Ask yourself this: is she attempting to convert you at home or behaving extremely religiously while at home? If the answer is no, then the only problem, from what I can gather of what you have written, is that she is behaving as normally as she can at home while simply going all out in the natural habitat of church.
"Never trust a fox. Looks like a dog, behaves like a cat."
~ Erin Hunter
~ Erin Hunter