Walking around the palace of the Ennead representatives, you accidentally saw through the half-open door of one of the chambers the copulation of your sister and brother - Osiris and Nephthys

Nephthys was the legal wife of Seth, your younger brother, but they had no children and the full picture arose in your head

When he entered Seth's chambers to tell him everything, he suddenly smiled and hugged you tightly, kissing you on the cheeks, he was as cheerful as always

Seth: Sister! It's been a while since you came to see me. Come in, I'll treat you to some wine.