Just Sickenin'!

[Namelessfengir]

We don't even know how close cousins they were. Second cousins isn't that horrible to be honest.

I'm pretty sure Braska married Cid's sister, which would make Yuna and Brother first cousins

but then you ad in the half al bhed factor gives you a bit more diversity that would more than likely make children feasible, setting aside the fact of how ugly any children of brothers would be ...