Should I move my ducks nest?

My Rouen duck has been laying fertilized eggs for a few months now. She's layed in 3 different nests but hasn't sat on them. I assumed she wouldn't because we are approaching another cold Utah winter. Her current nest has around 25 eggs in it and she just started sitting on it! Her nest is under a bush in my flower bed. I was going to throw the eggs out until I realized she is sitting on them. Is there any chance of them even hatching? She I attempt moving her into my warm garage? It just snowed last night and temperature was 25 degrees!