It depends if the eggs were completely submerged if the eggs are still viable. If she is still hanging around the nest or sitting on top, she knows they still have a chance to hatch. If the eggs are no longer viable, she may or may not try to re-nest. Either way, she will move on from this nest and go about her life. Nature will not allow her to linger and worry about eggs that cannot successfully produce offspring. The Regal Swan