Objectively speaking. It's gross and creepy from our perspective as humans the same as Ellen's cuz she was reborn and held the same values as she did when she was human. But these are basically "gods" so they don't really have the same perspective on it like we humans do? Like have you seen the mess of relationships that is Greek Mythology or just mythologies in general. Egyptian too. I won't claim to be super educated on that part but getting into relationships with your siblings seems like a thing in mythologies. Not saying this to justify marrying your sibling though. DO NOT UNDER ANY CIRCUMSTANCE MARRY A SIBLING or blood related relative at any rate that is a whole bag of gross not to mention heath issues resulting from said union. Anyway sorry for ranting in your comment section (￣∇￣")
You can't marry a sibling because that would be creepy and gross