Country is correct, they do not use nesting materials. Sometimes the hen's bum will molt during the nesting period, and she will use the feathers. So don't worry if her bum is naked *ha*
I've never heard of a male not wanting the female in the nest, especially during mating season. Usually the male feeds the female while she is nesting, going in and out of the box and guarding the entry. Maybe they are confused since they waited so long *haha* If the second nest box doesn't stop the fighting, I would put the male in a separate cage, but keep them where they can see each other.
Good luck and keep us updated! Budgie eggs are so cute!
I've never heard of a male not wanting the female in the nest, especially during mating season. Usually the male feeds the female while she is nesting, going in and out of the box and guarding the entry. Maybe they are confused since they waited so long *haha* If the second nest box doesn't stop the fighting, I would put the male in a separate cage, but keep them where they can see each other.
Good luck and keep us updated! Budgie eggs are so cute!