In that case, I suspect they are both feamales that have paired up as sometimes happens and would account for the eggs not being fertilised.
When eggs are laid, both angelfish will stop any other fish from approaching the eggs and will charge any that get too close.
Here's a video of my mated pair of angelfish either displaying or showing agression. The male is the yellow koi. The female the dark coloured one has laid eggs quite a number of times but the eggs never appear to be fertilised.
I'm wondering if they are actually both female?