Hello, GhostHunter! So, I can say I was too in your feet (at least at first) and I'll say how it worked with me so you can see if it fits or not your situation.
First things first, I also am from a very christian home and family. From the first day of my life until 3 years ago, I spent every single sunday (or more) with my parents in the church. I was even really known there, used to sing in the ceremonies, write texts about the bible to be applied for reading in the week-report we had, studied teology and even went on missionary trips to many small towns around my country with the people I met there. That was pretty bad for me, not for who I am now, but mostly for the expectations I gave them. Now, I'm both agnostic and openly gay. When my parents discovered I am agnostic, my father started completely avoiding me and, when we happened to be in the same table during lunch, started always having a hard listening to me, because it was like I was always going to say something he would disagree. Same happened with mom, but with less extent. They both then, 2 or 3 weeks later, started being worried about my salvation, that I was going to hell, the price was too high to be endearing my racionality and that kind of stuff. That I should have more faith. 3 or more months later (i don't remember that well) they also started sharing bible versicles to my phone and putting the bible to hear in the car. And it has been working this way all this time.
You see, they haven't changed what they think. Neither that things on their religion will be different because their reality has changed. They kept their own beliefs. However, as time passed, they started seeing it with less "drama" - something they would overreact too much is something to be less indulging and more prospective: to understand that it is something they can't force you to change. It won't be good at first glance, but it gets better with time. I hope that helps you somehow!