The character in question is 13 years old in 1975 and living in an upper-middle class suburban community on the American west coast. Her family is very politically conservative and they are actively church-going Protestants (although they don't belong to one of the more fundamentalist denominations). She goes to a private, although not religiously affiliated, school.
My question is, generally speaking, how much would a girl like this know about homosexuality? Would it be something that she would be warned against in church or would it just never be discussed? Would she hear anti-gay jokes or slurs in school, or was that not common behavior for kids at that time?
If she had a crush on a girl, would it be realistic for her to have a vague notion that this wasn't right or normal (or based on her background, would she instantly think it was 'sinful'?) Would it be too much of a stretch for her, if someone asked her if she was a lesbian, to not have a clear understanding of what that even meant?
Anything you can give me would be greatly appreciated. Thank you so much!