If you're worried about her getting on the stairs, there are gates that swing open both directions. They are fabulous! No more climbing over gates. They come in 2 heights. They are made by "Four Paws" and called a walk thru metal gate. They are a little expensive but well worth it. We got 1 in both heights for different doorways. Just check the door opening size.
One of the websites that carries these is:
http://www.petmountain.com/show_product/501107