When you lock a broody away from her nest, that is usually her reaction. Panic. Eggs can be damaged in the process. She doesn't graft to the eggs so much as the site she was setting in.
I would try to set up a plush broody nest in a dark corner of the coop on the floor, making it as private as possible and put some fake eggs in it. She may settle down on that nest. If she does, and she digs in and gets determined again and keeps going back to the new, secure nest site for at least 2 solid days, I'd give her back her eggs to finish hatching and raising.