Hi,
Have you had her all her adult life?
I have read it is not uncommon for them to lay unfertile eggs I think.
Have you got anything you could make an incubation medium out of like coco-fibre or peat?
I'm not sure you need an incubator as they do not need high incubation temps - what are your normal room temps?
Have a search in this forum for the temps recommended - I seem to recall ******** being mentioned somewhere but I am not sure.
dr del