No, if she is truly broody messing with her eggs might T her off but will Not break her broodiness. BUT Never add eggs to a broody unless ALL are replaced at one time----If you stick fresh eggs under her and she has been setting for a few days----you will create a staggered hatch---which is a Problem---you will probably have to put the latter eggs in the incubator to save them after she leaves the nest with the first hatch to take care of those chicks. I set All My Hens with the Eggs ""I"" collect---not what they just happen to flock on. If she is going to be with other chickens---I mark ALL the eggs I set her with clearly so every day I can look under her and remove unmarked eggs so No Staggered hatch happens. Then All the fertile eggs will hatch at around the same day---then she comes off the nest not leaving other eggs that might hatch in a few days----makes your and her life easy.
One other thing is get in the habit of ALWAYS collecting every egg from every nest, every day----no matter if a hen is on a nest----get the eggs, then if a hen is going broody you can mark and set her with the eggs you choose and there will be no other eggs to deal with----because you collected them every day---LOL.