Annette, welcome to our forum. Goodness, you do have a problem – or actually the mama blue does. 14 days is the normal time for eggs to hatch and it would be a little late in the season any way, although where you live makes a difference. You could candle one egg to see if there is anything in it – the process for candling could be found on http://www.sialis.org. which is an excellent bluebird website with tons of information. If you do not wish to do this, I would just leave mama alone – she will get the idea they are not fertile at some point. Hope you will have better luck next year.