If she thinks they've just hatched, that would be quite normal. Is she still sitting on any eggs? that would encourage her to hold too.Naomi wants the chicks to stay under her, gets agitated when they want to check out their new home.
I'm off work for three days, will be monitoring the situation. If she decides to reject the chicks I'll just have to set up a heat source.
I assume you've put a water dish and food nearby for the chicks; is the concern that she will actually stop them consuming either?