Coming Out(?)

[Darkstar]

Yes? No? Maybe? You could appeal to general rules, but I think it would be more helpful to look at the specifics of this case. Particularly, I'm asking if and when/under what circumstances I should come out to my parent(s) and or siblings.


Some background information:

• Both of my parents are old earth creationists, however, I have am fairly certain that they accept most of mainstream science nonetheless.
  
• My parents are firm in their belief, but rarely vocal about it.
  
• My father is a member of the religious right.
  
• While I have heard my parents make rude remarks about atheists before, it is not common. I am inclined to think that my mother, at least, would not extend stereotypes about atheists to me. Also, the only atheist my mother has ever personally known was kind of a jerk about it, so yeah...
  
• With the exception of my father, my family rarely attends church. On the other hand, my mother despises the particular church we go to, so maybe we would be attending more if the services weren't mind-numbingly dull.
  
• My brother is a closeted agnostic atheist, something I discovered roughly six months ago when I privately outed myself to him. He isn't very knowledgeable on atheism vs. theism, but neither are my parents.
  
• My younger sister is not overtly religious, but I cannot tell much more than that.
  
• I am currently a college student; I don't think my being an atheist would jeopardize funding for this.
  
• My mother is easily offended.
  
• As far as I know, no one in my family holds any supernatural beliefs outside of religious ones.

So, all things considered (and if there is anything you would like me to add or specify, feel free to ask) what do you think I should do? Should I privately tell my younger sister? Should my brother and I simultaneously come out to my mother (if he wishes to)? We should probably leave my father out of this; I doubt he'll be accepting. "It's your choice" is kind of self-evident, so I don't think that counts as advice. Maybe "[insert advice here], but ultimately it's your choice" or something like that.