Of course there are no guarantees, but I would not expect problems. If they were newly-hatched I might wonder if she would try to adopt them and abandon her eggs, but at 6 weeks old they are well past that stage. I would expect the hen to mostly ignore them, especially since they would be in a brooder and not able to come close to her nest. If they could get to her nest, I would expect her to chase them away and then go back to her eggs.
Of course my expectations could be wrong, so you won't know for sure unless you try it.