That would explain why you are an atheist. Lol. I kid. I kid. But a lot of people tend to abandon their parents beliefs when it is strict like orthodox catholic.
hmm.. Well, my entire family have been strict catholics (including all my aunts and uncles.. my parents want me to marry a catholic lol).. my three brothers are the exact same way I was.. I was never really rebellious.. I've never had any reason not to believe in God.. Like, I know some people convert when their parents die or something, but that is just b/c of loss and shouldn't really count.. No one in my immediate family has died (grandparents, uncles, great grandparents).. yet. My grandmother does have Alzheimer's, which is probably the worst disease any human could ever be diagnosed with ever.. I am pretty sure that I would rather kill myself than live with Alzheimer's. But truthfully, I had no reason to turn against the church. In fact, when I first began thinking of atheism and nihilism (I didn't know what it was called at first), I seriously thought that I was the only person to have ever thought that way b/c I was so sheltered from the rest of the world. After a little research, and discovery of some philosophies like nihilism, I began to think a great deal about it.. the meaning of life, my purpose, my existence without the presence of god, what life would be like without god, etc..
Naw, I truly think that I discovered atheism on my own without any push at all from family, friends, etc. I discovered the truth through myself, and I am glad that I did so early in my life.