My parents were religious, but more on the order of going to church once or twice a month. When I told them I was an atheist, my mother just said to keep an open mind and ignore the Old Testament. My father said he was a pantheist and not so much Christian. I just remember thinking, "Why did you send me to a church you did not believe in really?"
After my mother dealt with me being atheist and polyamorous, my younger sister had a little easier time coming out bisexual to them. My mother still likes to pretend everything is normal.
Anyway, welcome to the board.