Man, I just don't understand what the hell the author is doing.
He decides to bring in a legendary storyline of a dude smash a princess and her daughter in a 3-way, BUT MAKES IT FOR A SIDE CHARACTER?!
He then made that same side character be the head demon king of the dungeon, while our MC...
Her brothers are great. They totally do ship them together.
Just wish the FMC would show some more interest, like her blushing or wondering about love. Seems like she never reacts like that.