I am a bi-sexual woman and have been dating girls for a few years after I split with my ex bf. I sometimes feel completely lesbian and other times not at all. I want to be able to talk to my parents about this but I am not sure how to approach the subject as I don't really know for sure what my sexuality is.

To confuse matters further I think my mother is gay. She shows my father no affection whatsoever and I cannot remember a time when she ever did. She has a vast collection of lesbian themed DVD's and books and recently bought herself a callender full of pics of female firefighters. Either she is gay or is trying to coax me out of the closet and trying to spark a reaction in me because she would never just come out and ask me if i was gay.
I have been wanting to talk about this with her for a while.I am afraid she is a closet lesbian and is unhappy in her marriage to my father.

Will my coming out encourage her coming out and therefore ruin my parents already fragile relationship?