Everything seems to be progressing well at the moment. The burrow is now complete, confirmed by the onset of mating. The female won’t allow the male to mate with her until she is happy with the burrow, as once mating commences she will begin egg production. Each egg takes about a day to produce and so the burrow must be ready to go as soon as the mating starts.
The female is spending most of her time now around the nest site, waiting for the male to bring her fish. This arrangement serves to help the female conserve all of her energy for the arduous process of egg production (one a day for about 6 days) while at the same time re-enforcing their pair bond.