Thanks very much for all the prayer support you guys are making for her! I deeply appreciate it :).
John and Kathleen, I've thought about sharing the story of Bernadette with her. I found a beautiful article about Bernadette's life on EWTN. I hesitate because it includes several concepts my sister might have a little trouble relating to, such as the way of the cross that was so obvious in Bernadette's life. Protestants often don't emphasize the great value of suffering, they don't talk about "victimhood" at all, and my sister might not understand all she's seeing or reading. The very foreignness might put her off.
I'm thinking I'd like to share things like Lourdes and Fatima with her after she's more open to the truth already, through theological dialogue and especially our prayers, for prayers reach the heart while ideas, reason and evidence simply reach the mind. I bought 13th Day and plan to watch it with her, but after she's more open to the ideas it presents. She has to be open to the idea that such things could be good and part of God's will before she'll take the next step and accept them as true.
I also have some good scriptures to discuss with her, pertaining to the Immaculate Conception, but she has to be open and see such a thing as a positive good if it happened before I can have any chance of convincing her that it did happen.
Prayer is the best thing I or any of the rest of us can do for her, and I firmly believe our prayers will be answered. I'll also have more theological dialogue with her to try, through the Holy Spirit, to clear away misconceptions she's accumulated in her time in Protestantism about what's most fitting and appropriate for Mary.
The Immaculate Conception is probably going to be her biggest theological hurdle and that's the one I'm praying for her to leap, through God's powerful grace and love :).
Thanks so much for your continued prayer! We still need it. It is the only answer to the whole problem because God is the only One Who can reach hearts.