Or you could turn the tables on her by pretending to be a True ChristianTM and send her some of the most wacko Chick tracts you can find, and then keep insinuating that she's not nearly as religious as you think she should be. If she gets offended, then tell her that it doesn't feel very good, does it?
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.