You asked if you should move her. This will depend on your set up, and what you want to do. Your concern about the other hens breaking her broodiness is one thing I don't think you need to worry about. I have had hens lowest on the pecking order stay broody when left loose, but occasionally if there are other nests with eggs near the broody can change nests. If she seems to be sticking to the right nest other hens will still lay in the nest. You can solve this by marking the eggs she started with and remove all other eggs daily. If you choose to move her she needs to be in a place where she can not get back to the original nest. I put my broodies in dog kennels inside my coop. That way no one adds eggs and returning to the flock is easier. I open the kennels every morning. The hens take their break and then return to their nests. If the hen returns to their original nest then I simply pick them up and put them back in their cage. In my one coop I often start leaving the cage door open once the hen begins returning to the cage instead of her original nest.