Romanos faced several conspiracies, mostly centred on his sister-in-law Theodora. In 1029 she planned to marry the Bulgarian prince Presian and to usurp the throne. The plot was discovered, Presian was blinded and tonsured as a monk but Theodora was not punished. In 1031 she was implicated in another conspiracy, this time with Constantine Diogenes, the Archon of Sirmium,and was forcibly confined in the monastery of Petrion.