It's a little known fact but the game is based on the Greek play Oedipus rex where it was told by an Oracle that the MC would kill his own father (The king of Varron). When the king heard this he ordered his wife to kill his infant. She could not kill him instead she left him near Arenfield where Marcus found him and raised him as his own son. When Marcus is killed the MC want's revenge which in future update will lead to travel to Varron and kill the king and marry the queen (his mother) thereby fulfilling the prophecy of the oracle when the player finds out the truth after having two daughters with his "wife" he will gouge out his eyes and be exiled, that's how the game ends.Ok calm down no need to get all hot and bothered cause incest or non-incest stuff. Chyos still working on the game's story thus far and yes we don't even know if MC has a mother alive somewhere.
If i could gesticulate a theory MC is probaly the a Prince of one of the nations that were at war. (honestly that will be so obvious) If you ask me Chyos could vary MC's real origins, he could be a bastard that was taken by his "his foster father" away from bad waters from the kingdom (that is a good setup) but a more interesting setup will be to say that MC is the son of someone very high on the church hierarchy since we do find a lot of church related stuff on his basement, i would honestly like this origin more. But yea, no Emily is not his mother nor his step-mother since his father never really put the relationship he had with her into a marriageable level, he was planning too until Gurtak killed him.