Depressed ringneck

[Lanazielinski]

I have a pair of ringnecks in an outdoor aviary and I recently placed a nest box inside hoping they would breed. Ive seen them mating once but ever since the hen has been sitting outside the nest box never going inside just sitting there quietly. It's been two weeks and It's very unlike her and I'm not sure if this is normal for a hormonal ringneck. Ive had her 17 years and she tried to sit on some eggs last year but nothing hatched. Any advice would be great