Keep a close eye on her. A lot of hens hunker down to the nest when their babies internally pip, and can't be pried off the nest with a shoe horn at that point. That she came off to eat with pipped eggs, may indicate that she will abandon them as they start to hatch. I had a hen who was a great setter, but she abandoned the eggs when they started hatching! Happy to sit on quiet eggs. Taking care of noisy, demanding chicks... not so much!!!