My mom was very religious, although she never agreed with the Pope (which I found hilarious), my dad was agnostic, and my sis was a believer too. My sis was absolutely fine with me being an atheist, but my mom acted like it was some failure on her part. We had all kinds of fights about it that felt a lot like I was coming out of the closet.

Thinking about it, if I had been about coming out of the closet, she would have been completely supportive of me. It's the Atheism that drove her up the walls.

My aunt just chose to ignore it, and change the subject abruptly, although she never asked me to go to church with her or anything. Then the other day on the phone she told me she got in a huge fight with a relative of ours, defending me as "atheists are perfectly good persons" and "you don't have to believe in god to have morals" and "don't bother calling her on easter, to her it's just another day of the week and that's perfectly fine". I must say it took me a while to register it all, I was... flabbergasted, and then jubilant. :D