She may have been eating less as the eggs grew, maybe the weight of the eggs, and her not eating as much, have equaled out. 85 degrees is just a tad warm. The incubator temps will fluctuate as the temp of the room fluctuates. It's better to have it set lower so when the temp goes up you aren't reaching the high 80's. Lower temp eggs will hatch eventually but too high of temps can be dangerous for the eggs. It's real exciting when they lay, but then.............the wait. Argh!! Seems forever! In any case, I'm excited for you!