Just watch that the others don't continue to lay into the nest, best to mark the ones she has been sitting on with indelible felt tip pen (pencil just rubs off), so that you know. Otherwise you don't know when they should be hatching.
I usually take mine out mid-afternoon, when the rest are having their corn and make sure they get some, have a drink and do their enormous smelly pile of..... Then you can also check the eggs (and remove any new ones).
Having said that I have had a few broodies now that start sitting and then get bored after a few days, or keep chucking out the eggs they don't like... Prefer to use the incubator now.