With mom yeah, i can talk to her. But she is very biased for religion and sometimes it suffocates me. Atleast she does not meddle much with what i believe, i never directly told her but she knows that i do not believe in religion. She sometimes talk in an allusive way to point at my beliefs (or lack of them) but i am overall alright with her.
With dad...nope. For the recent years i talk with him in subjects which are relatively "safe waters" or ask questions to learn what he thinks. I rarely tell my own truthful opinion due to an incident several years ago. He has a less religious way of life than my mom but he is much more intolerant. He does not even know what i believe nor tolerate it if he knew.
I have an older sister, i can talk about any and everything w/o feeling judged with my sister. I told about her because in some cases she became a parental figure to me (maybe she acted like an older sibling would but she gave that type of feeling).