Warhammer: My Biological Father Emperor and My Demigod Brother

Aaron Well, who lived in 600 BC, felt that his father was very incompetent, only a biological father, and had even driven his mother away.
Until he began to encounter a group of demigods in his dreams who were looking for their father, and they even called him their brother.
So that old man cheated on his wife?
Aaron was furious and wanted to avenge his mother.
However, his younger brothers called him "brother" too affectionately and even asked him for things his father had used, called some kind of holy relic, to kill demons.
The father's pillow was given to Guilliman, the clay tablet the father carved was given to Loga, the father's hunting spear was given to Lane, and the donkey the father rode was given to Chagatai...
Wait, Horus, what do you want? Your father's clothes?
In the 42nd millennium, all the Primarchs broke free from the river of time, liberated their warp nature, and escaped the shackles of loyalty and betrayal, together carrying their Father into eternity.
Then they made their elder brother sit on a golden toilet to handle all the affairs of the empire.
This is because this elder brother is the Emperor's biological son, and has no subspace component whatsoever.