At this late date you may just want to make a barricade around the nest box, if possible, giving Broody enough room to step out of her nest, eat & drink (from little dishes placed within), and take a poop. Once the chicks have hatched you should be able to move Broody & babies anywhere and they'll want to stay together.
If you can't enclose the nest area, just watch them carefully and move Broody & babies after they hatch.
I know that it is possible to keep a broody in the same coop with her flock, and for her to raise her babies there. But I think it's ideal to separate her as soon as it's certain she is broody. It can prevent a number of possible problems to do so. It's best to move broodies well after dark, and to make their move as smooth & seamless as possible. Move the entire nest box if you can. Shade the new location with cardboard or feed sacks to help broody settle in to her new location.