she was raised in a religious cult and diddled as a child. she has friends but is too coy to discuss sex - she's is fun to fuck but decidedly prim and proper. the whole idea of porn makes her become irate. if she's seen porn before she probably ran out of the room before bussa buss performed.
if busting in her mouth is a priority than get rid of her. the religous girls suck because they can never enjoy anything sexual, so there will always be something she wont do, and than will fucking be depressed about it after she does it.