Help creating a King of Dragons?

[Fouredged Sword]

I guess now's when I also bring up the part where Dragonborn are asexual.

Yep, Big B basically overwrites that side of the dragonborn. No interest in getting jiggy. Now, you sill have a gender, just no interest in procreation. You are sterile anyway, so you can't even produce an heir naturally.

Now you are also a level 20 cleric. If you want to make a baby, both you and your dragon lady are capable of transmutation magic enough to make a baby in whatever biology you so please.

See BoEF for more details.