Anyways before the modern times a father having 6-12 children was nothing outrageous. All of them surviving to adult age kinda was, though.

And now compare this to the fuckin' great leader of the empire with tons of money and resources to gather women and literally own a harem.
Especially if you add the fact marriages in the old times were kinda like treaties. Mary my daughter and I promise to not stab you in the back (except when I feel like it). Thrillseeking, political marriages and everything else between.
Obould is a fucking Khagn.