Yes they do and while such practice is frowned upon in our society, the rules of this manhwa doesn’t. Fontaine said it so himself that intermarriages are common. Probably the reason why the author is writing it as such. The tension between them is enough to make the readers read and it might actually be a good move. It doesn’t need to be sexual per se but more scenes like this would suffice. We just love to see more of the chemistry between the two

i need a spin off with these two omfg!!!! the psychotic love is sexayyyyyy (/TДT)/