Use the PDF, to cross reference. I explained if you are locked out of something there, and so far Mary and whichever path you didn't pick, working for Brenda or not, are the only things you're locked out of (apart from some temporary variable sex scenes, and certain sex scenes that you may not have enough points for, but the point spread is pretty generous, Barb and Sam's are that way, so is Brenda, there is one w Lydia you can get locked out of if you don't romance her well enough on the first date, it's all in the PDF written by the dev ME
, who happens to not suck at writing PDF guides, at least after 3 years I hope not).
Will Audrey's ending be slightly different if you did her love path or corruption path, yes. There is already a dialogue during and important scene with her that is. But, Shaddy doesn't know where I'm going with the future of the game. I myself only have a rough sketch, because that's my process. Beyond that I wouldn't tell people the ending now even if I did. It would be like watching a movie backwards. I won't railroad you though. The only blocks to girls content will be if you didn't have enough points or as in the case of Mary if you made the final rejection of her (which is noted in the PDF) she straight up tells you she won't ask again if you say no this time.