restored to his throne.