Um yeah.. not.
You should NOT give her the freedom to display her dominance. There should be only ONE alpha in your house and that is YOU. All those dogs should get along.
I am sorry if I was confusing in my original post as the above post obviously indicates that I was. I agree with the above post in that you should be the only one alpha in your house. You should have control over the dominance displays and any other behaviors of all members of your pack. However, between pack members displays also occur and you have the final say over what is tolerable and what is not. Your b should never be allowed to display dominance over you or other humans in the household however even the behavior where adults growl/bark etc at pups to correct them is a dominance behavior - just not dominant over you.
I hope that clears up what I was saying. If not, please ask again.