Up to you how you want to 'manage' it.
I personally don't like a broody taking up a nest nor do I want to deal with the problems that can occur in that situation....staggered hatch from other hens eggs being deposited in broody's nest, broken eggs from 'nest fighting', broody going back to wrong nest after her daily constitutional.
If I
want them to hatch a batch I put them in a separate area of coop(partitioned off with wire) with fake eggs in a floor nest, then if they stick to the nest for a couple days there I give them fresh fertile eggs and start the countdown. I also handle/touch my broody regularly(make 'friends' with her) so if there's problem she'll let me handle it.
Are you
sure you
want her to hatch..what with the new chicks you just incubated??
Here's my notes on broodies, maybe it will help you with your decisions:
You'll need to decide if you
want her to hatch out some chicks, and how you will 'manage' it.
Do you have, or can you get, some fertile eggs?
Do you have the space needed? Both for more chickens and she may need to be separated by wire from the rest of the flock.
Do you have a plan on what to do with the inevitable males? Rehome, butcher, keep in separate 'bachelor pad'?
If you decide to let her hatch out some fertile eggs, this is a great thread for reference and to ask questions.
It's a long one but just start reading the first few pages, then browse thru some more at random.
http://www.backyardchickens.com/t/496101/broody-hen-thread
If you don't want her to hatch out chicks, best to break her broodiness promptly.
My experience goes about like this: After her setting for 3 days and nights in the nest, I put her in a wire dog crate with smaller wire on the bottom but no bedding, set up on a couple of 4x4's right in the coop with feed and water.
I used to let them out a couple times a day, but now just once a day in the evening(you don't have to) and she would go out into the run, drop a huge turd, race around running, take a vigorous dust bath then head back to the nest... at which point I put her back in the crate. Each time her outings would lengthen a bit, eating, drinking and scratching more and on the 3rd afternoon she stayed out of the nest and went to roost that evening...event over, back to normal tho she didn't lay for another week or two. Or take her out of crate daily very near roosting time(30-60 mins) if she goes to roost great, if she goes to nest put her back in crate.
Chunk of 2x4 for a 'roost' was added to crate floor after pic was taken.
View attachment 1586064
And when I let them hatch:
View attachment 1586065