Responses
I think it's an instinct almost for us to separate family and everyone else we're not related to. I guess some people can't differentiate. Those are the monkeys (as Geto would say) who in nature don't have that instinct, mate with a relative, and then they're lineage dies real quick and the problem solves itself
In fiction it's pretty hot tho. Have you read this yet? It's been some time
You know, in real life I don't get incest at all, why would you like a family member? It's gross, but in mangas this is kinda my guilty pleasure I haven't read this yet but sure I will ╮( ̄▽ ̄)╭