Preach the Gospel unceasingly. If necessary, use words.
~ Attributed, in various forms, to St. Francis of Assissi.
The best thing you can do is not
beat her over the head with it. Answer questions as they arise, admit it when you don't know the answer, and provide her with your reasoning when she asks. Eventually, you might
convert her; but, whatever happens with her faith journey, answering her questions will strengthen your faith.