I thought it was incest but no cause they said that she had a different father so maybe the goddess wants her daughter to Mary the emperor and for her to return to her world. I guess
Yup, I think that's the direction that this is taking. Pretty fucked up thats she's grown up in less than a year and is now going to bang the dude that her mother banged
So the story states that their siblings BUT Apparently both of them have different souls