give the cat her space, let her come around on her own, but don't let the puppy over run the cat, cause the cat will just get annoyed, just give your cat its space, and some time, for her to get use to the idea of her having a new brother that's a dog you also might want to try to separate them, only let them meet while your there to look after them both, every time she goes after the puppy you can try spraying her in the face with water, that's how you get cats to stop bad habits, i bought a 50cent spray bottle at the store, that's used to put water in them, filled it up with water here at my house, usually my cat would go after my bird cage and knock it down, after awhile, of spraying her in the face with water, she stop going after the bird cage, now she just lays down next to the cage looking at the bird, not really doing anything to the bird or the cage