@Lalaniku
Lady Olivia - a Duke's daughter- is the Emperor's pregnant consort.
As she has a higher initial social rank than that of the Empress (a Duke's Daughter, whereas the Empress is somewhere lower) if Lady Olivia gives birth to a son, that son will supercede Prince Ignatius' right to the throne. Given the tyrant that the Emperor is, the Empress and Prince Ignatius would be at best cast from the castle, but far more likely executed for some made up infraction.