Incest Taboo - Ch. 2 - Innocent Incest (Final Part)

[MangaDex]

 

[anggitoz]

They're being too beautiful and good looking for doing what Charles of france does.

 

[Sheza]

They're being too beautiful and good looking for doing what Charles of france does.

If its first generation incest then there wont be any defects at all but since theyre japanese thats very unlikely since old japanese practices marriage between villagers and rarely with outsiders and that means doing it with your own blood relatives. Even if its centuries down the line after banning incest the injuries to their DNA is already there lying in dormant as a recessive gene. Hence i agree with you that theyre too beautiful for being the product of incest