
After re-reading this manga (why? Because I just wanna see the world burn) I noticed that not only are they cousins (their moms are sisters) the uke is also their uncle (the ukes mom was given to the head of the family, while the sister that didnt have the mark was given to the son of the head of the family)
And considering the genetics, its a high possibility that the children born will be abnormal
The tree uaed the dwarf as a fertilizer
HAHAHAHAHA ^