At this stage, probably take the stress off of her as most broodies are very stressed with the flock around their babies especially if they are on the low end of the pecking order and the other hens are being pushy with the babies.
I'd move and watch and see how she takes it. Then have a plan of re-integration so that she and babies can be integrated back into the main flock, often as a sub-flock within the main flock. That helps a lot with the lower on the pecking order reintegration...they go in as a group. I like to integrate with free range conditions in the yard (if you can)...with lots of elbow room. There will be some small skirmishes, but the subflock will stick together as a group making them more formidable to the more aggressive hens. Always have hiding places where a bird can duck and cover if she gets chased by an aggressive hen. Never allow an overly aggressive hen to draw blood or terrorize a more submissive hen...those meanies are best in soup!
Lady of McCamley
Thanks for all that good advice. Up till now my hens have been very sweet with each other, aside from the normal reinforcement of each hens place in the flock.
I was surprised when the one hen started that behavior.