Ok, a more thoughtful answer. Where you live is the melting pot with a lot of diversity. My Jewish friend dates a Buddhist guy whose best friend is a Catholic. Her BFF is a Hindu from India. Me, I'm an atheist whose family says to call it non-denominational and say "I'm still seeking", although my open minded dad would "ok" me saying "secular humanist". I say I'm an apethist, it doesn't have any meaning in my life. My FB BFF has her religious views on Facebook written LOVE, her political views written as LOVE. Bueno.
I'm saying if you want to culturally give her Catholic roots without having her buy the dogma then maybe you could visit a few other religious clergy and ask for the cliffs notes to their religions. There's several buddhist monasteries in Woodstock. I've heard that their service involves sitting and meditating quietly. I'm sure you can find a synagogue. The you can discuss what religion means to people abstractly without throwing her off on her catechism.
